Configuring LLDP, LLDP-MED, and Wired Location Service

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to http:/​/​www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

LLDP, LLDP-MED, and Wired Location Service Overview

LLDP

The Cisco Discovery Protocol (CDP) is a device discovery protocol that runs over Layer 2 (the data link layer) on all Cisco-manufactured devices (routers, bridges, access servers, switches, and controllers). CDP allows network management applications to automatically discover and learn about other Cisco devices connected to the network.

To support non-Cisco devices and to allow for interoperability between other devices, the switch supports the IEEE 802.1AB Link Layer Discovery Protocol (LLDP). LLDP is a neighbor discovery protocol that is used for network devices to advertise information about themselves to other devices on the network. This protocol runs over the data-link layer, which allows two systems running different network layer protocols to learn about each other.

LLDP Supported TLVs

LLDP supports a set of attributes that it uses to discover neighbor devices. These attributes contain type, length, and value descriptions and are referred to as TLVs. LLDP supported devices can use TLVs to receive and send information to their neighbors. This protocol can advertise details such as configuration information, device capabilities, and device identity.

The switch supports these basic management TLVs. These are mandatory LLDP TLVs.

  • Port description TLV

  • System name TLV

  • System description TLV

  • System capabilities TLV

  • Management address TLV

These organizationally specific LLDP TLVs are also advertised to support LLDP-MED.

  • Port VLAN ID TLV (IEEE 802.1 organizationally specific TLVs)

  • MAC/PHY configuration/status TLV (IEEE 802.3 organizationally specific TLVs)

LLDP and Cisco Switch Stacks

A switch stack appears as a single switch in the network. Therefore, LLDP discovers the switch stack, not the individual stack members.

LLDP and Cisco Medianet

When you configure LLDP or CDP location information on a per-port basis, remote devices can send Cisco Medianet location information to the switch. For information, go to
http:/​/​www.cisco.com/​en/​US/​docs/​ios/​netmgmt/​configuration/​guide/​nm_​cdp_​discover.html.

LLDP-MED

LLDP for Media Endpoint Devices (LLDP-MED) is an extension to LLDP that operates between endpoint devices such as IP phones and network devices such as switches. It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery, network policy, Power over Ethernet, inventory management and location information. By default, all LLDP-MED TLVs are enabled.

LLDP-MED Supported TLVs

LLDP-MED supports these TLVs:

  • LLDP-MED capabilities TLV

    Allows LLDP-MED endpoints to determine the capabilities that the connected device supports and has enabled.

  • Network policy TLV

    Allows both network connectivity devices and endpoints to advertise VLAN configurations and associated Layer 2 and Layer 3 attributes for the specific application on that port. For example, the switch can notify a phone of the VLAN number that it should use. The phone can connect to any switch, obtain its VLAN number, and then start communicating with the call control.

    By defining a network-policy profile TLV, you can create a profile for voice and voice-signaling by specifying the values for VLAN, class of service (CoS), differentiated services code point (DSCP), and tagging mode. These profile attributes are then maintained centrally on the switch and propagated to the phone.

  • Power management TLV

    Enables advanced power management between LLDP-MED endpoint and network connectivity devices. Allows switches and phones to convey power information, such as how the device is powered, power priority, and how much power the device needs.

    LLDP-MED also supports an extended power TLV to advertise fine-grained power requirements, end-point power priority, and end-point and network connectivity-device power status. LLDP is enabled and power is applied to a port, the power TLV determines the actual power requirement of the endpoint device so that the system power budget can be adjusted accordingly. The switch processes the requests and either grants or denies power based on the current power budget. If the request is granted, the switch updates the power budget. If the request is denied, the switch turns off power to the port, generates a syslog message, and updates the power budget. If LLDP-MED is disabled or if the endpoint does not support the LLDP-MED power TLV, the initial allocation value is used throughout the duration of the connection.

    You can change power settings by entering the power inline {auto [max max-wattage] | never | static [max max-wattage]} interface configuration command. By default the PoE interface is in auto mode; If no value is specified, the maximum is allowed (30 W).

