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show (ospf | ospf3) neighbor

date_range 19-Nov-23

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Syntax

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show (ospf | ospf3) neighbor 
<brief | detail | extensive> 
<area area-id>
<instance (all |  instance-name)>
<interface interface-name>
<logical-system (all | logical-system-name)>
<neighbor>
<realm (ipv4-multicast | ipv4-unicast | ipv6-multicast)>

Syntax (EX Series Switches and QFX Series)

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show (ospf | ospf3) neighbor 
<brief | detail | extensive> 
<area area-id>
<instance (all |  instance-name)>
<interface interface-name>
<neighbor>

Description

Display information about OSPF neighbors.

CPU utilization might increase while the device learns its OSPF neighbors. We recommend that you use the show (ospf | ospf3) neighbor command after the device learns and establishes OSPF neighbor adjacencies. Depending on the size of your network, this might take several minutes. If you receive a “timeout communicating with routing daemon” error when using the show (ospf | ospf3) neighbor command, wait several minutes before attempting to use the command again. This is not a critical system error, but you might experience a delay in using the CLI.

Options

none	Display standard information about all OSPF neighbors for all routing instances.
brief \| detail \| extensive	(Optional) Display the specified level of output.
area `area-id`	(Optional) Display information about the OSPF neighbors for the specified area.
instance (all \| `instance-name`)	(Optional) Display all OSPF interfaces for all routing instances or under the named routing instance.
interface `interface-name`	(Optional) Display information about OSPF neighbors for the specified logical interface.
logical-system (all \| `logical-system-name`)	(Optional) Perform this operation on all logical systems or on a particular logical system.
`neighbor`	(Optional) Display information about the specified OSPF neighbor.
realm (ipv4-multicast \| ipv4-unicast \| ipv6-multicast)	(OSPFv3 only) (Optional) Display information about the OSPF neighbors for the specified OSPFv3 realm, or address family. Use the `realm` option to specify an address family for OSPFv3 other than IPv6 unicast, which is the default.

Required Privilege Level

view

Output Fields

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

Table 1: show (ospf | ospf3) neighbor Output Fields
Field Name	Field Description	Level of Output
Address	Address of the neighbor.	All levels
Interface	Interface through which the neighbor is reachable.	All levels
State	State of the neighbor: Attempt—Valid only for neighbors attached to nonbroadcast networks. It indicates that no recent information has been received from the neighbor, but that a more concerted effort must be made to contact the neighbor. Down—Initial state of a neighbor conversation. It indicates that no recent information has been received from the neighbor. Hello packets might continue to be sent to neighbors in the Down state, although at a reduced frequency. Exchange—Routing device is describing its entire link-state database by sending database description packets to the neighbor. Each packet has a sequence number and is explicitly acknowledged. ExStart—First step in creating an adjacency between the two neighboring routing devices. The goal of this step is to determine which routing device is the primary, and to determine the initial sequence number. Full—Neighboring routing devices are fully adjacent. These adjacencies appear in router link and network link advertisements. Init—A hello packet has recently been sent by the neighbor. However, bidirectional communication has not yet been established with the neighbor. This state may occur, for example, because the routing device itself did not appear in the neighbor's hello packet. Loading—Link-state request packets are sent to the neighbor to acquire more recent advertisements that have been discovered (but not yet received) in the Exchange state. 2Way—Communication between the two routing devices is bidirectional. This state has been ensured by the operation of the Hello Protocol. This is the most advanced state short of beginning adjacency establishment. The (backup) designated router is selected from the set of neighbors in state 2Way or greater.	All levels
ID	Router ID of the neighbor.	All levels
Pri	Priority of the neighbor to become the designated router.	All levels
Dead	Number of seconds until the neighbor becomes unreachable.	All levels
Link state acknowledgment list	Number of link-state acknowledgments received.	`extensive`
Link state retransmission list	Total number of link-state advertisements retransmitted. For extensive output only, the following information is also displayed: Type—Type of link advertisement: ASBR, Sum, Extern, Network, NSSA, OpaqArea, Router, or Summary. LSA ID—LSA identifier included in the advertisement. An asterisk preceding the identifier marks database entries that originated from the local routing device. Adv rtr—Address of the routing device that sent the advertisement. Seq—Link sequence number of the advertisement.	`detail extensive`
Neighbor-address	(OSPFv3 only) If the neighbor uses virtual links, the Neighbor-address is the site-local, local, or global address. If the neighbor uses a physical interface, the Neighbor-address is an IPv6 link-local address.	`detail extensive`
area	Area that the neighbor is in.	`detail` `extensive`
OSPF3-Intf-Index	(OSPFv3 only) Displays the OSPFv3 interface index.	`detail` `extensive`
opt	Option bits received in the hello packets from the neighbor.	`detail` `extensive`
DR or DR-ID	Address of the designated router.	`detail` `extensive`
BDR or BDR-ID	Address of the backup designated router.	`detail` `extensive`
Up	Length of time since the neighbor came up.	`detail` `extensive`
adjacent	Length of time since the adjacency with the neighbor was established.	`detail` `extensive`
SPRING Adjacency Labels	Segment routing in networking adjacency labels. Note: Displayed only when segment routing is enabled	`detail` `extensive`
Label	Segment routing label.	`detail` `extensive`
Flags	Segment routing flags. Flags VL indicate value and local.	`detail` `extensive`

