show isis overview

Syntax

Syntax (EX Series Switches and QFX Series)

Release Information

Command introduced in Junos OS Release 8.5.

Description

Display IS-IS overview information.

Options

none—Display standard overview information about IS-IS for all routing instances.

instance instance-name—(Optional) Display overview information for the specified routing instance.

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 overview

Output Fields

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

Table 1: show isis overview Output Fields

Field Name	Field Description
Hostname	Name of the router.
Sysid	Part of the ISO address of the routing device.
Areaid	The area number of the routing device.
Instance	IS-IS routing instance.
Router ID	Router ID of the routing device.
Adjacency holddown	Adjacency holddown capability: enabled or disabled.
Maximum Areas	Maximum number of IS-IS areas advertised by the routing device.
LSP life time	Lifetime of the link-state PDU, in seconds.
Filter low life time LSPs up to	LSPs with a lifetime lower than this value are filtered out.
Attached bit evaluation	Attached bit capability: enabled or disabled.
SPF delay	Delay before performing consecutive shortest-path-first (SPF) calculations.
SPF holddown	Delay before performing additional SPF calculations after the maximum number of consecutive SPF calculations is reached.
SPF rapid runs	Maximum number of SPF calculations that can be performed in succession before the holddown timer begins.
Overload bit at startup is set	Overload bit capability is enabled.
Overload high metrics	Overload high metrics capability: enabled or disabled.
Allow internal prefix overloading	Allow internal prefixes to be advertised with high metric: enabled or disabled
Allow external prefix overloading	Allow external prefixes to be advertised with high metric: enabled or disabled
Overload timeout	Time period after which overload is reset and the time that remains before the timer is set to expire.
Traffic engineering	Traffic engineering capability: enabled or disabled.
Restart	Graceful restart capability: enabled or disabled.
Restart duration	Time period for complete reacquisition of IS-IS neighbors.
Helper mode	Graceful restart helper capability: enabled or disabled.
Level	IS-IS level: 1—Level 1 information 2—Level 2 information
IPv4 is enabled	IP Protocol version 4 capability is enabled.
IPv6 is enabled	IP Protocol version 6 capability is enabled.
Micro-loop avoidance	Micro-loop avoidance is enabled. Generally adjacent nodes converge faster than neighboring nodes causing traffic to loop. A route convergence delay is configured to avoid such micro loops.
Internal route preference	Preference value of internal routes.
External route preference	Preference value of external routes.
Prefix export limit	Number of prefixes allowed to be exported, as configured by the prefix-export-limit statement.
Prefix export count	Number of prefixes exported.
Wide area metrics are enabled	Wide area metrics capability is enabled.
Narrow metrics are enabled	Narrow metrics capability is enabled.
Adjacency holddown is active	IS-IS adjacencies come up one after another when adjacency holddown is enabled.
SRv6	Indicates the SRv6 capability of the device.
Locator	END-SID is attached to this locator address.
END-SID	Function for the prefix segments.
Flavor	Behavior of the END-SID function. This field can have the following values: PSP—Penultimate segment pop of the segment routing header (SRH). USP—Ultimate segment pop of the SRH. USD—Ultimate segment decapsulation of the SRH.

Sample Output

show isis overview

user@host> show isis overview

user@host> show isis overview (Segment Routing)

user@host> show isis overview logical-system
R2

user@host> show isis overview logical-system
R3