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show ldp overview

Syntax

Syntax (EX Series Switch and QFX Series)

Description

Display LDP overview information.

Options

none

Display standard overview information about LDP for all routing instances.
instance instance-name

(Optional) Display LDP overview information for the specified routing instance.
logical-system (all | logical-system-name)

(Optional) Display LDP information from systems or a particular logical system on the devices. This option is only supported on Junos OS.

Required Privilege Level

view

Output Fields

Table 1 lists the output fields for the show ldp overview command. Output fields are listed in the approximate order in which they appear.

Table 1: show ldp overview Output Fields

Field Name

Field description

Level of Output

Instance

LDP routing instance.

All Levels

Router ID

Router ID of the routing device.

All Levels

Message ID

Unique identifier of message.

All Levels

Configuration sequence

Value of configuration sequence.

All Levels

Deaggregate

Status of control forwarding equivalence class (FEC) deaggregation on the router. By default it is disabled on the router.

All Levels

Explicit null

Advertise label 0 to the egress routing device of an LSP. Explicit null: enabled or disabled.

Note:

If you do not include the explicit-null statement in the configuration, label 3 (implicit null) is advertised.

All Levels

IPv6 tunneling

Internet Protocol version 6 tunneling: enabled or disabled.

All Levels

Strict targeted hellos

Prevent LDP sessions from being established with remote neighbors that have not been specifically configured. Strict targeted hellos: enabled or disabled.

Note:

LDP peers will not respond to targeted hellos coming from a source that is not one of the configured remote neighbors.

All Levels

Loopback if added

Loopback interface is added: yes or no.

All Levels

Route preference

Default preference value (also known as an administrative distance) assigned to each route that the routing table receives. LDP preference is: 9

All Levels

Unicast transit LSP chaining

Unicast transit LSP chaining: enabled or disabled.

All Levels

P2MP transit LSP chaining

P2MP transit LSP chaining: enabled or disabled.

All Levels

Transit LSP statistics based on route statistics

Transit LSP statistics based on route statistics: enabled or disabled.

All Levels

Longest match

Longest match for label mapping: enabled or disabled.

All Levels

Capabilities enabled

Enabled capabilities: none

All Levels

Timers

  • Keepalive interval: Keepalive interval value.

  • Keepalive timeout: Time interval for which the neighbor LDP node waits before determining session failure.

  • Link hello interval: Specify how often the router sends Link Management Protocol (LMP) hello packets.

  • Link hello hold time: Time interval for which an LDP node waits for a hello message before declaring a neighbor is down.

  • Targeted hello interval: Specify how often LDP sends targeted hello messages.

  • Targeted hello hold time: Time interval for which a sending LSR maintains a record of targeted hello messages from the receiving LSR without receipt of another targeted hello message from that LSR.

  • Label withdraw delay: Time interval for withdrawing labels to reduce router workload during IGP convergence.

All Levels

Graceful restart

Graceful restart attributes.

  • Restart– Graceful restart capability: enabled or disabled.

  • Helper– Standard graceful restart helper capability: enabled or disabled.

  • Restart in process– Graceful restart in process.

  • Reconnect time– Period of time that a restarting LSR (label switched router) designates to LDP neighbors to wait until the former reestablishes the session after restarting.

  • Max neighbor reconnect time– Maximum reconnect time.

  • Recovery time– Period of time that an LSR preserves its state across the restart.

  • Max neighbor recovery time– Maximum recovery time designated to LDP neighbors by a restarting LSR.

All Levels

Traffic Engineering

  • Bgp igp– BGP and IGP destinations: enabled or disabled. When enabled, IGPs use MPLS paths for forwarding traffic.

  • Both ribs– BGP and IGP destinations with routes in both RIBs: enabled or disabled.

  • Mpls forwarding– MPLS routes used for forwarding: enabled or disabled.

All Levels

IGP

  • Tracking igp metric–Cause the IGP route metric to be used for the LDP routes instead of the default LDP route metric (the default LDP route metric is 1).

  • Sync session up delay– Time interval to synchronize LDP session.

All Levels

Session protection

  • Session protection– Remote neighbor added to LDP configuration which enables protection for all sessions in the corresponding LDP instance: enabled or disabled.

  • Session protection timeout– Period of time until which the remote neighbor is connected to LSR in the absence of link neighbors.

All Levels

Interface addresses advertising

Advertises interface address.

All Levels

Label allocation

Label accounting information.

  • Current number of LDP labels allocated—Number of labels currently in use.

  • Total number of LDP labels allocated—Cumulative number of labels being allocated.

  • Total number of LDP labels freed—Cumulative number of labels being freed.

  • Total number of LDP label allocation failures—Cumulative number of failures for allocating a label.

  • Current number of labels allocated by all protocols—Number of labels currently being used by routing protocols.

All Levels

Sample Output

show ldp overview

Release Information

Command introduced in Junos OS Release 11.2.