show ospf neighbor brief

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user@host> show ospf neighbor brief    
  Address         Intf               State      ID              Pri  Dead
168.254.225  fxp3.0              2Way      10.250.240.32    128   36
168.254.230  fxp3.0              Full      10.250.240.8     128   38
168.254.229  fxp3.0              Full      10.250.240.35    128   33
1.1.129       fxp2.0              Full      10.250.240.12    128   37
1.1.131       fxp2.0              Full      10.250.240.11    128   38
1.2.1         fxp1.0              Full      10.250.240.9     128   32
1.2.81        fxp0.0              Full      10.250.240.10    128   33

show ospf neighbor detail

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user@host> show ospf neighbor detail    
Address          Interface              State     ID               Pri  Dead
10.0.6.60        lt-1/2/0.12            Full      1.1.1.60         128    38
  Area 0.0.0.0, opt 0x52, DR 0.0.0.0, BDR 0.0.0.0
  Up 23:53:47, adjacent 23:53:34
  SPRING Adjacency Labels:

    Label       Flags

    299968      VL      

10.0.10.70       lt-1/2/0.14            Full      1.1.1.70         128    37
  Area 0.0.0.0, opt 0x52, DR 0.0.0.0, BDR 0.0.0.0
  Up 23:53:47, adjacent 23:53:47
  SPRING Adjacency Labels:

     Label       Flags

     299952      VL      

show ospf neighbor extensive

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user@host> show ospf neighbor extensive    
  Address         Interface             State      ID              Pri  Dead
10.5.1.2         ge-1/2/0.1             Full      10.5.1.2         128   33  
  area 0.0.0.1, opt 0x42, DR 10.5.1.2, BDR 10.5.1.1
  Up 06:09:42, adjacent 05:17:50
    Link state retransmission list:

      Type      LSA ID           Adv rtr          Seq

     Summary  10.8.56.0        172.25.27.82     0x8000004d

     Router   10.5.1.94        10.5.1.94        0x8000005c

     Network  10.5.24.2        10.5.1.94        0x80000036

     Summary  10.8.57.0        172.25.27.82     0x80000024

     Extern   1.10.90.0        10.8.1.2         0x80000041

     Extern   1.4.109.0        10.6.1.2         0x80000041

     Router   10.5.1.190       10.5.1.190       0x8000005f

     Network  10.5.48.2        10.5.1.190       0x8000003d

     Summary  10.8.58.0        172.25.27.82     0x8000004d

     Extern   1.10.91.0        10.8.1.2         0x80000041

     Extern   1.4.110.0        10.6.1.2         0x80000041

     Router   10.5.1.18        10.5.1.18        0x8000005f

     Network  10.5.5.2         10.5.1.18        0x80000033

     Summary  10.8.59.0        172.25.27.82     0x8000003a

     Summary  10.8.62.0        172.25.27.82     0x80000025

10.5.10.2        ge-1/2/0.10            ExStart   10.5.1.38        128   38  
  area 0.0.0.1, opt 0x42, DR 10.5.10.2, BDR 10.5.10.1
  Up 06:09:42
    master, seq 0xac1530f8, rexmit DBD in 2 sec
    rexmit LSREQ in 0 sec
10.5.11.2        ge-1/2/0.11            Full      10.5.1.42        128   33  
  area 0.0.0.1, opt 0x42, DR 10.5.11.2, BDR 10.5.11.1
  Up 06:09:42, adjacent 05:27:00
    Link state retransmission list:

      Type      LSA ID           Adv rtr          Seq

     Summary  10.8.58.0        172.25.27.82     0x8000004d

     Extern   1.10.91.0        10.8.1.2         0x80000041

     Extern   1.1.247.0        10.5.1.2         0x8000003f

     Extern   1.4.110.0        10.6.1.2         0x80000041

     Router   10.5.1.18        10.5.1.18        0x8000005f

     Network  10.5.5.2         10.5.1.18        0x80000033

     Summary  10.8.59.0        172.25.27.82     0x8000003a

Release Information

Command introduced before Junos OS Release 7.4.

instance all option introduced in Junos OS Release 9.1.

instance all option introduced in Junos OS Release 9.1 for EX Series switches.

area, interface, and realm options introduced in Junos OS Release 9.2.

area and interface options introduced in Junos OS Release 9.2 for EX Series switches.

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Junos CLI Reference

ON THIS PAGE

show (ospf | ospf3) neighbor

Syntax

Syntax (EX Series Switches and QFX Series)

Description

Options

Required Privilege Level

Output Fields

Sample Output

show ospf neighbor brief

show ospf neighbor detail

show ospf neighbor extensive

Release Information

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Junos CLI Reference

ON THIS PAGE

show (ospf | ospf3) neighbor

Syntax

Syntax (EX Series Switches and QFX Series)

Description

Options

Required Privilege Level

Output Fields

Sample Output

show ospf neighbor brief

show ospf neighbor detail

show ospf neighbor extensive

Release Information

Related Documentation

Stay in touch