Multicast capable/enabled routers forward multicast packets based on the routes in the Multicast Routing Information Base (MRIB). These routes are created in the MRIB during the process of building multicast distribution trees by the Multicast Protocols running on the router. Different IP Multicast routing protocols use different techniques to construct these multicast distribution trees.
If Multicast traffic is to be routed through a part of a network that does not support multicasting (routers which are not multicast capable) then the multicast packets are encapsulated in an IP datagram and sent as a unicast packet. When the multicast router at the remote end of the tunnel receives the packet, the router strips off the IP encapsulation and forwards the packet as an IP Multicast packet. This process of encapsulating multicast packets in IP is called tunneling.
The IPv4 Multicast menu page contains links to web pages that define and display Multicast parameters and data. To display this page, click IPv4 Multicast→Multicast in the tree view. Following are the web pages accessible from this menu page:
Use the Multicast Global Configurationpage to configure the administrative status of Multicast Forwarding in the router, and to display global multicast parameters.
Displays the multicast configuration settings such as flags, timer settings, incoming and outgoing interfaces, RPF neighboring routers, and expiration times of all the entries in the multicast mroute table containing the sourceipaddr or sourceipaddr | groupipaddr pair value(s).
Use the Multicast Interface Configurationpage to configure the TTL threshold of a multicast interface. You must configure at least one router interface before fields display on this page.
The Multicast Interface Configuration page contains the following fields:
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Interface — Select the routing interface you want to configure from the drop-down menu.
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TTL Threshold — Enter the TTL threshold below which a multicast data packet is not forwarded from the selected interface. Enter a number between 0 and 255. If you enter 0, all multicast packets for the selected interface are forwarded. You must configure at least one router interface to see this field.
Flags — The value displayed in this field is valid if the multicast routing protocol running is PIM-SM. The possible values are RPT or SPT. For other protocols a “------” (no value) is displayed.
The Multicast Admin Boundary Configuration page contains the following fields:
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Interface — Select the router interface for which the administratively scoped boundary is to be configured.
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Group IP — Enter the multicast group address for the start of the range of addresses to be excluded. The address must be in the range of 239.0.0.0 through 239.255.255.255.
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Group Mask — Enter the mask to be applied to the multicast group address. The combination of the mask and the Group IP gives the range of administratively scoped addresses for the selected interface.
The Multicast Admin Boundary Summary page displays the following fields:
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Interface — The router interface to which the administratively scoped address range is applied.
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Group IP — The multicast group address for the start of the range of addresses to be excluded.
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Group Mask — The mask that is applied to the multicast group address. The combination of the mask and the Group IP gives the range of administratively scoped addresses for the selected interface.
The Multicast Static MRoute Configuration page contains the following fields:
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Source IP — Enter the IP Address that identifies the multicast packet source for the entry you are creating.
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Source Mask — Enter the subnet mask to be applied to the Source IP address.
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RPF Next Hop— Enter the IP address of the neighbor router on the path to the source.
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Preference — Enter the preference with which the static mroute to be considered against other matching static mroute entry for a given source. The values should range from 1 to 255.
Preference — Enter the preference with which the static mroute to be considered against other matching static mroute entry for a given source. The values should range from 1 to 255.
Distance Vector Multicast Routing Protocol (DVMRP) exchanges probe packets with all its DVMRP enabled routers, it establishes two way neighboring relationships, and it builds a neighbor table. It exchanges report packets and creates a unicast topology table, with which it builds the multicast routing table. This table is used to route the multicast packets. Since every DVMRP router uses the same unicast routing protocol, routing loops are avoided.
The DVMRP menu page contains links to web pages that define and display DVMRP parameters and data. To display this page, click IPv4 Multicast→DVMRP in the tree view.
The DVMRP Global Configuration page contains the following fields:
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Admin Mode — Select Enable or Disable from the drop-down menu. This sets the administrative status of DVMRP to active or inactive. The default is Disable.
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Version — The current value of the DVMRP version string.
Use the DVMRPInterface Configurationpage to configure a DVMRP interface. You must configure at least one router interface before you configure a DVMRP interface. Otherwise you see a message telling you that no router interfaces are available, and the configuration screen is not displayed.
The DVMRPInterface Configuration page contains the following fields:
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Interface — Select the interface for which data is to be configured. You must configure at least one router interface before you configure a DVMRP interface.
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Interface Mode — Select Enable or Disable from the drop-down menu to set the administrative mode of the selected DVMRP routing interface.
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Interface Metric — Enter the DVMRP metric for the selected interface. This value is sent in DVMRP messages as the cost to reach this network. Valid values are from 1 to 31.
