Power over Ethernet (PoE) provides power to devices over existing LAN cabling without the need to update or modify the network infrastructure. When you use PoE, you do not need to locate network devices next to power sources. Some of the devices that can use PoE as a power source include IP Phones, Wireless Access Points, IP Gateways, PDAs, and Remote audio and video monitoring devices.
This section explains the PoE options available from the System®General®Power Over Ethernet menu page. These options include configuring and viewing PoE information for the system or for each interface. The Power Over Ethernet menu page provides access to these options through the following menu pages:
Use the Global Configurationpage to configure and view the system-wide PoE parameters, which includes system usage, traps, and legacy PoE support.
To display the page, click System®General®Power Over Ethernet®Global Configuration in the tree view.
Figure 7-1. Global Configuration
The Global Configuration page contains the following fields:
Unit — Identifies the unit in the stack.
Power Status — The operational status of the inline power sourcing equipment.
Nominal Power — The nominal power of the inline power sourcing equipment in Watts.
Consumed Power — Measured usage power in Watts.
System Usage Threshold — The usage threshold expressed in percents for comparing the measured power and initiating an alarm if threshold is exceeded.
Traps — Indicates if inline power traps are enabled or disabled.
Legacy Support — Enable or disable support for legacy PoE devices.
Configuring Global PoE Settings
Open the Global Configurationpage.
Configure the system usage threshold, traps, or legacy PoE support.
Click Apply Changes.
The system parameters are applied, and the device is updated.
Configuring PoE Using CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
Power Over Ethernet Commands
Interface Configuration
Use the Interface Configurationpage to configure and view the PoE parameters for each port.
To display the page, click System®General®Power Over Ethernet®Interface Configuration in the tree view.
Figure 7-2. Interface Configuration
The Interface Configuration page contains the following fields:
Ports — Specifies the Unit and Port for which port parameters are defined.
PoE Admin Status — Indicates if the port is enabled to provide power.
Auto — The port automatically provides power to an attached PoE-capable device.
Never — The port does not provide power to any attached device.
PoE Operational Status — Describes the inline power operational status of the port. The operational status can be one of the following:
Off — indicates no power being delivered.
On — indicates power is being drawn by device.
Test-Fail — indicates a problem with the port.
Testing — indicates port in test mode.
Fault — indicates port is idle due to error condition.
Searching — indicates port is not in one of the above states.
Power Priority Level — The priority of the port from the point of view of inline power management. The power priority can be one of the following levels:
Critical
High
Low
Power Classification — The power consumption range of the powered device. The power classification can be one of the following classes:
Class 0(0.44–12.95)
Class 1(0.44–3.84)
Class 2(3.84–6.49)
Class 3(6.49–12.95).
Powered Device — Description of the powered device type, which can be up to 24 characters.
Overload Counter — Counts the number of overload conditions that have been detected.
Short Counter — Counts the number of short conditions that have been detected.
Denied Counter — Counts the number of times power has been denied.
Absent Counter — Counts the number of times power has been removed because a powered device dropout was detected.
Invalid Signature Counter — Counts the number of times an invalid signature of a powered device was detected.
Configuring PoE Settings for an Interface
Open the Interface Configurationpage.
Select the unit and port to configure.
Configure the administrative status, power priority, or name of the device the port powers.
Click Apply Changes.
The system parameters are applied, and the device is updated.
Displaying the Power Over Ethernet Table
Open the Interface Configuration page.
Click ShowAll.
The Power Over Ethernet Table page displays and provides summary PoE information for all interfaces:
Figure 7-3. Power Over Ethernet Table
Configuring PoE Using CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
Power Over Ethernet Commands
Configuring Link Layer Discovery Protocol (LLDP) for Media
Endpoint Devices
The IEEE 802.1AB standard, which describes the Link Layer Discovery Protocol (LLDP), formalizes the discovery and capability retrieval of elements in a data network in a LAN/MAN environment. The information exchanged is stored in MIBs, and the information is accessible by a network management system (NMS) like SNMP. This framework is extensible and allows advanced utilization is areas like VoIP networks.
