Technical Documentation

show isis interface

Syntax

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

Syntax (EX Series Switch)

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.

Description

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

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 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 not 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 number of seconds remaining.	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)