Use the DVMRP Configuration Summarypage to display or print the DVMRP configuration and data for a selected interface. You must configure at least one router interface before you can display data for a DVMRP interface. Otherwise you see a message telling you that no router interfaces are available, and the configuration summary screen is not displayed.
The DVMRP Configuration Summary page contains the following fields:
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Interface — Select the interface for which data is to be displayed. You must configure at least one router interface before you can display data for a DVMRP interface.
Generation ID — Displays the DVMRP generation ID used by the router for the selected interface. This value is reset every time an interface is (re)started and is placed in prune messages. A change in generation ID informs the neighbor routers that any previous information about this router should be discarded.
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Received Bad Packets — The number of invalid packets received on the selected interface.
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Received Bad Routes — The number of invalid routes received on the selected interface.
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Sent Routes — The number of routes sent on the selected interface.
Neighbor IP — The IP address of the neighbor whose information is displayed.
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State — The state of the specified neighbor router on the selected interface, either active or down.
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Neighbor Uptime — The DVMRP uptime for the specified neighbor on the selected interface. This is the time since the neighbor entry was learned.
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Neighbor Expiry Time — The DVMRP expiry time for the specified neighbor on the selected interface. This is the time left before this neighbor entry ages out, and is not applicable if the neighbor router's state is down.
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Generation ID — The DVMRP generation ID for the specified neighbor on the selected interface.
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Major Version — The DVMRP Major Version for the specified neighbor on the selected interface.
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Minor Version — The DVMRP Minor Version for the specified neighbor on the selected interface.
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Capabilities — The DVMRP capabilities of the specified neighbor on the selected interface.
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Received Routes — The number of routes received for the specified neighbor on the selected interface.
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Received Bad Packets — The number of invalid packets received for the specified neighbor on the selected interface.
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Received Bad Routes — The number of invalid routes received for the specified neighbor on the selected interface.
The Prune Summary page displays the following fields:
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Group IP — The group address which has been pruned.
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Source IP — The address of the source or source network which has been pruned.
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Source Mask — The subnet mask to be combined with the source IP address to identify the source or source network which has been pruned.
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Expiry Time (secs) — The amount of time remaining before this prune should expire at the upstream neighbor. If no prune messages have been received from downstream neighbors, this is set to value of the default prune lifetime timer, otherwise it is set to the smallest received value or the default timer, whichever is less.
The Route Summary page displays the following fields:
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Source Address - The network address that is combined with the source mask to identify the sources for this entry.
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Source Mask — The subnet mask to be combined with the source address to identify the sources for this entry.
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Upstream Neighbor — The address of the upstream neighbor (for example, RPF neighbor) from which IP datagrams from these sources are received.
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Interface — The interface on which IP datagrams sent by these sources are received. A value of 0 typically means the route is an aggregate for which no next-hop interface exists.
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Metric — The distance in hops to the source subnet.
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Expiry Time — The minimum amount of time remaining before this entry is aged out.
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Up Time — The time since the route represented by this entry was learned by the router.
The Internet Group Management Protocol (IGMP) is used by IPv4 systems (hosts and routers) to report their IP multicast group memberships to any neighboring multicast routers. The PowerConnect 6200 Series performs the multicast router role of the IGMP protocol, which means it collects the membership information needed by the active multicast routing. The currently supported multicast routing protocols in the PowerConnect 6200 Series are DVMRP, PIM-DM, and PIM-SM.
The PowerConnect 6200 Series supports IGMP Version 3. Version 3 adds support for source filtering, which is the ability for a system to report interest in receiving packets only from specific source addresses, as required to support Source-Specific Multicast [SSM], or from all but specific source addresses, sent to a particular multicast address. Version 3 is designed to be interoperable with Versions 1 and 2.
The IGMP menu page contains links to web pages that define and display IGMP parameters and data. To display this page, click IPv4 Multicast→IGMP in the tree view.
The IGMP Global Configuration page contains the following field:
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Admin Mode — Select Enable or Disable from the drop-down menu to set the administrative status of IGMP in the router to active or inactive. The default is Disable.
The Routing Interface menu page contains links to web pages that configure and display IGMP routing parameters and data. To display this page, click IPv4 Multicast→IGMP→Routing Interface in the tree view. Following are the web pages accessible from this menu page:
Use the IGMP Interface Configurationpage to configure and/or display router interface parameters. You must configure at least one valid routing interface before you can access this page and configure IP Multicast IGMP.
The IGMP Interface Configuration page contains the following fields:
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Interface — Select the interface for which data is to be displayed or configured from the drop-down menu.
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Interface Mode — Select Enable or Disable from the drop-down menu to set the administrative status of IGMP on the selected interface. The default is Disable.
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Version — Enter the version of IGMP you want to configure on the selected interface. Valid values are 1 to 3, and the default value is 3. This field is configurable only when IGMP interface mode is enabled.
