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

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Configuring IPv6 BGP route attributes
This section describes how to use IPv6 BGP route attributes to modify BGP routing policy. The attributes
include the following:
• IPv6 BGP protocol preference
• Default LOCAL_PREF attribute
• MED attribute
• NEXT_HOP attribute
• AS_PATH attribute
Configuration prerequisites
Before you configure IPv6 BGP route attributes, complete the following tasks:
• Enable IPv6 function.
• Configure IPv6 BGP basic functions.
Configuring IPv6 BGP preference and default LOCAL_PREF
and NEXT_HOP attributes
To ensure an IBGP peer can find the correct next hop, you can configure routes advertised to the IPv6
IBGP peer or peer group to use the local router as the next hop. If BGP load balancing is configured, the
local router specifies itself as the next hop of routes sent to an IPv6 IBGP peer or peer group regardless
of whether the peer next-hop-local command is configured.
In a "third party next hop" network where the two IPv6 EBGP peers reside in a common broadcast subnet,
the router does not change the next hop for routes sent to the IPv6 EBGP peer or peer group by default,
unless the peer next-hop-local command is configured.
To perform this configuration:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view.
bgp as-number N/A
3. Enter IPv6 address family view
or IPv6 BGP-VPN instance
view.
ipv6-family [ vpn-instance
vpn-instance-name ]
N/A
4. Configure preference values
for IPv6 BGP external,
internal, local routes.
preference { external-preference
internal-preference
local-preference | route-policy
route-policy-name }
Optional.
The default preference values of
external, internal, and local routes are
255, 255, and 130, respectively.
5. Configure the default local
preference.
default local-preference value
Optional.
The value defaults to 100.