Technical Documentation

show (ospf |ospf3) backup spf

Syntax

Release Information

Command introduced in JUNOS Release 10.0.

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 | topology-name): (Optional) Display information about the default topology or a specifc topology.

Required Privilege Level

view

List of Sample Output

show ospf backup spf
show ospf backup spf detail
show ospf3 backup spf

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
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

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
  ...

show ospf backup spf detail

user@host> show ospf backup spf detail

Topology default results:

Area 0.0.0.0 results:

11.14.10.2
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: ae0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.52
  Self to Destination Metric: 1
  Parent Node: 11.14.10.2
  Primary next-hop: ae0.0 via 11.14.10.2
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.242
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: as0.0
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.243
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: so-6/0/0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

12.15.0.1
  Self to Destination Metric: 2
  Parent Node: 10.255.71.243
  Primary next-hop: so-6/0/0.0
  Backup next-hop: ae0.0 via 11.14.10.2
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 17, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

10.255.71.238
  Self to Destination Metric: 2
  Parent Node: 10.255.71.243
  Primary next-hop: so-6/0/0.0
  Backup next-hop: as0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

10.255.71.239
  Self to Destination Metric: 2
  Parent Node: 12.15.0.1
  Primary next-hop: so-6/0/0.0
  Backup next-hop: ae0.0 via 11.14.10.2
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

14.15.0.2
  Self to Destination Metric: 3
  Parent Node: 10.255.71.239
  Primary next-hop: so-6/0/0.0          
  Backup next-hop: ae0.0 via 11.14.10.2
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 17, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

show ospf3 backup spf

user@host> show ospf3 backup spf

Area 0.0.0.0 results:

10.255.71.52;0.0.0.5
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: ae0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.52
  Self to Destination Metric: 1
  Parent Node: 10.255.71.52;0.0.0.5
  Primary next-hop: ae0.0 via fe80::290:69ff:fe0f:67f0
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.242
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: as0.0
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.243
  Self to Destination Metric: 1
  Parent Node: 10.255.70.103
  Primary next-hop: so-6/0/0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 0, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not eligible, Reason: Path loops

10.255.71.243;0.0.0.2
  Self to Destination Metric: 2
  Parent Node: 10.255.71.243
  Primary next-hop: so-6/0/0.0
  Backup next-hop: ae0.0 via fe80::290:69ff:fe0f:67f0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 17, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

10.255.71.238
  Self to Destination Metric: 2
  Parent Node: 10.255.71.243
  Primary next-hop: so-6/0/0.0
  Backup next-hop: as0.0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

10.255.71.239
  Self to Destination Metric: 2
  Parent Node: 10.255.71.243;0.0.0.2
  Primary next-hop: so-6/0/0.0
  Backup next-hop: ae0.0 via fe80::290:69ff:fe0f:67f0
  Backup Neighbor: 10.255.71.243
    Neighbor to Destination Metric: 1, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 16, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered

10.255.71.239;0.0.0.4
  Self to Destination Metric: 3
  Parent Node: 10.255.71.239
  Primary next-hop: so-6/0/0.0
  Backup next-hop: ae0.0 via fe80::290:69ff:fe0f:67f0
  Backup Neighbor: 10.255.71.243        
    Neighbor to Destination Metric: 2, Neighbor to Self Metric: 1
    Self to Neighbor Metric: 1
    Not eligible, Reason: Primary next-hop link fate sharing
  Backup Neighbor: 10.255.71.52
    Neighbor to Destination Metric: 15, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Eligible, Reason: Contributes backup next-hop
  Backup Neighbor: 10.255.71.242
    Neighbor to Destination Metric: 17, Neighbor to Self Metric: 15
    Self to Neighbor Metric: 1
    Not evaluated, Reason: Interface is already covered