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Robustness — Enter the robustness value. This variable allows tuning for the expected packet loss on a subnet. If you expect the subnet to be lossy, you should enter a higher number for this parameter. IGMP is robust to (robustness variable-1) packet losses. Valid values are from 1 to 255. The default value is 2.
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Query Interval (secs) — Enter the frequency in seconds at which IGMP host-query packets are to be transmitted on this interface. Valid values are from 1 to 3600. The default value is 125.
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Query Max Response Time (1/10 of a second) — Enter the maximum query response time to be advertised in IGMPv2 queries on this interface, in tenths of a second. The default value is 100. Valid values are from 0 to 255.
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Startup Query Interval (secs) — Enter the number of seconds between the transmission of startup queries on the selected interface. The valid values are from 1 to 300. The default value is 31.
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Startup Query Count — Enter the number of queries to be sent on startup. The valid values are from 1 to 20. The default value is 2.
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Last Member Query Interval (1/10 of a second) — Enter the last member query interval in tenths of a second. This is the maximum response time to be inserted into group-specific queries sent in response to leave group messages, and is also the amount of time between group-specific query messages. Valid values are from 0 to 255. The default value is 10. This value is not used for IGMP version 1.
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Last Member Query Count — Enter the number of queries to be sent on receiving a leave group report. Valid values are from 1 to 20. The default value is 2.
Use the IGMP Configuration Summarypage to display IGMP routing parameters and data. You must configure at least one IGMP router interface to access this page.
Robustness — The robustness parameter for the selected interface. This variable allows tuning for the expected packet loss on a subnet. If a subnet is expected to be lossy, the robustness variable may be increased. IGMP is robust to (robustness variable-1) packet losses.
Last Member Query Interval (1/10 of a second) — The last member query interval is the maximum response time inserted into group-specific queries sent in response to leave group messages, and is also the amount of time between group-specific query messages. This value may be tuned to modify the leave latency of the network. A reduced value results in reduced time to detect the loss of the last member of a group. This value is not used for IGMP version 1.
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Last Member Query Count — The number of queries to be sent on receiving a leave group report.
Querier — The address of the IGMP querier on the IP subnet to which the selected interface is attached.
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Querier Status — Indicates whether the selected interface is in querier or non querier mode.
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Querier Up Time (secs) — The time in seconds since the IGMP interface querier was last changed.
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Querier Expiry Time (secs) — The time in seconds remaining before the other querier present timer expires. If the local system is the querier, this is zero.
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Wrong Version Queries — The number of queries that have been received on the selected interface with an IGMP version that does not match the IGMP version configured for the interface, over the lifetime of the entry. IGMP requires that all routers on a LAN be configured to run the same version of IGMP. Therefore, a configuration error is indicated if any queries are received with the wrong version number.
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Number of Joins — The number of times a group membership has been added on the selected interface; that is, the number of times an entry for this interface has been added to the cache table. This gives an indication of the amount of IGMP activity on the interface.
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Number of Groups — The current number of entries for the selected interface in the cache table.
Use the IGMP Cache Informationpage to display cache parameters and data for an IP multicast group address. You must configure at least one IGMP router interface to access this page. Also, group membership reports must have been received on the selected interface for data to display here.
The IGMP Cache Information page displays the following fields:
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Interface — Select the interface for which data is to be displayed.
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected interface you cannot make this selection, and none of the data on this page displays.
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Last Reporter — The IP address of the source of the last membership report received for the IP Multicast group address on the selected interface.
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Up Time — The time elapsed since this entry was created.
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Expiry Time — The minimum amount of time remaining before this entry ages out.
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Version 1 Host Timer — The time remaining until the local router assumes that there are no longer any IGMP version 1 members on the IP subnet attached to this interface. When an IGMPv1 membership report is received, this timer is reset to the group membership timer. While this timer is non-zero, the local router ignores any IGMPv2 leave messages for this group that it receives on the selected interface. This field is displayed only if the interface is configured for IGMP version 1.
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Version 2 Host Timer — The time remaining until the local router assumes that there are no longer any IGMP version 2 members on the IP subnet attached to this interface. When an IGMPv2 membership report is received, this timer is reset to the group membership timer. While this timer is non-zero, the local router ignores any IGMPv1 and IGMPv3 leave messages for this group that it receives on the selected interface. This field is displayed only if the interface is configured for IGMP version 2.
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Compatibility — This parameter shows group compatibility mode (v1, v2 and v3) for this group on the specified interface.
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Filter Mode — The source filter mode (Include/Exclude/NA) for the specified group on this interface. When NA mode is active the field is blank.
Use the IGMP Interfacepage to display detailed membership information for an interface. You must configure at least one IGMP router interface to access this page. Also, group membership reports must have been received on the selected interface for data to display here.
