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

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NOTE:
• The peer ttl-security hops command and the peer ebgp-max-hop command are mutually exclusive.
• You must configure GTSM on both the local and peer devices, and you can specify different hop-coun
t
values in a valid range for them.
Configuring a large-scale IPv6 BGP network
In a large-scale IPv6 BGP network, configuration and maintenance become inconvenient because of too
many peers. Configuring peer groups makes management easier and improves route distribution
efficiency. Peer groups include IBGP peer groups, where peers belong to the same AS, and EBGP peer
groups, where peers belong to different ASs. If peers in an EBGP group belong to the same external AS,
the EBGP peer group is a pure EBGP peer group, and if not, a mixed EBGP peer group.
In a peer group, all members have a common policy. Using the community attribute can make a set of
IPv6 BGP routers in multiple ASs have the same policy, because community sending between IPv6 BGP
peers is not limited by AS.
To ensure connectivity between IBGP peers, make them fully meshed, but it becomes impractical when
too many IBGP peers exist. Using route reflectors or confederation can solve this issue. In a large-scale
AS, both of them can be used.
Confederation configuration of IPv6 BGP is identical to that of BGP4, so it is not mentioned here.
Configuration prerequisites
Before you configure a large-scale IPv6 BGP network, complete the following tasks:
• Make peer nodes accessible to each other at the network layer.
• Enable BGP and configure a router ID.
Configuring IPv6 BGP peer group
Configuring an IBGP peer group
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.
ipv6-family N/A
4. Create an IBGP peer group.
group ipv6-group-name [ internal ] N/A
5. Add a peer into the group.
peer ipv6-address group
ipv6-group-name [ as-number
as-number ]
Not added by default.
Creating a pure EBGP peer group