display ospf topology

Function

The display ospf topology command displays information about the topology based on which OSPF routes are calculated.

Format

display ospf [ process-id ] topology [ area { area-id | area-ipv4 } ] [ statistics ]

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 4294967295.
area area-id	Specifies the ID of an OSPF area.	The value is an integer ranging from 0 to 4294967295.
area-ipv4	Specifies the ID of an OSPF area in IP address format.	The value is in the format of an IPv4 address.
statistics	Displays statistics about the topology based on which OSPF routes are calculated.	-

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
ospf	read

Usage Guidelines

Usage Scenario

To view information about the topology based on which OSPF routes are calculated, including the cause of route calculation, and the number of changed routes, run the display ospf topology command. The command output helps you diagnose OSPF route flapping.

If segment routing is configured and a segment routing next hop exists, the display ospf topology verbose command displays the segment routing next hop. If segment routing anti-micro loop is configured and the device is in the anti-micro loop state, the display ospf topology verbose command displays the label stack of segment routing anti-micro loop.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display detailed information about the topology based on which OSPF routes are calculated.

<HUAWEI> display ospf topology
OSPF Process 1 with Router ID 10.9.9.9
 Bits :
 B - ABR    E - ASBR    V - VIRTUAL    NT - NSSA translator

 OSPF Area 0.0.0.0 topology
 Type  ID            Bits    Metric    Next-Hop        Interface
 Rtr   10.8.8.8      B       1         10.11.11.1      GE0/1/16.1
 Rtr   10.9.9.9      E       1         -               -
 Net   10.11.11.1    B       1         10.11.11.2      GE0/1/16.1

**Table 1** Description of the **display ospf topology** command output
Item	Description
ID	Route advertiser.
Bits	Device type.
B - ABR	Area border router.
E - ASBR	Autonomous system boundary router.
V - VIRTUAL	Virtual link device.
NT - NSSA translator	ABR in an NSSA that translates LSAs.
Type	LSA type.
Metric	Cost.
Next-Hop	Router ID of the next hop.
Interface	Interface of the next hop.