The IGMP Interface page displays the following fields:
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected interface, you cannot make this selection, and none of the remaining fields are displayed.
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Interface — The interface on which multicast packets are forwarded.
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Group Compatibility Mode — The group compatibility mode (v1, v2 and v3) for this group on the specified interface.
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Source Filter Mode — The source filter mode (Include/Exclude/NA) for the specified group on this interface.
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Source Hosts — The source addresses which are members of this multicast address.
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Expiry Time — The expiry time interval against each source address which are members of this multicast group. This is the amount of time after which the specified source entry is aged out.
The purpose of IGMP Proxy is to enable a multicast router to learn multicast group membership information and be able to forward multicast packets based upon the group membership information. The IGMP Proxy is capable of functioning only in certain topologies that do not require Multicast Routing Protocols (i.e. DVMRP, PIM-DM, and PIM-SM) and that have a tree-like topology, as there is no support for features like spanning tree to correct packet route loops.
The Proxy Interface menu page contains links to web pages that define and display Proxy Interface parameters and data. To display this page, click IPv4 Multicast→IGMP→Proxy Interface in the tree view. Following are the web pages accessible from this menu page:
Use the IGMP Proxy Interface Configurationpage to configure IGMP proxy for an interface. You must have configured at least one router interface before configuring or displaying data for an IGMP proxy interface, and it should not be an IGMP routing interface.
The IGMP Proxy Interface Configuration page contains the following fields:
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Interface — Select the port for which data is to be displayed or configured from the drop-down menu. You must have configured at least one router interface before configuring or displaying data for an IGMP Proxy interface and it should not be a IGMP routing interface. This field is configurable only when interface mode is disabled.
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Interface Mode — Select Enable or Disable from the drop-down menu to set the administrative status of IGMP Proxy on the selected interface. The default is Disable. Routing, IGMP, and Multicast global admin modes should be enabled to enable IGMP Proxy interface mode.
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Unsolicited Report Interval — Enter the unsolicited time interval value in seconds. The Unsolicited Report Interval is the time between repetitions of a host's initial report of membership in a group. Valid values are from 1 to 260. The default value is 1.
Use the IGMP Proxy Configuration Summarypage to display proxy interface configurations by interface. You must have configured at least one router interface configured before data displays on this page.
The IGMP Proxy Configuration Summary page displays the following fields:
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Interface — Displays the interface on which IGMP proxy is enabled. There can be only one IGMP Proxy interface.
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IP Address — The IP address of the IGMP Proxy interface.
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Subnet Mask — The subnet mask for the IP address of the IGMP Proxy interface.
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Admin Mode — The administrative status of IGMP Proxy on the selected interface.
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Operational Mode — The operational state of IGMP Proxy interface.
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Number of Groups — The current number of multicast group entries for the IGMP Proxy interface in the cache table.
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Version — The version of IGMP configured on the IGMP Proxy interface.
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Unsolicited Report Interval — The Unsolicited Report Interval is the time between repetitions of a host's initial report of membership in a group. Default: 1 second.
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Version 1 Querier Timeout — The older IGMP version 1 querier timeout value in seconds. The Older Version Querier Interval is the time-out for transitioning a host back to IGMPv3 mode once an older version query is heard. When an older version query is received, hosts set their Older Version Querier Present Timer to Older Version Querier Interval.
Use the IGMP Proxy Interface Membership Infopage to display interface membership data for a specific IP multicast group address. You must have configured at least one router interface before you can display interface membership information, and it should not be an IGMP routing interface. Also, if no group membership reports have been received on the selected interface, no data displays on this page.
The IGMP Proxy Interface Membership Info page displays the following fields:
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Interface — Displays the interface on which IGMP proxy is enabled.
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected interface you cannot make this selection, and none of the following data displays.
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Last Reporter — The IP address of the source of the last membership report received for the IP Multicast group address on the IGMP Proxy interface.
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Up Time (secs) — The time elapsed since this entry was created.
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State — The state of the host entry. A Host can be in one of the state. Non-member state - does not belong to the group on the interface. Delaying member state - host belongs to the group on the interface and report timer running. The report timer is used to send out the reports. Idle member state - host belongs to the group on the interface and no report timer running.
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Number of Sources — The number of source hosts present in the selected multicast group.
Use the IGMP Proxy Interface Membership Info Detailedpage to display detailed interface membership data. You must have configured at least one router interface before you can display detailed interface membership information, and it should not be an IGMP routing interface. Also, if no group membership reports have been received on the selected interface you cannot display data.
To display the page, click IPv4 Multicast→IGMP→Proxy Interface→Interface Membership InfoDetailed in the tree view.
