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    Monitoring LDP Neighbors

    Purpose

    Display LDP neighbor information.

    Action

    To display information about LDP neighbor 10.3.5.1:

    host1#show ldp neighbor 10.3.5.1
    LDP Neighbor: 10.0.2.2
      LSR: Remote 10.0.2.2:0, local 10.0.1.1:0
      Transport address: remote 10.0.2.2, local 10.0.1.1
      State: Operational
      LDP advertisement: Unsolicited
      Up for 00:20:03
      Number of next-hop addresses received = 3
        10.0.2.2  100.6.12.2  100.6.23.2
      Number of adjacencies = 1
        Link Hello adjacency: address 10.6.12.2, transport 10.0.2.2,
          Up for 00:20:09, remaining hold time: 11 sec

    To display brief information about all LDP neighbors:

    host1#show ldp neighbor brief
    Neighbor                 Transport Address   State
    10.0.2.2                10.0.1.1->80.0.2.2     Operational

    To display information about graceful restart for neighbors:

    host1#show ldp neighbor graceful-restart
    LDP Neighbor: 10.0.1.1
      Graceful Restart is disabled
      Helper Mode is enabled
      Reconnect Time: 0 msec
      Recovery Time: 0 msec
      State: operational
    LDP neighbor 10.0.2.2
      Graceful Restart is enabled
      Helper Mode is enabled
      Reconnect Time: 220000 msec
      Recovery Time: 0 msec
      State: operational

    To display information about LDP statistics for the session with each LDP neighbor:

    host1#show ldp neighbor statistics
    
    LDP Neighbor: 10.0.2.2
      Message type     Received   Sent
    ----------------   --------   ----
    Initialization            1      1
    Keepalive                85     85
    Notification              0      0
    Address                   1      1
    Address withdraw          0      0
    Label mapping             5      5
    Label request             0      0
    Label withdraw            2      2
    Label release             2      2

    Note: The mpls keyword is optional and is provided for compatibility with non–E Series implementations.

    Note: If a password is configured for a peer, you can view the password with the show configuration command. This command displays the passwords in cleartext unless the service password-encryption command has been issued, in which case the passwords are displayed in encrypted format.

    Meaning

    Table 1 lists the show ldp neighbor command output fields.

    Table 1: show ldp neighbor Output Fields

    Field Name

    Field Description

    LDP neighbor

    IP address of LDP peer

    LSR

    IP address of remote and local peers; the number following the colon is the platform label space ID, and is always 0

    Transport address

    Transport remote and local address for the TCP session

    State

    State of the session, nonexistent (session connection not established) or operational (has received keepalive message)

    LDP advertisement

    Mode of label distribution, downstream-unsolicited or downstream-on-demand

    Up

    Time that the adjacency has been up, in hh:mm:ss format

    Graceful Restart

    State of graceful restart, enabled or disabled

    Helper Mode

    State of graceful restart helper mode, enabled or disabled

    Reconnect Time

    Value for reconnect time received from peer in FT TLV, in milliseconds

    Recovery Time

    Value for recovery time received from peer in FT TLV, in milliseconds

    State

    Status of the neighbor’s graceful restart, one of the following:

    nonexistent

    LDP session is not established

    restarting

    Neighbor LSR is restarting

    recovering

    Session with neighbor LSR has reestablished after the neighbor restarted; label bindings are being exchanged

    operational

    LDP session is up

    Neighbor

    IP address of LDP peer

    Initialization

    Number of initialization messages received and sent

    Keepalive

    Number of keepalive messages received and sent

    Notification

    Number of notification messages received and sent

    Address

    Number of address messages received and sent

    Address withdraw

    Number of address withdraw messages received and sent

    Label mapping

    Number of label mapping messages received and sent

    Label request

    Number of label request messages received and sent

    Label withdraw

    Number of label withdraw messages received and sent

    Label release

    Number of label release messages received and sent

     

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    Published: 2014-08-18