  • Inventory management TLV

    Allows an endpoint to send detailed inventory information about itself to the switch, including information hardware revision, firmware version, software version, serial number, manufacturer name, model name, and asset ID TLV.

  • Location TLV

    Provides location information from the switch to the endpoint device. The location TLV can send this information:

    • Civic location information

      Provides the civic address information and postal information. Examples of civic location information are street address, road name, and postal community name information.

    • ELIN location information

      Provides the location information of a caller. The location is determined by the Emergency location identifier number (ELIN), which is a phone number that routes an emergency call to the local public safety answering point (PSAP) and which the PSAP can use to call back the emergency caller.

Wired Location Service

The switch uses the location service feature to send location and attachment tracking information for its connected devices to a Cisco Mobility Services Engine (MSE). The tracked device can be a wireless endpoint, a wired endpoint, or a wired switch or controller. The switch notifies the MSE of device link up and link down events through the Network Mobility Services Protocol (NMSP) location and attachment notifications.

The MSE starts the NMSP connection to the switch, which opens a server port. When the MSE connects to the switch there are a set of message exchanges to establish version compatibility and service exchange information followed by location information synchronization. After connection, the switch periodically sends location and attachment notifications to the MSE. Any link up or link down events detected during an interval are aggregated and sent at the end of the interval.

When the switch determines the presence or absence of a device on a link-up or link-down event, it obtains the client-specific information such as the MAC address, IP address, and username. If the client is LLDP-MED- or CDP-capable, the switch obtains the serial number and UDI through the LLDP-MED location TLV or CDP.

Depending on the device capabilities, the switch obtains this client information at link up:

  • Slot and port specified in port connection

  • MAC address specified in the client MAC address

  • IP address specified in port connection

  • 802.1X username if applicable

  • Device category is specified as a wired station

  • State is specified as new

  • Serial number, UDI

  • Model number

  • Time in seconds since the switch detected the association

Depending on the device capabilities, the switch obtains this client information at link down:

  • Slot and port that was disconnected

  • MAC address

  • IP address

  • 802.1X username if applicable

  • Device category is specified as a wired station

  • State is specified as delete

  • Serial number, UDI

  • Time in seconds since the switch detected the disassociation

When the switch shuts down, it sends an attachment notification with the state delete and the IP address before closing the NMSP connection to the MSE. The MSE interprets this notification as disassociation for all the wired clients associated with the switch.

If you change a location address on the switch, the switch sends an NMSP location notification message that identifies the affected ports and the changed address information.

Default LLDP Configuration

Table 1 Default LLDP Configuration

Feature

Default Setting

LLDP global state

Disabled

LLDP holdtime (before discarding)

120 seconds

LLDP timer (packet update frequency)

30 seconds

LLDP reinitialization delay

2 seconds

LLDP tlv-select

Disabled to send and receive all TLVs

LLDP interface state

Disabled

LLDP receive

Disabled

LLDP transmit

Disabled

LLDP med-tlv-select

Disabled to send all LLDP-MED TLVs. When LLDP is globally enabled, LLDP-MED-TLV is also enabled.

Restrictions for LLDP

  • If the interface is configured as a tunnel port, LLDP is automatically disabled.

  • If you first configure a network-policy profile on an interface, you cannot apply the switchport voice vlan command on the interface. If the switchport voice vlan vlan-id is already configured on an interface, you can apply a network-policy profile on the interface. This way the interface has the voice or voice-signaling VLAN network-policy profile applied on the interface.

  • You cannot configure static secure MAC addresses on an interface that has a network-policy profile.

How to Configure LLDP, LLDP-MED, and Wired Location Service

Enabling LLDP

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    lldp run

    4.    interface interface-id

    5.    lldp transmit

    6.    lldp receive

    7.    end

    8.    show lldp

    9.    copy running-config startup-config


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example: 
    Switch> enable
     

    Enables privileged EXEC mode. Enter your password if prompted.

     

    Step 2configure terminal


    Example: 
    
Switch# configure terminal
     

    Enters global configuration mode.