The IGMP Proxy Interface Membership Info Detailed page contains the following fields:
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Interface — Select the interface for which data is to be displayed.
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected interface, you are not able to make this selection, and none of the non-configurable data is displayed.
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Source IP — This parameter shows source addresses that are members of this multicast address.
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Last Reporter — The IP address of the source of the last membership report received for the selected interface’s IP Multicast group address.
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Up Time (secs) — Displays the up time since the entry was created in the cache table.
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State — The state of the host entry. A host can be in one of the following states:
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Non-member State — Does not belong to the group on the interface.
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Delaying Member State — Host belongs to the group on the interface and report timer is running. The report timer is used to send out the reports.
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Idle Member State — Host belongs to the group on the interface and no report timer is running.
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Filter Mode — The group filter mode (Include/Exclude/None) for the specified group on the IGMP Proxy interface.
Multicast Listener Discovery (MLD) protocol enables IPv6 routers to discover the presence of multicast listeners, the nodes who wish to receive the multicast data packets, on its directly-attached interfaces. The protocol specifically discovers which multicast addresses are of interest to its neighboring nodes and provides this information to the active multicast routing protocol that makes decisions on the flow of multicast data packets.
The Multicast router sends General Queries periodically to request multicast address listeners information from systems on an attached network. These queries are used to build and refresh the multicast address listener state on attached networks. Multicast listeners respond to these queries by reporting their multicast addresses listener state and their desired set of sources with Current-State Multicast address Records in the MLD2 Membership Reports. The Multicast router also processes unsolicited Filter-Mode-Change records and Source-List-Change Records from systems that want to indicate interest in receiving or not receiving traffic from particular sources.
The MLD Global Configuration page contains the following field:
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Admin Mode — Select Enable or Disable to set the MLD administrative status. The default is disable. Click Apply Changes to send the updated configuration to the router. Configuration changes take effect immediately. These changes will not be retained across a power cycle unless a save is performed.
Use the MLD Routing Interface Configuration page to enable selected IPv6 router interfaces to discover the presence of multicast listeners, the nodes who wish to receive the multicast data packets, on its directly attached interfaces. To access this page, click IPv6 Multicast→MLD→Routing Interface→Interface Configuration in the navigation tree.
Query Interval — Specify the number of seconds between MLD general queries. Valid values are 1 to 3600. The default value is 125.
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Query Max Response Time (secs) — Enter the maximum query response time to be advertised in MLDv2 queries on this interface, in ms. The default value is 10000. Valid values are 0 to 65535 milliseconds (ms).
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Last Member Query Interval — Enter the maximum response time inserted into group-specific queries sent in response to leave group messages. This value is also the amount of time between group-specific query messages. This value may be tuned to modify the leave latency of the network. Valid values are 0 to 65535 milliseconds (ms). The default is 1000.
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Last Member Query Count — The number of queries to be sent on receiving a leave group report. Valid values are 1 to 20. The default is 2.
Use the MLD Routing Interface Summary page to display information and statistics on a selected MLD-enabled interface. You must configure at least one IGMP router interface to access this page.
Global Admin Mode — Displays whether MLD has been globally enabled or disabled.
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Interface Mode — Displays whether the administrative status of MLD on the selected interface is enabled or disabled.
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Operational Mode — Displays the operational state of MLD on the selected interface, regardless of the administrative setting.
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Version — Displays the version of MLD configured on the selected interface.
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Query Interval — Displays the interval in seconds at which MLD host-query packets are transmitted on the selected interface.
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Query Max Response Time — Displays the maximum query response time in milliseconds (ms) advertised in MLDv2 queries from the selected interface.
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Robustness — Displays the robustness parameter for the selected interface. This value allows tuning for the expected packet loss on a subnet. If a subnet is expected to be lossy, increase the robustness variable. MLD is robust to (robustness variable - 1) packet losses.
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Startup Query Interval — Displays the interval in seconds at which startup queries are sent on the selected interface.
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Startup Query Count — Displays the number of queries to be sent upon startup.
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Last Member Query Interval — Displays the maximum response time, in milliseconds, inserted into group-specific queries sent in response to leave group messages. This value is also the amount of time between group-specific query messages. This value may be tuned to modify the leave latency of the network. This value may be tuned to modify the leave latency of the network. A reduced value results in reduced time to detect the loss of the last member of a group.
Querier Status — Displays whether the selected router interface is currently the MLD querier. If another interface on the network has a lower source IP address, it becomes the querier.
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Querier — The address of the MLD querier on the IP subnet to which the selected interface is attached.
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Querier Up Time — The time in hours:minutes:seconds since the MLD interface querier was last changed.
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Querier Expiry Time — The time in hours:minutes:seconds remaining before the other querier present timer expires. If the local system is the querier, this will be zero.
