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show (ospf | ospf3) backup spf

date_range 19-Nov-23

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Syntax

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show (ospf | ospf3) backup spf 
<brief | detail>
<area area-id>
<instance instance-name>
<logical-system (all | logical-system-name>
<no-coverage>
<node-id>
<realm (ipv4–unicast | ipv6–unicast)>
<topology (default | ipv4-multicast | topology-name)>

Syntax (QFX Series)

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show (ospf | ospf3) backup spf 
<brief | detail>
<area area-id>
<instance instance-name>
<no-coverage>
<node-id>
<topology (default | ipv4-multicast | topology-name)>

Description

Display information about OSPF shortest-path-first calculations for backup paths.

Options

none	Display information about OSPF shortest-path-first (SPF) calculations for all backup paths for all destination nodes.
brief \| detail	(Optional) Display the specified level of output.
area `area-id`	(Optional) Display the area information.
instance `instance-name`	(Optional) Display information about the routing instance.
logical-system (all \| `logical-system-name`)	(Optional) Display information about all logical systems or a specific logical system.
no-coverage	(Optional) Display information if there is no backup coverage.
`node-id`	(Optional) Display information about the node specified.
realm (ipv4–unicast \| ipv6–unicast)	(Optional) Display information about the ipv4 or ipv6 realm.
topology (default \| ipv4-multicast \| `topology-name`)	(Optional) (OSPFv2 only) Display information about the default topology, IPv4 multicast topology, or a specifc topology.

Required Privilege Level

view

Output Fields

Table 1 lists the output fields for the show (ospf |ospf3) backup spf command. Output fields are listed in the approximate order in which they appear.

Table 1: show (ospf |ospf3) backup spf Output Fields
Field Name	Field Description	Level of Output
Area `area-id` results	Area for which the results are displayed. Area 0.0.0.0 is the backbone area.	All levels
`address`	Address of the node for which the results are displayed.	All levels
Self to Destination Metric	Metric from the node to the destination.	All levels
Parent Node	Address of the parent node.	All levels
Primary next-hop	Address of the next hop.	All levels
Backup Neighbor	Address of the backup neighbor or LSP endpoint and the following information: Neighbor to Destination Metric Neighbor to Self Metric Self to Neighbor Metric Status (Eligible, Not Eligible, Not Evaluated) and the reason for the status. Note: If the backup neighbor is an LSP endpoint, it is indicated as such after the neighbor address.	All levels

Sample Output

show ospf backup spf

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user@host> show ospf backup spf
Topology default results:

Area 0.0.0.0 results:

pro16-d-lo0.xxx.yyyy.net
  Self to Destination Metric: 1
  Parent Node: pro16-b-lo0.xxx.yyyy.net
  Primary next-hop: at-1/0/1.0
  Backup Neighbor: pro16-c-lo0.xxx.yyyy.net (LSP endpoint)
    Neighbor to Destination Metric: 4, Neighbor to Self Metric: 3
    Self to Neighbor Metric: 3
    Not eligible, Reason: Path loops
  Backup Neighbor: pro16-d-lo0.xxx.yyyy.net
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  ...

Release Information

Command introduced in Junos OS Release 10.0.

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