display ospf vlink

Function

The display ospf vlink command displays OSPF virtual links.

Format

display ospf [ process-id ] vlink

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 4294967295.

Parameter

Description

Value

process-id

Specifies the ID of an OSPF process.

The value is an integer ranging from 1 to 4294967295.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
ospf	read

Usage Guidelines

Usage Scenario

After OSPF areas are defined, OSPF route updates between non-backbone areas are transmitted through a backbone area. Therefore, OSPF requires that all non-backbone areas maintain the connectivity with the backbone area and the backbone areas in different OSPF areas maintain the connectivity with each other. In real world situations, this requirement may not be met because of some restrictions. To resolve this problem, you can configure OSPF virtual links.

The display ospf vlink command displays OSPF virtual link information, which can help you troubleshoot OSPF virtual link faults.

Example

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

# Display OSPF virtual links.

<HUAWEI> display ospf vlink
OSPF Process 1 with Router ID 1.1.1.1
                  Virtual Links
 Virtual-link Neighbor-id  -> 2.2.2.2, Neighbor-State: Full
 Interface: 10.1.1.1 (GigabitEthernet0/1/0)
 Cost: 1  State: P-2-P  Type: Virtual
 Transit Area: 0.0.0.1
 Timers: Hello 10 , Dead 40 , Retransmit 5 , Transmit Delay 1
 GR State: Normal

**Table 1** Description of the **display ospf vlink** command output
Item	Description
Virtual-link Neighbor-id	ID of the neighboring router that is connected through the virtual link.
Transit Area	Transit area ID if the current interface is a virtual link.
GR State	GR status: Normal: indicates that no GR is performed. Doing GR: indicates that the Router is performing GR. Complete GR: indicates that the Router finishes GR. Helper: indicates that the Router is Helper when the neighbor is performing GR.
Neighbor-State	Neighbor status, such as Down, Init, 2-Way, ExStart, Exchange, Loading, and Full.
Interface	Information about interfaces in the area, that is, IP address and name of the primary interface.
Cost	Cost.
State	Interface status.
Type	Interface type.
Timers	Interval for sending Hello messages, Dead time, polling interval (NBMA), retransmission interval, and transmission delay on the interface.