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show isis interface

Syntax

show isis interface<brief | detail | extensive><interface-name><logical-system (all | logical-system-name)>

Syntax (EX Series Switch and QFX Series)

show isis interface<brief | detail | extensive><interface-name>

Release Information

Command introduced before Junos OS Release 7.4.

Command introduced in Junos OS Release 9.0 for EX Series switches.

Command introduced in Junos OS Release 12.1 for the QFX Series.

Description

Display status information about Intermediate System-to-Intermediate System (IS-IS)-enabled interfaces.

Note: If the configured metric for an IS-IS level is above 63, and the wide-metrics-only statement is not configured, the show isis interface detail command and the show isis interface extensive command display 63 as the metric value for that level. Configure the wide-metrics-only statement to generate metric values greater than 63 on a per IS-IS level basis.

The show isis interface command displays the configured metric value for an IS-IS level irrespective of whether is configured or not.

For information about how to configure the wide-metrics-only statement, see the Junos OS Routing Protocols Configuration Guide PDF Document.

Options

none

Display standard information about all IS-IS-enabled interfaces.

brief | detail | extensive

(Optional) Display the specified level of output.

interface-name

(Optional) Display information about the specified interface only.

logical-system (all | logical-system-name)

(Optional) Perform this operation on all logical systems or on a particular logical system.

Required Privilege Level

view

List of Sample Output

show isis interface
show isis interface brief
show isis interface detail
show isis interface extensive
show isis interface extensive (With LDP)

Output Fields

Table 1 describes the output fields for the show isis interface command. Output fields are listed in the approximate order in which they appear.

Table 1: show isis interface Output Fields

Field Name

Field Description

Level of Output

interface-name

Name of the interface.

detail

Designated router

Routing device selected by other routers that is responsible for sending link-state advertisements that describe the network. Used only on broadcast networks.

detail

Index

Interface index assigned by the Junos OS kernel.

detail

State

Internal implementation information.

detail

Circuit id

Circuit identifier.

detail

Circuit type

Circuit type:

  • 1—Level 1 only
  • 2—Level 2 only
  • 3—Level 1 and Level 2

detail

LSP interval

Interval between link-state PDUs sent from the interface.

detail

CSNP interval

Interval between complete sequence number PDUs sent from the interface.

detail extensive

Sysid

System identifier.

detail

Interface

Interface through which the adjacency is made.

none brief

L or Level

Level:

  • 1—Level 1 only
  • 2—Level 2 only
  • 3—Level 1 and Level 2

All levels

CirID

Circuit identifier.

none brief

Level 1 DR

Level 1 designated intermediate system.

none brief

Level 2 DR

Level 2 designated intermediate system.

none brief

L1/L2 Metric

Interface's metric for Level 1 and Level 2. If there is no information, the metric is 0.

none brief

Adjacency advertisement: Advertise

This routing device has signaled to advertise this interface to its neighbors in their label-switched paths (LSPs).

detail extensive

Adjacency advertisement: Suppress

This neighbor has signaled not to advertise this interface in the routing device’s outbound LSPs.

detail extensive

Adjacencies

Number of adjacencies established on this interface.

detail

Priority

Priority value for this interface.

detail

Metric

Metric value for this interface.

detail

Hello(s) / Hello Interval

Interface's hello interval.

detail extensive

Hold(s) / Hold Time

Interface's hold time.

detail extensive

Designated Router

Router responsible for sending network link-state advertisements, which describe all the routers attached to the network.

detail

Hello padding

Type of hello padding:

  • Adaptive—On point-to-point connections, the hello packets are padded from the initial detection of a new neighbor until the neighbor verifies the adjacency as Up in the adjacency state TLV. If the neighbor does not support the adjacency state TLV, then padding continues. On LAN connections, padding starts from the initial detection of a new neighbor until there is at least one active adjacency on the interface.
  • Loose—(Default) The hello packet is padded from the initial detection of a new neighbor until the adjacency transitions to the Up state.
  • Strict—Padding is performed on all interface types and for all adjacency states, and is continuous.

extensive

LDP sync state

Current LDP synchronization state: in sync, in holddown, or not supported.

extensive

reason

Reason for being in the LDP sync state.

extensive

config holdtime

Configured value of the hold timer.

extensive

remaining

If the state is not in sync and the hold time is not infinity, then this field displays the remaining hold time in seconds.

extensive

Sample Output

show isis interface

user@host> show isis interface
IS-IS interface database:
Interface             L CirID Level 1 DR        Level 2 DR        L1/L2 Metric
at-2/3/0.0            3   0x1 Point to Point    Point to Point         10/10
lo0.0                 0   0x1 Passive           Passive                 0/0

show isis interface brief

The output for the show isis interface brief command is identical to that for the show isis interface command. For sample output, see show isis interface.

show isis interface detail

user@host> show isis interface detail
IS-IS interface database:
at-2/3/0.0
  Index: 66, State: 0x6, Circuit id: 0x1, Circuit type: 3
  LSP interval: 100 ms, CSNP interval: 5 s
  Level Adjacencies Priority Metric Hello (s) Hold (s) Designated Router
    1             1       64     10     9.000       27
    2             1       64     10     9.000       27
lo0.0
  Index: 64, State: 0x6, Circuit id: 0x1, Circuit type: 0
  LSP interval: 100 ms, CSNP interval: disabled
  Level Adjacencies Priority Metric Hello (s) Hold (s) Designated Router
    1             0       64      0 Passive
    2             0       64      0 Passive

show isis interface extensive

user@host> show isis interface extensive
IS-IS interface database:
at-2/3/0.0
  Index: 66, State: 0x6, Circuit id: 0x1, Circuit type: 3
  LSP interval: 100 ms, CSNP interval: 5 s, Loose Hello padding
  Level 1
    Adjacencies: 1, Priority: 64, Metric: 10
    Hello Interval: 9.000 s, Hold Time: 27 s
  Level 2
    Adjacencies: 1, Priority: 64, Metric: 10
    Hello Interval: 9.000 s, Hold Time: 27 s
lo0.0
  Index: 64, State: 0x6, Circuit id: 0x1, Circuit type: 0
  LSP interval: 100 ms, CSNP interval: disabled, Loose Hello padding
  Level 1
    Adjacencies: 0, Priority: 64, Metric: 0
    Passive
  Level 2
    Adjacencies: 0, Priority: 64, Metric: 0
    Passive

show isis interface extensive (With LDP)

user@host> show isis interface extensive
IS-IS interface database:
so-1/1/2.0
  Index: 114, State: 0x6, Circuit id: 0x1, Circuit type: 2
  LSP interval: 100 ms, CSNP interval: 20 s, Loose Hello padding
  Adjacency advertisement: Advertise
  LDP sync state: in sync, for: 00:01:28, reason: LDP up during config
  config holdtime: 20 seconds
  Level 2
    Adjacencies: 1, Priority: 64, Metric: 11
    Hello Interval: 9.000 s, Hold Time: 27 s
    IPV4 MulticastMetric: 10
    IPV6 UnicastMetric: 10

Published: 2012-03-19