Owner's Manual

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Figure 13-100. Routing Instances -> VRF Instances - BGP
This screen has the following fields:
-
Name —This identifies this BGP Group within this routing instance. The name can contain
letters, numbers, and hyphens (-) and can be up to 255 characters long.
-
Ty p e —Specify the type of BGP peer group, Internal or External .
-
Override AS Number —Compare the AS path of an incoming advertised route with the AS
number of the BGP peer under the group and replace all occurrences of the peer AS number
in the AS path with its own AS number before advertising the route to the peer.
Enabling the AS override feature allows routes originating from an AS to be accepted by a
router residing in the same AS. Without AS override enabled, the router refuses the route
advertisement once the AS path shows that the route originated from its own AS. This is done
by default to prevent route loops. The as-override statement overrides this default behavior.
CAUTION:
Enabling the AS override feature may result in routing loops. Use this feature only for specific
applications that require this type of behavior, and in situations with strict network control. One
application is the IGP protocol between the provider edge router and the customer edge router in a
virtual private network. For more information, see the JUNOS MPLS Applications Configuration Guide.
- Peer AS —Specify the neighbor (peer) AS number.
-
Graceful Restart —Configure graceful restart for BGP.
-
Restart Time —Time period when the restart is expected to be complete. Range: 1 through 600
seconds
-
Stale Routes Time —Maximum time that stale routes are kept during restart. Range: 1 through
600 seconds
-
Disable Graceful Restart —Disables graceful restart for BGP.