3Com S7902E, Configuration Manual

Page: 795 / 2621

1-26
To do… Use the command… Remarks
Configure a shortcut route
network ip-address [ mask | mask-length ]
short-cut
Optional
By default, an
eBGP route
received has a
priority of 255.
Configuring BGP Route Attributes
Prerequisites
BGP connections have been created.
Specifying a Preferred Value for Routes Received
By default, routes received from a peer have a preferred value of 0. Among multiple routes that have the
same destination/mask and are learned from different peers, the one with the greatest preferred value
is selected as the route to the destination.
Follow these steps to specify a preferred value for routes from a peer or peer group:
To do… Use the command… Remarks
Enter system view system-view
—
Enter BGP view
bgp as-number
—
Specify a preferred value for
routes received from a peer or
peer group
peer { group-name | ip-address }
preferred-value value
Optional
The preferred value is 0
by default.
Configuring Preferences for BGP Routes
A router may run multiple routing protocols, each of which has a preference specified. If they find the
same route, the route found by the routing protocol with the highest preference is selected.
This task allows you configure preferences for external, internal, local BGP routes and reference a route
policy to set preferences for matching routes as needed.
Follow these steps to configure preferences for BGP routes:
To do… Use the command… Remarks
Enter system view system-view
—
Enter BGP view bgp as-number
—
Configure preferences for external,
internal, local BGP routes
preference
{ external-preference
internal-preference
local-preference
|
route-policy
route-policy-name }
Optional
The default preferences
of external, internal, and
local BGP routes are 255,
255, and 130
respectively.