R3721-F3210-F3171-HP High-End Firewalls Network Management Configuration Guide-6PW101

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Configuring BGP route attributes
Configuration prerequisites
Create BGP connections.
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.
To specify a preferred value for routes from a peer or peer group:
Ste
p
Command Remarks
1. Enter system view. system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. 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 with each having a preference. If they find the same route, the
route found by the routing protocol with the highest preference is selected.
This task allows you to configure preferences for external, internal, and local BGP routes, and reference
a routing policy to set preferences for matching routes as needed.
To configure preferences for BGP routes:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. 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.
Configuring the default local preference
The local preference is used to determine the best route for traffic leaving the local AS. When a BGP
router obtains from several IBGP peers multiple routes to the same destination but with different next hops,
it considers the route with the highest local preference as the best route.
This task allows you to specify the default local preference for routes sent to IBGP peers.
To specify the default local preference:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A