R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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• peer as-path-acl
• peer filter-policy
• peer ip-prefix
• peer route-policy
• filter-policy export
• filter-policy import
• peer default-route-advertise
• rr-filter (see MPLS Command Reference)
• peer upe route-policy (see MPLS Command Reference)
To disable BGP routing policies from automatically taking effect:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Disable BGP routing policies
from automatically taking
effect.
undo auto-refresh enable
By default, when a BGP routing
policy is changed, BGP
automatically uses the new policy
to filter the incoming/outgoing
routes.
Configuring a large scale BGP network
In a large-scale BGP network, configuration and maintenance might become difficult due to large
numbers of BGP peers. To facilitate configuration, you can configure peer group, community, route
reflector, or confederation as needed. For information about configuring a peer group, see "Configuring
a B
GP peer group."
Configuration prerequisites
Peering nodes are accessible to each other at the network layer.
Configuring BGP community
By default, a router does not send the community or extended community attribute to its peers or peer
groups. When the router receives a route carrying the community or extended community attribute, it
removes the attribute before advertising the route to its peers or peer groups.
This task allows you to enable a router to advertise the community or extended community attribute to its
peers, so that you can implement route filtering and control. By using this configuration together with a
routing policy, you can add and modify the community or extended community attribute of a route. For
more information about routing policy, see "Configuring routing policies."
To configure BGP community: