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show isis interface

date_range 19-Nov-23

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Syntax

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

Syntax (EX Series Switches and QFX Series)

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

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.

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

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. Note: Each IS-IS interface is assigned a circuit ID value to identify the interface within the linkstate database. All interfaces (loopback, broadcast, and so on) and all point-to-point links share the locally significant value of 0x01, and this value is not incremented.	`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 Note: The default IS-IS level on loopback interfaces are always same as the IS-IS level configured on other IS-IS interfaces in a router. You can also configure IS-IS level on loopback interfaces per your requirement.	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`
Flood-group Area-ID	Flood-group is configured on a specific IS-IS interface Note: Seen only when Flood-group is configured.	`detail extensive`
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`
Post convergence Protection	Post convergence protection can have the following types when enabled, `Fate Sharing` can have the following values Yes-You have configured fate-sharing protection. No-You have not configured fate-sharing protection. `node protection` can have the following values: Yes–You have configured node protection. No–You have not configured node protection. `srlg protection` can have the following values: Yes–You have configured Shared Risk Link Groutp (SRLG) protection. No–You have not configured SRLG protection. `Node cost` is the recalculated metric cost of the node.	`extensive`
Designated Router	Router responsible for sending network link-state advertisements, which describe all the routing devices 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`
IIH max size	Configured value of IS-IS hello packets	`extensive`