Juniper JUNOSE 11.2.X BGP AND MPLS, Configuration Manual

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neighbor
default-originate
•
Use to cause a BGP speaker (the local router) to send the default route 0.0.0.0/0 to
a neighbor for use as a default route.
•
Use the route-map keyword to specify outbound route maps to apply to the default
route. The route map can modify the attributes of the default route.
•
If you specify a BGP peer group by using the peerGroupName argument, all the members
of the peer group inherit the characteristic configured with this command. You cannot
override the characteristic for a specific member of the peer group.
•
Outbound policy configured for the neighbor (using the neighbor route-map out
command) is not applied to default routes that are advertised because of the neighbor
default-originate command.
•
This command takes effect immediately.
•
Use the no version to prevent the default route from being advertised by BGP. Use the
default version to remove the explicit configuration from the peer or peer group and
reestablish inheritance of the feature configuration.
•
See neighbor default-originate.
Setting the Minimum Interval Between Routing Updates
You can use the neighbor advertisement-interval command to set the minimum interval
between the sending of BGP updates. Lower values for the advertisement interval cause
route changes to be reported more quickly, but may cause routers to use more bandwidth
and processor time.
In the following example, the minimum time between sending BGP routing updates is
set to 5 seconds:
host1(config)# router bgp 100
host1(config-router)# neighbor 10.2.2.2 advertisement-interval 5
neighbor advertisement-interval
•
Use to set the minimum interval between the sending of BGP updates for a given prefix.
•
If you specify a BGP peer group by using the peerGroupName argument, all the members
of the peer group inherit the characteristic configured with this command unless it is
overridden for a specific peer.
•
This command takes effect immediately.
•
Use the no version to restore the default, 30 seconds for external peers and 5 seconds
for internal peers.
•
See neighbor advertisement-interval.
Aggregating Routes
Aggregation applies only to routes that are present in the BGP routing table. BGP
advertises an aggregate route only if the routing table contains at least one prefix that
is more specific than the aggregate. You aggregate IPv4 routes by specifying the aggregate
IP address, and IPv6 routes by specifying the aggregate IPv6 prefix.
Copyright © 2010, Juniper Networks, Inc. 58
JunosE 11.2.x BGP and MPLS Configuration Guide