peer capability-advertise graceful-restart (BGP multi-instance view) (group)

Function

The peer capability-advertise graceful-restart command enables GR for all peers in a specified group on a device. After this command is run, the device will advertise the GR capability to all the peers in the group.

The undo peer capability-advertise graceful-restart command cancels GR enabling for each peer in a specified group on a device.

By default, GR is not enabled for any peer in a specified group on a device.

Format

peer group-name capability-advertise graceful-restart

undo peer group-name capability-advertise graceful-restart

Parameters

Parameter	Description	Value
group-name	Specifies the name of a BGP peer group.	The value is a string of 1 to 47 case-sensitive characters. If spaces are used, the string must start and end with double quotation marks (").

Parameter

Description

Value

group-name

Specifies the name of a BGP peer group.

The value is a string of 1 to 47 case-sensitive characters. If spaces are used, the string must start and end with double quotation marks (").

Views

BGP multi-instance view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
bgp	write

Usage Guidelines

Usage Scenario

If the graceful-restart command is run in the BGP view to enable GR globally on a device, all the device's peer relationships are disconnected, and the device has to renegotiate the GR capability with its peers. You are therefore advised to run the peer capability-advertise graceful-restart command instead to enable GR for peers in a specified group. After the command is run, the device advertises the GR capability to all the peers in the group. This ensures that the device does not delete the routes received from these peers and forwarding entries before the GR time elapses, thereby preventing traffic interruption.

Configuration Impact

Enabling or disabling GR for each peer in a specified group on a device causes the BGP peer relationships to be disconnected and then reestablished.

Precautions

If a specified group on a device has peers that do not support GR, you are advised to enable both GR and local GR for all the peers in the group.

Example

# Enable GR for each peer in a specified group on a device. The device will then advertise the GR capability to all the peers in the group.

<HUAWEI> system-view
[~HUAWEI] bgp 100 instance a
[*HUAWEI-bgp-instance-a] group a
[*HUAWEI-bgp-instance-a] peer a capability-advertise graceful-restart