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Wrong Version Queries Received — The number of queries that have been received on the selected interface with an MLD version that does not match the MLD version configured for the interface, over the lifetime of the entry. MLD requires that all routers on a LAN be configured to run the same version of MLD. Therefore, a configuration error is indicated if any queries are received with the wrong version number.
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Number of Joins Received — The number of times a group membership has been added on the selected interface; that is, the number of times an entry for this interface has been added to the cache table. This gives an indication of the amount of MLD activity on the interface.
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Number of Groups — The current number of entries for the selected interface in the cache table.
Click Refresh to display the latest information from the router.
The MLD Routing Interface Cache Information page displays cache parameters and data for an IP multicast group address that has been reported to operational MLD routing interfaces. You must configure at least one MLD router interface to access this page. Also, group membership reports must have been received on the selected interface in order for data to be displayed here. To access this page, click IPv6 Multicast→MLD→Routing Interface→Cache Information in the navigation tree.
The MLD Routing Interface Cache Information page contains the following fields:
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. Only if group membership reports have been received on the selected interface can you make this selection, and the data on this page displays.
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Interface — Select the MLD routing interface for which data is displayed.
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Last Reporter — The IP Address of the source of the last membership report received for this IP Multicast group address on the selected interface.
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Up Time — The time elapsed in hours:minutes:seconds since this entry was created.
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Expiry Time — The cache timer value which indicates the remaining lifetime in hours:minutes:seconds for each entry.
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Version1 Host Timer — The time in hours:minutes:seconds remaining until the local router assumes that there are no longer any MLD version 1 members on the IP subnet attached to this interface. When an MLDv1 membership report is received, this timer is reset to the group membership timer.
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Compatibility — The compatibility mode (V1, V2) for this multicast group on the specified interface.
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Filter Mode — The source filter mode for the specified multicast group on this interface. Possible values are Include, Exclude and NA. When NA mode is active, this field is blank.
The MLD Routing Interface Source List Information page displays detailed membership information for an interface. You must configure at least one MLD router interface to access this page. Also, group membership reports must have been received on the selected interface in order for data to be displayed here. To access this page, click IPv6 Multicast→MLD→Routing Interface→Source List Information in the navigation tree.
The MLD Routing Interface Source List Information page contains the following fields:
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. Only if group membership reports have been received on the selected interface can you make this selection, and the data on this page displays.
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Interface — Select the MLD routing interface for which data is displayed.
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Group Compatibility Mode — The compatibility mode (V1, V2) for this multicast group on the specified interface.
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Source Filter Mode — The source filter mode for the specified multicast group on this interface. Possible values are Include, Exclude and NA. When NA mode is active, this field is blank.
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Source Hosts — The source addresses which are members of this multicast address.
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Expiry Time — The expiry time interval in hours:minutes:seconds for each source address that is a member of this multicast group. This is the length of time after which the specified source entry is aged. out.
Use the MLD Proxy Interface Configuration page to enable and disable ports as MLD proxy interfaces. To display this page, click IPv6 Multicast→MLD→Proxy Interface→Interface Configuration in the navigation tree.
The MLD Proxy Interface Configuration page contains the following fields:
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Interface — Select the interface for which data is to be displayed or configured from the menu. You must have configured at least one router interface before configuring or displaying data for an MLD Proxy interface and it should not be a MLD routing interface.
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Interface Mode — Select enable or disable from the menu to set the administrative status of MLD Proxy on the selected interface. The default is disable. Routing, MLD and Multicast global admin modes should be enabled to enable MLD Proxy interface mode.
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Unsolicited Report Interval — Enter the unsolicited time interval value in seconds. The Unsolicited Report Interval is the time between repetitions of a host's initial report of membership in a group. Valid values are from (1 to 260). The default value is 1.
Click Apply Changes to send the updated configuration to the switch. Configuration changes take effect immediately. These changes will not be retained across a power cycle unless a save is performed.
Use the MLD Proxy Configuration Summary page to view configuration and statistics on MLD proxy-enabled interfaces. To display this page, click IPv6 Multicast→MLD→Proxy Interface→Configuration Summary in the navigation tree.
The MLD Proxy Configuration Summary page contains the following fields:
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Interface — Select the interface on which MLD proxy is enabled and for which data is to be displayed.
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IPv6 Address — The IPv6 address of the MLD Proxy interface.
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Prefix Length — Displays the prefix length for the IPv6 address of the MLD Proxy interface.
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Admin Mode — The administrative status of MLD Proxy on the selected interface.
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Operational Mode — The operational state of MLD Proxy interface.
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Number of Multicast Groups — The current number of multicast group entries for the MLD Proxy interface in the cache table.
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Version — The version of MLD configured on the MLD Proxy interface.
