show isis backup spf results

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

Related Topics

List of Sample Output

Output Fields

Table 73 lists the output fields for the show isis backup spf results command. Output fields are listed in the approximate order in which they appear.

Sample Output

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.

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

Syntax