     
    Step 3lldp run


    Example: 
    
Switch (config)# lldp run
     

    Enables LLDP globally on the switch.

     
    Step 4interface interface-id


    Example: 
    
Switch (config)# interface 
gigabitethernet2/0/1
     

    Specifies the interface on which you are enabling LLDP, and enter interface configuration mode.

     
    Step 5lldp transmit


    Example: 
    
Switch(config-if)# lldp transmit
     

    Enables the interface to send LLDP packets.

     
    Step 6lldp receive


    Example: 
    
Switch(config-if)# lldp receive
     

    Enables the interface to receive LLDP packets.

     
    Step 7end


    Example: 
    
Switch(config-if)# end
     

    Returns to privileged EXEC mode.

     
    Step 8show lldp


    Example: 
    
Switch# show lldp
     

    Verifies the configuration.

     
    Step 9copy running-config startup-config


    Example: 
    Switch# copy running-config startup-config
     

    (Optional) Saves your entries in the configuration file.

     

    Configuring LLDP Characteristics

    You can configure the frequency of LLDP updates, the amount of time to hold the information before discarding it, and the initialization delay time. You can also select the LLDP and LLDP-MED TLVs to send and receive.


    Note

    Steps 2 through 5 are optional and can be performed in any order.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    lldp holdtime seconds

      4.    lldp reinit delay

      5.    lldp timer rate

      6.    lldp tlv-select

      7.    interface interface-id

      8.    lldp med-tlv-select

      9.    end

      10.    show lldp

      11.    copy running-config startup-config


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example: 
      Switch> enable
       

      Enables privileged EXEC mode. Enter your password if prompted.

       

      Step 2configure terminal


      Example: 
      
Switch# configure terminal
       

      Enters global configuration mode.

       
      Step 3lldp holdtime seconds


      Example: 
      
Switch(config)# lldp holdtime 120
       

      (Optional) Specifies the amount of time a receiving device should hold the information from your device before discarding it.

      The range is 0 to 65535 seconds; the default is 120 seconds.

       
      Step 4lldp reinit delay


      Example: 
      
Switch(config)# lldp reinit 2
       

      (Optional) Specifies the delay time in seconds for LLDP to initialize on an interface.

      The range is 2 to 5 seconds; the default is 2 seconds.

       
      Step 5lldp timer rate


      Example: 
      
Switch(config)# lldp timer 30
       

      (Optional) Sets the sending frequency of LLDP updates in seconds.

      The range is 5 to 65534 seconds; the default is 30 seconds.

       
      Step 6lldp tlv-select


      Example: 
      
Switch(config)# tlv-select
       

      (Optional) Specifies the LLDP TLVs to send or receive.

       
      Step 7interface interface-id


      Example: 
      
Switch (config)# interface 
gigabitethernet2/0/1
       

      Specifies the interface on which you are enabling LLDP, and enter interface configuration mode.

       
      Step 8lldp med-tlv-select


      Example: 
      
Switch (config-if)# lldp 
med-tlv-select inventory management
       

      (Optional) Specifies the LLDP-MED TLVs to send or receive.

       
      Step 9end


      Example: 
      
Switch (config-if)# end
       

      Returns to privileged EXEC mode.

       
      Step 10show lldp


      Example: 
      
Switch# show lldp
       

      Verifies the configuration.

       
      Step 11copy running-config startup-config


      Example: 
      Switch# copy running-config startup-config
       

      (Optional) Saves your entries in the configuration file.

       

      Configuring LLDP-MED TLVs

      By default, the switch only sends LLDP packets until it receives LLDP-MED packets from the end device. It then sends LLDP packets with MED TLVs, as well. When the LLDP-MED entry has been aged out, it again only sends LLDP packets.

      By using the lldp interface configuration command, you can configure the interface not to send the TLVs listed in the following table.

      Table 2 LLDP-MED TLVs

      LLDP-MED TLV

      Description

      inventory-management

      LLDP-MED inventory management TLV

      location

      LLDP-MED location TLV

      network-policy

      LLDP-MED network policy TLV

      power-management

      LLDP-MED power management TLV

      Follow these steps to enable a TLV on an interface:

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    interface interface-id

        4.    lldp med-tlv-select

        5.    end

        6.    copy running-config startup-config


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example: 
        Switch> enable
         

        Enables privileged EXEC mode. Enter your password if prompted.

