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graceful-restart (Protocols BGP)

Syntax

Hierarchy Level

Description

Configure graceful restart for BGP. Graceful restart allows a routing device undergoing a restart to inform its adjacent neighbors and peers of its condition. Graceful restart is disabled by default. However, helper mode, the ability to assist a neighboring router attempting a graceful restart, is enabled by default.

To configure the duration of the BGP graceful restart period, include the restart-time statement at the [edit protocols bgp graceful-restart] hierarchy level. To set the length of time the router waits to receive messages from restarting neighbors before declaring them down, include the stale-routes-time statement at the [edit protocols bgp graceful-restart] hierarchy level.

Note:

If you configure graceful restart after a BGP session has been established, the BGP session restarts and the peers negotiate graceful restart capabilities.

Enable graceful restart mode for BGP (and other protocols) by configuring graceful-restart at the routing-options level. Note that you cannot enable graceful restart for specific protocols unless graceful restart is also enabled globally.

For example, this configuration is required to enable graceful restart:

If you want to disable graceful restart for some protocols, you can do this at the protocol’s graceful-restart command. The following configuration along with the configuration above will keep graceful restart for all protocols but BGP.

The remaining statements are explained separately. See CLI Explorer.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced before Junos OS Release 7.4.