The Link Layer Discovery Protocol for Media Endpoint Devices (LLDP-MED) provides an extension to the LLDP standard for network configuration and policy, device location, Power over Ethernet management, and inventory management.
LLDP-MED uses LLDP's organizationally-specific TLV extensions and defines new TLVs that make it easier for a VoIP deployment in a wired or wireless LAN/MAN environment. It also makes mandatory a few optional TLVs from LLDP and recommends not transmitting some TLVs.
Since LLDP-MED uses the framework of LLDP, it is bound by the same requirements of the original specification. The frame format, restrictions and implications are all preserved.
The TLVs only communicate information; these TLVs do not automatically translate into configuration. An external application may query the MED MIB and take management actions in configuring functionality.
The LLDP-MEDmenu page contains links to the following features:
Use the LLDP-MED Global Configuration page to change or view the LLDP-MED parameters that affect the entire system.
To display the LLDP-MED Global Configurationpage, click Switching® LLDP®LLDP-MED®LLDP-MED Global Configurationin the tree view.
Figure 7-4. LLDP-MED Global Configuration
The LLDP-MED Global Configuration page contains the following fields:
Fast Start Repeat Count — Specifies the number of LLDP PDUs that will be transmitted when the protocol is enabled. The range is from (1 to 10). Default value of fast repeat count is 4.
Device Class — Specifies local device's MED Classification. There are four different kinds of devices, three of them represent the actual end points (classified as Class I Generic [IP Communication Controller etc.], Class II Media [Conference Bridge etc.], Class III Communication [IP Telephone etc.]). The fourth device is Network Connectivity Device, which is typically a LAN Switch/Router, IEEE 802.1 Bridge, IEEE 802.11 Wireless Access Point, and so on.
Modifying the LLDP-MED Global Configuration
Open the LLDP Configurationpage.
Enter a new value for the Fast Start Repeat Count.
Click Apply Changes.
LLDP-MED parameters are saved to the switch.
Configuring LLDP-MED Global Settings with CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
LLDP Commands
LLDP-MED Interface Configuration
Use the LLDP-MED Interface Configuration page to specify LLDP-MED parameters that affect a specific interface.
To display the LLDP-MED Interface Configurationpage, click Switching® LLDP®LLDP-MED®LLDP-MED Interface Configurationin the tree view.
Figure 7-5. LLDP-MED Interface Configuration
The LLDP-MED Interface Configuration page contains the following fields:
Interface — Specifies the list of ports on which LLDP-MED - 802.1AB can be configured. Select All from the Port drop-down lost to configure all interfaces on the system with the same LLDP-MED settings.
NOTE: When you select All from the Port field, the page displays the LLDP-MED mode and Notification mode as "Disabled," and all Transmit TLVs check boxes are cleared. This occurs even if you configure all ports with the same settings. Select a specific interface or click Show All to view interface LLDP-MED settings.
LLDP-MED Mode — Specifies the Link Layer Data Protocol-Media End Point (LLDP-MED) mode for the selected interface. Enabling MED effectively enables the transmit and receive function of LLDP.
Config Notification Mode — Specifies the LLDP-MED topology notification mode for the selected interface.
Transmit TLVs — Specifies which optional type length values (TLVs) in the LLDP-MED will be transmitted in the LLDP PDUs frames for the selected interface.
MED Capabilities — To transmit the capabilities TLV in LLDP frames.
Network Policy — To transmit the network policy TLV in LLDP frames.
Location Identification — To transmit the location TLV in LLDP frames.
Extended Power via MDI - PSE — To transmit the extended PSE TLV in LLDP frames.
Extended Power via MDI - PD — To transmit the extended PD TLV in LLDP frames.
Inventory — To transmit the inventory TLV in LLDP frames.
Modifying the LLDP-MED Interface Configuration
Open the LLDP Configurationpage.