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Unsolicited Report Interval — The Unsolicited Report Interval in seconds is the time between repetitions of a host's initial report of membership in a group.
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Version 1 Querier Timeout — The older MLD version 1 querier timeout value in hours:minutes:seconds. The Older Version Querier Interval is the time-out for transitioning a host back to MLD mode once an older version query is heard. When an older version query is received, hosts set their Older Version Querier Present Timer to Older Version Querier Interval.
The Interface Membership Information page lists each IP multicast group for which the MLD proxy interface has received membership reports. To display this page, click IPv6 Multicast→MLD→Proxy interface→Interface Membership Info in the navigation tree.
The Interface Membership Information page contains the following fields:
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Interface — Displays the interface on which MLD proxy is enabled.
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected interface you will not be able to make this selection, and none of the non-configurable data will be displayed.
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Last Reporter — The IP address of the source of the last membership report received for the IP Multicast group address on the MLD Proxy interface.
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Uptime — The time elapsed since this entry was created. Displayed in hours:minutes:seconds.
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State — The state of the host entry. A host can be in one of the following states:
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Non-member. Does not belong to the group on the interface.
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Delaying Member. Host belongs to the group on the interface and report timer is running. The report timer is used to send out the reports.
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Idle Member. Host belongs to the group on the interface and no report timer is running.
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Filter Mode — The group filter mode for the specified group on the MLD Proxy interface. Possible values are Include, Exclude, or None.
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Number of Sources — The number of source hosts present in the selected multicast group.
Click Refresh to refresh the data on the screen with the present state of the data in the router.
The Interface Membership Information—Detailed page provides additional information on the IP multicast groups for which the MLD proxy interface has received membership reports. To display this page, click IPv6 Multicast→MLD→Proxy Interface→Interface Membership Info Detailed in the navigation tree.
The Interface Membership Information — Detailed page contains the following fields:
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Interface — Select the interface on which MLD proxy is enabled for which data is to be displayed.
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Multicast Group IP — Select the IP multicast group address for which data is to be displayed. If no group membership reports have been received on the selected MLD Proxy interface you will not be able to make this selection, and none of the non-configurable data will be displayed.
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Source Address — This parameter shows source addresses which are members of this multicast address.
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Expiry Time — Displays the expiry time in hours:minutes:seconds since the entry was created in the cache table.
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Click Refresh to refresh the data on the screen with the present state of the data in the router.
Protocol Independent Multicast-Dense Mode (PIM-DM) protocol is a simple, protocol-independent multicast routing protocol. It uses an existing Unicast routing table and a Join/Prune/Graft mechanism to build a tree. PIM-DM creates source-based shortest-path distribution trees that make use of RPF. It cannot be used to build a shared distribution tree, as is the case in PIM-SM. PIM-DM assumes that when a sender starts sending data, all downstream routers and hosts want to receive a multicast datagram. PIM-DM initially floods multicast traffic throughout the network. Routers that do not have any downstream neighbors prune back the unwanted traffic. In addition to PRUNE messages, PIM-DM makes use of graft and assert messages. Graft messages are used whenever a new host wants to join the group. Assert messages are used to shutoff duplicate flows on the same multi-access network.
Protocol Independent Multicast-Sparse Mode (PIM-SM) is used to efficiently route multicast traffic to multicast groups that may span wide area networks and where bandwidth is a constraint. PIM-SM uses shared trees by default and implements source-based trees for efficiency. This data threshold rate is used to toggle between trees. PIM-SM assumes that no hosts want the multicast traffic unless they specifically ask for it. It creates a shared distribution tree centered on a defined rendezvous point (RP) from which source traffic is relayed to the receivers. Senders first send the multicast data to the RP, which in turn sends the data down the shared tree to the receivers. Shared trees centered on a RP do not necessarily provide the shortest/optimal path. In such cases, PIM-SM provides a means to switch to more efficient source-specific trees.
The PIM menu page contains links to web pages that define and display PIM-DM and PIM-SM parameters and data. Only one PIM protocol can be enabled on the switch at a time. To display the PIM page, click IPv4 Multicast→PIM or IPv6 Multicast →PIM in the tree view.
The PIM Global Configuration page contains the following fields:
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PIM Protocol — Select PIM-DM or PIM-SM. Only one PIM protocol can be enabled on the switch at a time. If you select PIM-SM, additional fields appear.
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Admin Mode — Select Enable or Disable from the drop-down menu to set the administrative status of PIM on the system. The default is Disable.
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Data Threshold Rate — If PIM-SM is selected as the protocol, enter the minimum source data rate in K bits/second above which the last-hop router switches to a source-specific shortest path tree. The valid values are from 0 to 2000 K bits/sec. The default value is 0. This field is not available for PIM-DM.
