peer bfd(BGP multi-instance VPN instance view)

Function

The peer bfd command sets BFD detection parameters for a peer.

The undo peer bfd command restores default BFD detection parameter values.

By default, the interval at which BFD packets are sent is 10 milliseconds, the interval at which BFD packets are received is 10 milliseconds, the local detection time multiplier is 3.

Format

peer peerIpv4Addr bfd { min-tx-interval min-tx-value | min-rx-interval min-rx-value | detect-multiplier multiplier } ^*

undo peer peerIpv4Addr bfd { min-tx-interval | min-rx-interval | detect-multiplier } ^*

Parameters

Parameter	Description	Value
peerIpv4Addr	Specifies the IPv4 address of a peer.	It is in dotted decimal notation.
min-tx-interval min-tx-value	Specifies the interval at which BFD packets are sent.	The value is an integer ranging from 3 to 1000, in milliseconds. The default value is 1000.
min-rx-interval min-rx-value	Specifies the interval at which BFD packets are received.	The value is an integer ranging from 3 to 1000, in milliseconds. The default value is 1000.
detect-multiplier multiplier	Specifies the local detection time multiplier.	The value is an integer ranging from 3 to 50. The default value is 3.

Views

BGP multi-instance VPN instance view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

BFD provides millisecond-level fault detection. It helps BGP to detect faults in neighboring devices or links more quickly, and instructs BGP to recalculate routes for correct packet forwarding. The peer bfd command can be used to set the values of BFD session parameters on a specified interface.

The BFD configuration of a peer takes precedence over that of the peer group to which the peer belongs. If BFD is not configured on a peer and the peer group to which the peer belongs is enabled with BFD, the peer will inherit the BFD configurations of the peer group.

Example

# Configure BFD and set detection parameters on the peer.

<HUAWEI> system-view
[~HUAWEI] ip vpn-instance vpna
[*HUAWEI-vpn-instance-vpna] ipv4-family
[*HUAWEI-vpn-instance-vpn1-af-ipv4] route-distinguisher 100:1
[*HUAWEI-vpn-instance-vpna-af-ipv4] quit
[*HUAWEI-vpn-instance-vpna] quit
[*HUAWEI] bgp 100 instance a
[*HUAWEI-bgp-instance-a] vpn-instance vpna
[*HUAWEI-bgp-instance-a-instance-vpna] peer 10.1.1.1 as-number 100
[*HUAWEI-bgp-instance-a-instance-vpna] peer 10.1.1.1 bfd min-tx-interval 100 min-rx-interval 100 detect-multiplier 5