Specify the unit and select a port to configure, or select All to configure all ports with the
same settings.
Configure the LLDP-MED settings for the interface or interfaces
Click Apply Changes.
LLDP-MED parameters are saved to the switch.
NOTE: If you configured All ports, the settings you applied will not display after the page updates. Select a specific interface or click Show All to view interface LLDP-MED settings.
Displaying the Interface Summary
Open the LLDP-MED Interface Configuration page.
Click ShowAll.
The LLDP-MED Interface Summary page displays and provides summary LLDP-MED information for all interfaces:
Figure 7-6. LLDP-MED Interface Summary
Configuring LLDP-MED Interface Settings with CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
LLDP Commands
LLDP-MED Local Device Information
Use the LLDP-MED Local Device Information page to view the advertised LLDP local data for each port.
To display the LLDP-MED Local Device Informationpage, click Switching® LLDP®LLDP-MED®LLDP-MED Local Device Information in the tree view.
Figure 7-7. LLDP-MED Local Device Information
The LLDP-MED Local Device Information page contains the following fields:
Port — Select the unit and port to display the LLDP local data advertised by the port. The port drop-down list contains only the ports with LLDP-MED enabled.
Network Policies Information — If a network policy TLV is present in the LLDP frames, the following information displays:
Network Application — Specifies the type of media application the local device advertises in the policy. A port may receive one or more types, which include the following:
unknown
voicesignaling
guestvoice
guestvoicesignalling
softphonevoice
videoconferencing
streammingvideo
videosignalling
Vlan Id — Specifies the VLAN ID associated with a particular policy type.
Priority — Specifies the priority associated with a particular policy type.
DSCP — Specifies the DSCP associated with a particular policy type.
Unknown Bit Status — Specifies the unknown bit associated with a particular policy type.
Tagged Bit Status — Specifies the tagged bit associated with a particular policy type.
Inventory — If an inventory TLV is present in LLDP frames, the following information displays:
Hardware Revisions — Specifies hardware version.
Firmware Revisions — Specifies Firmware version.
Software Revisions — Specifies Software version.
Serial Number — Specifies serial number.
Manufacturer Name — Specifies manufacturers name.
Model Name — Specifies model name.
Asset ID — Specifies asset id.
Location Information — If a location TLV is present in LLDP frames, the following information displays:
Sub Type — Specifies type of location information.
Location Information — Specifies the location information as a string for given type of location id.
Extended PoE — If the local device is a PoE device, the following information displays:
Device Type — Specifies power device type.
Extended PoE PSE — If an extended PSE TLV is present in LLDP frame, the following information displays:
Available — Specifies available power sourcing equipment's power value in tenths of watts on the port of local device.
Source — Specifies power source of this port.
Priority — Specifies PSE port power priority.
Extended PoE PD — If an extended PD TLV is present in LLDP frame, the following information displays:
Required — Specifies required power device power value in tenths of watts on the port of local device.
Source — Specifies power source of this port.
Priority — Specifies PD port power priority.
Viewing LLDP-MED Local Device Information with CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
LLDP Commands
LLDP-MED Remote Device Information
Use the LLDP-MED Remote Device Information page to view the advertised LLDP data advertised by remote devices.
To display the LLDP-MED Remote Device Informationpage, click Switching® LLDP®LLDP-MED®LLDP-MED Remote Device Information in the tree view.
Figure 7-8. LLDP-MED Remote Device Information
The LLDP-MED Remote Device Information page contains the following fields:
Local Interface — Specifies the list of all the ports on which LLDP-MED is enabled.
Capability Information — Specifies the supported and enabled capabilities that was received in MED TLV on this port.
Supported Capabilities — Specifies supported capabilities that was received in MED TLV on this port.
Enabled Capabilities — Specifies enabled capabilities that was received in MED TLV on this port.
Device Class — Specifies device class as advertised by the device remotely connected to the port.