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Register Threshold Rate — If PIM-SM is selected as the protocol, enter the minimum source data rate in K bits/second above which the Rendezvous Point router switches to a source-specific shortest path tree. The valid values are from 0 to 2000 K bits/sec. The default value is 0. This field is not available for PIM-DM.
The PIM Global Status page contains the following fields:
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PIM Protocol — Select PIM-DM or PIM-SM. Only one PIM protocol can be enabled on the switch at a time. If you select PIM-SM, additional fields appear.
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Admin Mode — Displays the administrative status of the selected PIM protocol on the system.
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Data Threshold Rate — If PIM-SM is selected as the protocol, shows the minimum source data rate in Kbps above which the last-hop router switches to a source-specific shortest path tree.
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Register Threshold Rate — If PIM-SM is selected as the protocol, shows the minimum source data rate in Kbps above which the Rendezvous Point router switches to a source-specific shortest path tree.
The PIM Interface Configuration page contains the following fields:
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Interface — Select the interface for which data is to be displayed or configured. You must have configured at least one router interface before configuring or displaying data for a PIM interface, otherwise an error message is displayed.
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Admin Mode — Select Enable or Disable from the drop-down menu to set the administrative status of PIM for the selected interface. The default is Disable.
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Hello Interval — Enter the number of seconds between PIM hello messages transmitted from the selected interface. The default value is 30. Valid values are 0 to 65535 seconds.
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Join Prune Interval — Enter the frequency at which PIM Join/Prune messages are transmitted on this PIM interface. The valid values are from (0 to 65535). The default value is 60.
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BSR Border — Indicates whether this interface is enabled or disables to act as a border for all PIM bootstrap messages. Bootstrap messages do not cross the BSR border.
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DR Priority — The Designated Router priority value. The router with the highest priority value is elected as the Designated Router. A shared-media such as Ethernet may have multiple PIM-SM routers connected to it. A single one of these routers, the DR, acts on behalf of directly connected hosts with respect to the PIM protocol. This field is applicable for PIM-SM only. The valid values are 0 to 2147483647.
The PIM Interface Summary page contains the following fields:
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Interface — Select the interface for which data is to be displayed. There must be configured at least one router interface before displaying data for a PIM interface, otherwise an error message displays.
The Candidate RP Configuration page contains the following fields:
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RP Interface — Displays the interface for which the Candidate RP data is to be displayed. Slot 0 is the base unit.
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Group Address — Displays the group address transmitted in Candidate-RP-Advertisements.
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Group Mask — (IPv4) Displays the group address mask transmitted in Candidate-RP-Advertisements to fully identify the scope of the group which the router supports if it is elected as a Rendezvous Point.
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Prefix Length — (IPv6) Displays the group address prefix length transmitted in Candidate-RP-Advertisements to fully identify the scope of the group which the router will support if it is elected as a Rendezvous Point.
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Remove — Select this option and click Apply Changes to remove the specified Candidate RP Address for the PIM router.
The Static RP Configuration page contains the following fields:
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RP Address — Select the slot and port for which data is to be displayed. Slot 0 is the base unit.
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Group Address — Specify the group address transmitted in Candidate-RP-Advertisements in Prefix/Length format.
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Group Mask — (IPv4) The Group Mask of the RP to be created or deleted.
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Prefix Length — (IPv6) Specify the group address prefix length transmitted in Candidate-RP-Advertisements to fully identify the scope of the group which the router will support if elected as a Rendezvous Point.
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Remove — Select this box to remove the specified static RP IP Address for the PIM router.
The SSM Range Configuration page contains the following fields:
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SSM Group Address — Displays the Source-Specific Multicast (SSM) group IP address.
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SSM Group Mask — (IPv4) Displays the SSM group ip-address mask.
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SSM Prefix Length — (IPv6) Displays the source-specific multicast group Prefix Length.
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Remove — Select this option and click Apply Changes to remove the specified SSM Group IP Addresses for the PIM router.
To configure the SSM Range, click the Add button to display the SSM Range Configuration page. Enter values for the SSM Group Address and SSM Group Mask, click Apply Changes, then the Back button.
Use the Add SSM Range page to add the Source-Specific Multicast (SSM) Group IP Address and Group Mask (IPv4) or Prefix Length (IPv6) for the PIM router.
The BSR Candidate Configuration page contains the following fields:
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Interface — Select the interface for which data is to be displayed.
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Hash Mask Length — The CBSR hash mask length to be advertised in bootstrap messages if this interface is elected as the bootstrap router. This hash mask length will be used in the hash algorithm for selecting the RP for a particular group. The valid values are from 0 to 128.The default value is 126.
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Priority — The priority value for the local interface as a candidate bootstrap router. The valid values are from 0 to 255.The default value is 0.