         

        Step 2configure terminal


        Example: 
        
Switch# configure terminal
         

        Enters global configuration mode.

         
        Step 3interface interface-id


        Example: 
        
Switch (config)# interface 
gigabitethernet2/0/1
         

        Specifies the interface on which you are enabling LLDP, and enter interface configuration mode.

         
        Step 4lldp med-tlv-select


        Example: 
        
Switch(config-if)# lldp med-tlv-select 
inventory management
         

        Specifies the TLV to enable.

         
        Step 5end


        Example: 
        
Switch(config-if)# end
         

        Returns to privileged EXEC mode.

         
        Step 6copy running-config startup-config


        Example: 
        Switch# copy running-config startup-config
         

        (Optional) Saves your entries in the configuration file.

         

        Configuring Network-Policy TLV

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    network-policy profile profile number

          4.    {voice | voice-signaling} vlan [vlan-id {cos cvalue | dscp dvalue}] | [[dot1p {cos cvalue | dscp dvalue}] | none | untagged]

          5.    exit

          6.    interface interface-id

          7.    network-policy profile number

          8.    lldp med-tlv-select network-policy

          9.    end

          10.    show network-policy profile

          11.    copy running-config startup-config


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example: 
          Switch> enable
           

          Enables privileged EXEC mode. Enter your password if prompted.

           

          Step 2configure terminal


          Example: 
          
Switch# configure terminal
           

          Enters global configuration mode.

           
          Step 3network-policy profile profile number


          Example: 
          
Switch(config)# network-policy profile 1
           

          Specifies the network-policy profile number, and enter network-policy configuration mode. The range is 1 to 4294967295.

           
          Step 4{voice | voice-signaling} vlan [vlan-id {cos cvalue | dscp dvalue}] | [[dot1p {cos cvalue | dscp dvalue}] | none | untagged]

          Example: 
          Switch(config-network-policy)# voice vlan 100 cos 4
           

          Configures the policy attributes:

          • voice—Specifies the voice application type.

          • voice-signaling—Specifies the voice-signaling application type.

          • vlan—Specifies the native VLAN for voice traffic.

          • vlan-id—(Optional) Specifies the VLAN for voice traffic. The range is 1 to 4094.

          • cos cvalue—(Optional) Specifies the Layer 2 priority class of service (CoS) for the configured VLAN. The range is 0 to 7; the default is 5.

          • dscp dvalue—(Optional) Specifies the differentiated services code point (DSCP) value for the configured VLAN. The range is 0 to 63; the default is 46.

          • dot1p—(Optional) Configures the telephone to use IEEE 802.1p priority tagging and use VLAN 0 (the native VLAN).

          • none—(Optional) Do not instruct the IP telephone about the voice VLAN. The telephone uses the configuration from the telephone key pad.

          • untagged—(Optional) Configures the telephone to send untagged voice traffic. This is the default for the telephone.

          • untagged—(Optional) Configures the telephone to send untagged voice traffic. This is the default for the telephone.

           
          Step 5exit


          Example: 
          
Switch(config)# exit
           

          Returns to global configuration mode.

           
          Step 6interface interface-id


          Example: 
          
Switch (config)# interface gigabitethernet2/0/1
           

          Specifies the interface on which you are configuring a network-policy profile, and enter interface configuration mode.

           
          Step 7network-policy profile number


          Example: 
          
Switch(config-if)# network-policy 1
           

          Specifies the network-policy profile number.

           
          Step 8lldp med-tlv-select network-policy


          Example: 
          Switch(config-if)# lldp med-tlv-select network-policy
           

          Specifies the network-policy TLV.

           
          Step 9end


          Example: 
          
Switch(config)# end
           

          Returns to privileged EXEC mode.

           
          Step 10show network-policy profile


          Example: 
          
Switch# show network-policy profile
           

          Verifies the configuration.

