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    Link Layer Discovery Protocol (LLDP) Snooping

    BTI7800 transport interfaces configured for Ethernet (10ge and 100ge) can be provisioned to snoop Link Layer Discovery Protocol (LLDP) frames to gather information about attached equipment. This information can then be accessed via the CLI or NETCONF and used to identify neighbor devices.

    Note: LLDP snooping is supported starting with release 4.1.

    Figure 1: LLDP Snooping

    LLDP Snooping

    LLDP data units, which are sent inside Ethernet frames at fixed intervals and identified by their destination Media Access Control (MAC) address and EtherType, carry device information in mandatory and optional type–length values (TLVs). Mandatory TLVs include device information such as chassis and port identification and system capabilities.

    Configuring LLDP Snooping on an Ethernet Interface

    Use this procedure to enable or disable LLDP snooping on an Ethernet interface (10ge or 100ge).

    Note: LLDP snooping is supported in the receive direction only and is disabled by default.

    1. Enter configuration mode.
      bti7800# config
      bti7800(config)#
    2. Configure LLDP snooping on an Ethernet interface.

      For example, to enable LLDP snooping:

      bti7800(config)# interface 10ge:1/2/1/1/1 lldp-snoop enable
      bti7800(config-interface-10ge:1/2/1/1/1)# commit 
      Commit complete. 

      To disable LLDP snooping:

      bti7800(config)# interface 10ge:1/2/1/1/1 lldp-snoop disable
      bti7800(config-interface-10ge:1/2/1/1/1)# commit 
      Commit complete. 
    3. Repeat the previous step for each Ethernet interface for which you want to configure LLDP snooping.
    4. Use the following show commands to either confirm the configuration changes or retrieve LLDP data.
      • show interface lldp table to retrieve a listing of all interfaces on which LLDP snooping is enabled.
      • show interface lldp name:identifier to retrieve LLDP neighbor data for an LLDP-enabled interface.
      • show interface name:identifier to view the value ( enabled or disabled ) of the LLDP snooping parameter for the specified interface.

    Supported LLDP TLVs

    BTI7800 only supports mandatory LLDP TLVs (Table 1), which provide information about a network-attached device (neighbor) for an LLDP-enabled Ethernet interface.

    Table 1: Mandatory LLDP TLVs

    TLV

    Description

    Range

    Time to Live

    The amount of time (in seconds) that received LLDP data units will be retained

    0 to 65,535

    Chassis ID Type

    Chassis identifier type

    • chassis-component
    • interface-alias
    • port-component
    • mac-address
    • network-address
    • interface-name
    • local

    Chassis ID

    Chassis identifier as per chassis identifier type

    String (1 to 255 characters)

    Port ID Type

    Port identifier type

    • interface-alias
    • port-component
    • mac-address
    • network-address
    • interface-name
    • agent-circuit-id
    • local

    Port ID

    Port identifier as per port identifier type

    String (1 to 255 characters)

    Port Description

    Port description (text)

    String (0 to 255 characters)

    System Name

    Administratively assigned system name

    String (0 to 255 characters)

    System Description

    System description (text)

    String (0 to 255 characters)

    System Capabilities Supported

    Supported system capabilities

    List containing any of the following:

    • repeater
    • bridge
    • vlan-access-point
    • router
    • telephone
    • docsis-cable-device
    • station-only
    • other
    • ip-v4
    • ip-v6
    • other

    System Capabilities Enabled

    Enabled system capabilities

    Management Address Type

    Management address identifier type

    • ip-v4
    • ip-v6
    • other

    Management Address

    Management address as per identifier type

    String (0 to 255 characters)

    Management Interface Subtype

    Management interface number subtype

    • if-index
    • system-port-number
    • unknown

    Management Interface Number

    Interface number that identifies the specific interface associated with the management address

    32-bit integer

    Management Interface OID

    Object identifier (OID) that identifies the entity associated with the management address

    String (OID format)

    Release History Table

    Release
    Description
    LLDP snooping is supported starting with release 4.1.

    Modified: 2017-10-24