display ospf topology verbose

Function

The display ospf topology verbose command displays the SPF tree information depending on process and area for OSPFv2.

Format

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

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.

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.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
ospf	read

Usage Guidelines

Usage Scenario

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

Prerequisites

To view information about the topology based on which OSPF routes are calculated, including the time when route calculation is performed, 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 verbose

          OSPF Process 1 with Router ID 1.1.1.1
Bits :
B - ABR    E - ASBR    V - VIRTUAL    NT - NSSA translator

Shortest Path Tree for Area: 0.0.0.0

Node: Router    1.1.1.1    Cost: 0 Cost(tunnel): 0
    BitFlags : B
    Segment Routing Info:
      Algorithm: SPF
      SRGB: [160000 - 170000]
    Neighbors: 1 (Children:(1) Parents:(0))
    Neighbor List:
        router  6.6.6.6, Child, cost: 100

**Table 1** Description of the **display ospf topology verbose** command output
Item	Description
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.
Shortest Path Tree for Area	Display detailed information about the topology based on which OSPF routes are calculated in a specified area.
BitFlags	Device type.
Segment Routing Info	SR routing information.
Neighbor List	Neighbor router ID list.
cost	Cost.
Algorithm	Algorithm.
SRGB	SRGB range.
Neighbors	Number of neighbors.
Node	Node Type.