Technical Documentation

show isis backup spf results

Syntax

show isis backup spf results<instance instance-name><level (1 | 2)><logical-system (all | logical-system-name)><no-coverage><topology (ipv4-unicast | ipv6-multicast | ipv6-unicast | unicast)>

Syntax (EX Series Switch)

show isis backup spf results<instance instance-name><level (1 | 2)><no-coverage><topology (ipv4-unicast | unicast)>

Release Information

Command introduced in Junos OS Release 9.5.

Command introduced in Junos OS Release 9.5 for EX Series switches.

Description

Display information about IS-IS shortest-path-first (SPF) calculations for backup paths.

Options

none

Display information about IS-IS shortest-path-first (SPF) calculations for all backup paths for all destination nodes.

instance instance-name

(Optional) Display SPF calculations for backup paths for the specified routing instance.

level (1 | 2)

(Optional) Display SPF calculations for the backup paths for the specified IS-IS level.

logical-system logical-system-name

(Optional) Display SPF calculations for the backup paths for all logical systems or on a particular logical system.

no-coverage

(Optional) Display SPF calculations only for destinations that do not have backup coverage.

topology (ipv4-multicast | ipv6-multicast | ipv6-unicast | unicast)

(Optional) Display SPF calculations for backup paths for the specified topology only.

Required Privilege Level

view

Related Topics

List of Sample Output

show isis backup spf results

Output Fields

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

Table 1: show isis backup spf results Output Fields

Field Name

Field Description

node-name

Name of the destination node.

Address

Address of the destination node.

Primary next-hop

Interface and name of the node of the primary next hop to reach the destination.

Root

Name of the next-hop neighbor.

Metric

Metric to the node.

Eligible

Indicates that the next-hop neighbor has been designated as a backup path to the destination node.

Backup next-hop

Name of the interface of the backup next hop.

SNPA

Subnetwork point of attachment (MAC address of the next hop).

LSP

Name of the MPLS LSP designated as a backup path.

Not eligible

Indicates that the next-hop neighbor cannot function as a backup path to the destination.

Reason

Describes why the next-hop neighbor is designated as Not eligible as a backup path.

Sample Output

show isis backup spf results

user@host> show isis backup spf results
IS-IS level 1 SPF results:
  0 nodes

 IS-IS level 2 SPF results:
kobuk.00, Address 0x8d85600
  Primary next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
  Primary next-hop: so-0/1/2.0, crater
  Primary next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
  Primary next-hop: so-0/1/2.0, crater
    Root: crater, Metric: 10
      Not eligible, Reason: Primary next-hop multipath 
    Root: camaro, Metric: 10
      Not eligible, Reason: Primary next-hop multipath 
    Root: olympic, Metric: 25
      Not eligible, Reason: Primary next-hop multipath 
glacier.00, Address 0x8d85200
  Primary next-hop: so-0/1/2.0, crater
  Primary next-hop: so-0/1/2.0, crater
    Root: crater, Metric: 10
      Not eligible, Reason: Primary next-hop link fate sharing 
    Root: olympic, Metric: 15
      Eligible, Backup next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
      Eligible, Backup next-hop: so-1/0/2.0, olympic
      Eligible, Backup next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
      Eligible, Backup next-hop: so-1/0/2.0, olympic
    Root: camaro, Metric: 20
      Eligible, Backup next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
      Eligible, Backup next-hop: so-1/0/2.0, olympic
      Eligible, Backup next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
      Eligible, Backup next-hop: so-1/0/2.0, olympic
olympic.00, Address 0x8d00c00
  Primary next-hop: so-1/0/2.0, olympic
  Primary next-hop: so-1/0/2.0, olympic
    Root: olympic, Metric: 0
      Not eligible, Reason: Primary next-hop link fate sharing 
    Root: crater, Metric: 20
      track-item: olympic.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
    Root: camaro, Metric: 20
      track-item: olympic.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
camaro.00, Address 0x8d85a00
  Primary next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
  Primary next-hop: ge-0/2/0.0, camaro, SNPA:  0:90:69:f:62:fa
    Root: camaro, Metric: 0
      Not eligible, Reason: Primary next-hop link fate sharing 
    Root: crater, Metric: 20
      track-item: camaro.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
    Root: olympic, Metric: 20
      track-item: camaro.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
crater.00, Address 0x8d85000
  Primary next-hop: so-0/1/2.0, crater
  Primary next-hop: so-0/1/2.0, crater
    Root: crater, Metric: 0
      Not eligible, Reason: Primary next-hop link fate sharing 
    Root: camaro, Metric: 20
      track-item: crater.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
    Root: olympic, Metric: 20
      track-item: crater.00-00
      track-item: banff.00-00
      Not eligible, Reason: Path loops 
  5 nodes

Published: 2010-07-13

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