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Monitoring LDP

Purpose

Display information about LDP.

Action

To display LDP information:

host1#show ldp
LDP
  LSR ID is 80.0.0.2
  FEC Deaggregation is off
  Egress label: implicit-null
  Label distribution control mode: ordered control
  LDP session retry  0 times at interval 10
  LDP session hold time: 180
  LDP session keepalive interval: 20
  LDP targeted-hello hold time: 45
  LDP targeted-hello interval: 15
  Topology Driven LSP enabled 
  LSPs used for IP forwarding
      for host addresses only

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

Meaning

Table 34 lists the show ldp command output fields.

Table 34: show ldp Output Fields

Field Name	Field Description
LSR ID	IP address of label-switched router
FEC Deaggregation	State of FEC deaggregation, on or off
Egress label	Type of label advertised for the LSR that is the egress router for the prefix, implicit null, explicit null, or a non-null label
Label distribution control mode	Label distribution control mode used by LDP for label distribution, independent control, or ordered control
LDP session retry	Configured values for the number of LDP session retry attempts and the retry interval
LDP session hold time	Configured value for the LDP session hold time
LDP session keepalive interval	Interval at which LDP sends session keepalive messages, in seconds
LDP targeted-hello hold time	LDP targeted-hello hold time, in seconds
LDP targeted-hello interval	LDP targeted-hello interval, in seconds
Topology Driven LSP	Status of topology-driven LSP, enabled or disabled
LSPs used for IP forwarding	LSPs are placed in the IP routing table for forwarding plain IP traffic; displayed only when the mpls ldp ip-forwarding command has been configured. Indicates whether the LSPs that are used for IP forwarding are host only, subject to a specified access list, or subject to a specified prefix list.
LDP proto stats	LDP protocol statistics
totalPeersDiscovered	Number of LDP peers discovered
totalAdjacenciesEstablished	Number of LDP adjacencies established
totalSessionsEstablished	Number of LDP sessions established
totalFECElements	Number of FEC elements
totalFECs	Number of FECs
totalInLabels	Number of in labels (sent to upstream neighbor)
totalOutLabels	Number of out labels (received from downstream neighbor)
totalCrLSPSetup	Number of constraint-based routed LSPs set up
totalCrLSPDeleted	Number of constraint-based routed LSPs deleted

Monitoring LDP

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