           
          Step 11copy running-config startup-config


          Example: 
          Switch# copy running-config startup-config
           

          (Optional) Saves your entries in the configuration file.

           

          Configuring Location TLV and Wired Location Service

          Beginning in privileged EXEC mode, follow these steps to configure location information for an endpoint and to apply it to an interface.

          SUMMARY STEPS

            1.    configure terminal

            2.    location {admin-tag string | civic-location identifier {id | host} | elin-location string identifier id | custom-location identifier {id | host} | geo-location identifier {id | host}}

            3.    exit

            4.    interface interface-id

            5.    location {additional-location-information word | civic-location-id {id | host} | elin-location-id id | custom-location-id {id | host} | geo-location-id {id | host} }

            6.    end

            7.    Use one of the following:

            • show location admin-tag string

            • show location civic-location identifier id

            • show location elin-location identifier id

            8.    copy running-config startup-config


          DETAILED STEPS
             Command or ActionPurpose
            Step 1configure terminal


            Example:
            
Switch# configure terminal
             

            Enters global configuration mode.

             
            Step 2location {admin-tag string | civic-location identifier {id | host} | elin-location string identifier id | custom-location identifier {id | host} | geo-location identifier {id | host}}


            Example:
            Switch(config)# location civic-location identifier 1

            Switch(config-civic)# number 3550
            Switch(config-civic)# primary-road-name "Cisco Way"
            Switch(config-civic)# city "San Jose"
            Switch(config-civic)# state CA
            Switch(config-civic)# building 19
            Switch(config-civic)# room C6
            Switch(config-civic)# county "Santa Clara"
            Switch(config-civic)# country US
             

            Specifies the location information for an endpoint.

            • admin-tag—Specifies an administrative tag or site information.

            • civic-location—Specifies civic location information.

            • elin-location—Specifies emergency location information (ELIN).

            • custom-location—Specifies custom location information.

            • geo-location—Specifies geo-spatial location information.

            • identifier id—Specifies the ID for the civic, ELIN, custom, or geo location.

            • host—Specifies the host civic, custom, or geo location.

            • string—Specifies the site or location information in alphanumeric format.

             
            Step 3exit


            Example:
            
Switch(config-civic)# exit
             

            Returns to global configuration mode.

             
            Step 4interface interface-id


            Example:
            
Switch (config)# interface gigabitethernet2/0/1
             

            Specifies the interface on which you are configuring the location information, and enter interface configuration mode.

             
            Step 5location {additional-location-information word | civic-location-id {id | host} | elin-location-id id | custom-location-id {id | host} | geo-location-id {id | host} }


            Example:
            
Switch(config-if)# location elin-location-id 1
             

            Enters location information for an interface:

            • additional-location-information—Specifies additional information for a location or place.

            • civic-location-id—Specifies global civic location information for an interface.

            • elin-location-id—Specifies emergency location information for an interface.

            • custom-location-id—Specifies custom location information for an interface.

            • geo-location-id—Specifies geo-spatial location information for an interface.

            • host—Specifies the host location identifier.

            • word—Specifies a word or phrase with additional location information.

            • id—Specifies the ID for the civic, ELIN, custom, or geo location. The ID range is 1 to 4095.

             
            Step 6end


            Example:
            
Switch(config-if)# end
             

            Returns to privileged EXEC mode.

             
            Step 7Use one of the following:
            • show location admin-tag string

            • show location civic-location identifier id

            • show location elin-location identifier id


            Example:
            
Switch# show location admin-tag

            or

            
Switch# show location civic-location 
identifier

            or

            
Switch# show location elin-location 
identifier
             

            Verifies the configuration.

             
            Step 8copy running-config startup-config


            Example:
            
Switch# copy running-config 
startup-config
             

            (Optional) Saves your entries in the configuration file.

             

            Enabling Wired Location Service on the Switch

            Before You Begin

            For wired location to function, you must first enter the ip device tracking global configuration command.