Network Policy Information —If a network policy TLV is received in the LLDP frames on this port, the following information displays:
Network Application — Specifies the type of media application that the local device advertises in the policy. A port may receive one or more application types, which include the following types:
unknown
voicesignaling
guestvoice
guestvoicesignalling
softphonevoice
videoconferencing
streammingvideo
videosignalling
Vlan Id — Specifies the VLAN ID associated with a particular policy type.
Priority — Specifies the priority associated with a particular policy type.
DSCP — Specifies the DSCP associated with a particular policy type.
Unknown Bit Status — Specifies the unknown bit associated with a particular policy type.
Tagged Bit Status — Specifies the tagged bit associated with a particular policy type.
Inventory — If an inventory TLV is present in LLDP frames, the following information displays:
Hardware Revisions — Specifies the hardware version of the remote device.
Firmware Revisions — Specifies the firmware version of the remote device.
Software Revisions — Specifies the software version of the remote device.
Serial Number — Specifies the serial number of the remote device.
Manufacturer Name — Specifies the manufacturer's name of the remote device.
Model Name — Specifies the model name of the remote device.
Asset ID — Specifies the asset ID of the remote device.
Location Information — If a location TLV is present in LLDP frames, the following information displays:
Sub Type — Specifies type of location information.
Location Information — Specifies the location information as a string for given type of location id.
Extended PoE — Specifies if remote device is a PoE device.
Device Type — Specifies remote device's PoE device type connected to this port.
Extended PoE PSE — If an extended PSE TLV is received in the LLDP frame on this port, the following information displays:
Available — Specifies the remote ports PSE power value in tenths of watts.
Source — Specifies the remote port's PSE power source.
Priority — Specifies the remote ports PSE power priority.
Extended PoE PD — If an extended PD TLV is received in the LLDP frame on this port, the following information displays:
Required — Specifies the remote port's PD power requirement.
Source — Specifies the remote port's power source.
Priority — Specifies the remote port's PD power priority.
Viewing LLDP-MED Remote Device Information with CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
LLDP Commands
Configuring Ports for Voice VLAN
The Voice VLAN feature enables switch ports to carry voice traffic with defined priority. The priority level enables the separation of voice and data traffic coming onto the port. A primary benefit of using Voice VLAN is to ensure that the sound quality of an IP phone is safeguarded from deteriorating when the data traffic on the port is high. The system uses the source MAC address of the traffic traveling through the port to identify the IP phone data flow.
The Voice VLAN page contains a link for configuring global and port voice VLAN settings.
Voice VLAN Configuration
Use the Voice VLAN Configurationpage to configure and view voice VLAN settings that apply to the entire system and to specific interfaces.
To display the page, click Switching®Voice VLAN®Voice VLAN Configuration in the tree view.
Figure 7-9. Voice VLAN Configuration
The Voice VLAN Configuration page contains the following fields:
Voice VLAN Admin Mode — Select the administrative mode for Voice VLAN for the switch from the drop-down menu. The default is disable.
Port — Select the interface to view or configure.
Voice VLAN Interface Mode —Select the Voice VLAN mode for selected interface. The default is disable. The mode can be one of the following:
Disable — Disable voice VLAN on the port.
None — Allow the IP phone to use its own configuration to send untagged voice traffic.
VLAN ID — Configure VLAN tagging for the voice traffic. The VLAN ID range is 1–4093.
dot1p — Configure Voice VLAN 802.1p priority tagging for voice traffic. The priority tag range is 0–7.
Untagged — Configure the phone to send untagged voice traffic.
CoS Override Mode — Select the Cos Override mode for selected interface. The default is disable.
Operational State — This is the operational status of the voice VLAN on the given interface.
Configuring Voice VLAN Settings
Open the Voice VLAN Configurationpage.
Configure the settings for the system or for each port.
Click Apply Changes.
The system parameters are applied, and the device is updated.
Configuring Voice VLAN Using CLI Commands
For information about the CLI commands that perform this function, see the following chapter in the CLI Reference Guide:
