ebgp-interface-sensitive (BGP-IPv4 unicast address family view)

Function

The ebgp-interface-sensitive command immediately resets BGP sessions between the local interface and directly connected EBGP peers if the local interface goes Down.

The undo ebgp-interface-sensitive command disables the function.

By default, this function is enabled.

Format

ebgp-interface-sensitive

undo ebgp-interface-sensitive

Parameters

None

Views

BGP-IPv4 unicast address family view, BGP-Labeled address family view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

If the ebgp-interface-sensitive command is not configured, the system does not immediately select a sub-optimal route for packet transmission if the local interface goes Down. Instead, the system waits for a period (180s by default) before checking whether another interface can be used to send packets to the same destination address. This will interrupt services for a period of time. If the ebgp-interface-sensitive command is run, BGP can fast detect an EBGP link failure and use another interface to establish a BGP peer relationship with the remote peer.

If the interface used for a BGP connection alternates between Up and Down, run the undo ebgp-interface-sensitive command to prevent repeated BGP session deletion and reestablishment caused by route flapping, which reduces network bandwidth consumption.

Precautions

If the interface used for a BGP connection alternates between Up and Down, do not run the ebgp-interface-sensitive command.

Example

# Enable the system to automatically reset BGP sessions between the local interface and directly connected EBGP peers if the local interface goes Down.

<HUAWEI> system-view
[~HUAWEI] bgp 100
[*HUAWEI-bgp] ipv4-family unicast
[*HUAWEI-bgp-af-ipv4] ebgp-interface-sensitive