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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 39 lists the show ldp neighbor command output fields.

Table 39: 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

Monitoring LDP Neighbors

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