            SUMMARY STEPS

              1.    enable

              2.    configure terminal

              3.    nmsp notification interval {attachment | location} interval-seconds

              4.    end

              5.    show network-policy profile

              6.    copy running-config startup-config


            DETAILED STEPS
               Command or ActionPurpose
              Step 1 enable


              Example: 
              Switch> enable
               

              Enables privileged EXEC mode. Enter your password if prompted.

               

              Step 2configure terminal


              Example: 
              
Switch# configure terminal
               

              Enters global configuration mode.

               
              Step 3nmsp notification interval {attachment | location} interval-seconds


              Example: 
              
Switch(config)# nmsp notification interval location 10
               

              Specifies the NMSP notification interval.

              attachment—Specifies the attachment notification interval.

              location—Specifies the location notification interval.

              interval-seconds—Duration in seconds before the switch sends the MSE the location or attachment updates. The range is 1 to 30; the default is 30.

               
              Step 4end


              Example: 
              
Switch(config)# end
               

              Returns to privileged EXEC mode.

               
              Step 5show network-policy profile


              Example: 
              Switch# show network-policy profile
               

              Verifies the configuration.

               
              Step 6copy running-config startup-config


              Example: 
              
Switch# copy running-config startup-config
               

              (Optional) Saves your entries in the configuration file.

               

              Configuration Examples for LLDP, LLDP-MED, and Wired Location Service

              Configuring Network-Policy TLV: Examples

              This example shows how to configure VLAN 100 for voice application with CoS and to enable the network-policy profile and network-policy TLV on an interface:

              Switch# configure terminal
Switch(config)# network-policy 1
Switch(config-network-policy)# voice vlan 100 cos 4
Switch(config-network-policy)# exit
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# network-policy profile 1
Switch(config-if)# lldp med-tlv-select network-policy

              This example shows how to configure the voice application type for the native VLAN with priority tagging:

              
Switchconfig-network-policy)# voice vlan dot1p cos 4
Switchconfig-network-policy)# voice vlan dot1p dscp 34

              Monitoring and Maintaining LLDP, LLDP-MED, and Wired Location Service

              Commands for monitoring and maintaining LLDP, LLDP-MED, and wired location service.

              Command

              Description

              clear lldp counters

              Resets the traffic counters to zero.

              clear lldp table

              Deletes the LLDP neighbor information table.

              clear nmsp statistics

              Clears the NMSP statistic counters.

              show lldp

              Displays global information, such as frequency of transmissions, the holdtime for packets being sent, and the delay time before LLDP initializes on an interface.

              show lldp entry entry-name

              Displays information about a specific neighbor.

              You can enter an asterisk (*) to display all neighbors, or you can enter the neighbor name.

              show lldp interface [interface-id]

              Displays information about interfaces with LLDP enabled.

              You can limit the display to a specific interface.

              show lldp neighbors [interface-id] [detail]

              Displays information about neighbors, including device type, interface type and number, holdtime settings, capabilities, and port ID.

              You can limit the display to neighbors of a specific interface or expand the display for more detailed information.

              show lldp traffic

              Displays LLDP counters, including the number of packets sent and received, number of packets discarded, and number of unrecognized TLVs.

              show location admin-tag string

              Displays the location information for the specified administrative tag or site.

              show location civic-location identifier id

              Displays the location information for a specific global civic location.

              show location elin-location identifier id

              Displays the location information for an emergency location

              show network-policy profile

              Displays the configured network-policy profiles.

              show nmsp

              Displays the NMSP information

              Additional References for LLDP, LLDP-MED, and Wired Location Service

              Error Message Decoder

              Description Link

              To help you research and resolve system error messages in this release, use the Error Message Decoder tool.

              https:/​/​www.cisco.com/​cgi-bin/​Support/​Errordecoder/​index.cgi

              MIBs

              MIB MIBs Link

              All supported MIBs for this release.

              To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

              http:/​/​www.cisco.com/​go/​mibs

              Technical Assistance

              Description Link

              The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

              To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

              Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

              http:/​/​www.cisco.com/​support

              Feature Information for LLDP, LLDP-MED, and Wired Location Service

              Release

              Modification

              Cisco IOS 15.0(2)EX1

              This feature was introduced.