Technical Documentation

show isis overview

Syntax

show isis overview <instance instance-name><logical-system (all | logical-system-name)>

Syntax (EX Series Switch)

show isis overview <instance instance-name>

Release Information

Command introduced in JUNOS Release 8.5.

Command introduced in JUNOS Release 9.0 for EX Series switches.

Description

Display Intermediate System-to Intermediate System (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

instance

The IS-IS routing intance.

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.

Attached bit evaluation

Attached bit capability: enabled or disabled.

SPF delay

Delay before performing consecutive Shortest Path First calculations.

SPF holddown

Delay before performing additional Shortest Path First (SPF) calculations after the maximum number of consecutive SPF calculations is reached.

SPF rapid runs

Maximum number of Shortest Path First 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.

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: enalbed 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.

CLNS is enabled

OSI CLNP Protocol capability is enabled. (J Series routers only)

Internal route preference

Preference value of internal routes.

External route preference

Preference value of external routes.

Wide area metrics are enabled

Wide area metrics capability is enabled.

Narrow metrics is enabled

Narrow metrics capability is enabled.

Sample Output

show isis overview

user@host> show isis overview

Sample Output

Instance: master
  Router ID: 192.168.1.220
  Adjacency holddown: enabled
  Maximum Areas: 3
  LSP life time: 65535
  Attached bit evaluation: enabled
  SPF delay: 200 msec, SPF holddown: 5000 msec, SPF rapid runs: 3
  Overload bit at startup is set
    Overload high metrics: disabled
    Overload timeout: 300 sec, expires in 295 seconds
  IPv4 is enabled, IPv6 is enabled
  Traffic engineering: enabled
  Restart: Enabled
    Restart duration: 210 sec
    Helper mode: Enabled
  Level 1
    Internal route preference: 15
    External route preference: 160
    Wide metrics are enabled, Narrow metrics are enabled
  Level 2
    Internal route preference: 18
    External route preference: 165
    Wide metrics are enabled

Published: 2010-01-13