display ospf bfd session

Function

The display ospf bfd session command displays information about the Bidirectional Forwarding Detection (BFD) enabled neighbor.

Format

display ospf [ process-id ] bfd session interface-type interface-number [ router-id ]

display ospf [ process-id ] bfd session { router-id | all }

Parameters

Parameter	Description	Value
process-id	Specifies the ID of an OSPF process.	The value is an integer ranging from 1 to 65535.
interface-type interface-number	Specifies the type and number of the interface.	-
router-id	Specifies the router ID of the neighbor.	In dotted decimal notation.
all	Indicates all the OSPF-enabled interfaces in the OSPF process.	-

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

In BFD for OSPF, a BFD session is associated with OSPF. The BFD session fast detects a link fault and then notifies OSPF of the fault. This speeds up OSPF's response to the change of the network topology.

The display ospf bfd session command displays information about the BFD-enabled neighbor.

Example

# Display information about the BFD-enabled neighbor.

<sysname> display ospf bfd session all

          OSPF Process 1 with Router ID 1.1.1.1

 NeighborId:2.2.2.2          AreaId:0.0.0.0          Interface:GigabitEthernet 0/0/1

 BFDState:up                 rx    :1000             tx       :1000

 Multiplier:3                BFD Local Dis:8198      LocalIpAdd:10.1.1.1

 RemoteIpAdd:10.1.1.2        Diagnostic Info:No diagnostic information

**Table 1** Description of the **display ospf** **bfd** **session** **all** command output
Item	Description
NeighborId	Router ID of the neighbor
AreaId	Area ID
Interface	Interface through which the local router establishes a BFD session with the neighbor
BFDState	BFD status: up down unknown
rx	Negotiated minimum interval for receiving BFD packets
tx	Negotiated minimum interval for sending BFD packets
Multiplier	Remote detection multiplier
BFD Local Dis	Local discriminator dynamically assigned by BFD
LocalIpAdd	Local IP address
RemoteIpAdd	Remote IP address
Diagnostic Info	Diagnostic information: Init: indicates that the BFD session is in the Initiate state. Admin down: indicates that the shutdown command is run on the local BFD session. BFD global disable: indicates that BFD is not enabled globally. BFD session number exceed: indicates that the number of BFD sessions exceeds the limit. Detect down: indicates that the local link becomes Down. Receive admin down: indicates that the remote link becomes Down. BFD is in rearranging: indicates that the board of the BFD session changes, and the data of the BFD session is transferred to another board. No diagnostic information.