3Com Switch 4800G 24-Port - Configuring a Large Scale Ipv6 BGP Network

478 CHAPTER 36: IPV6 BGP CONFIGURATION
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If the peer keep-all-routes command is used, all routes from the peer/peer
group will be saved regardless of whether the filtering policy is available. These
routes will be used to generate IPv6 BGP routes after soft-reset is performed.
Configuring the
Maximum Number of
Load-Balanced Routes
Follow these steps to configure the maximum number of load balanced routes:
Configuring a Large
Scale IPv6 BGP
Network
In a large-scale IPv6 BGP network, configuration and maintenance become no
convenient due to too many peers. In this case, configuring peer groups makes
management easier and improves route distribution efficiency. Peer group includes
IBGP peer group, where peers belong to the same AS, and EBGP peer group,
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 enjoy a common policy. Using the community
attribute can make a set of IPv6 BGP routers in multiple ASs enjoy the same policy,
because sending of community between IPv6 BGP peers is not limited by AS.
To guarantee connectivity between IBGP peers, you need to make them fully
meshed, but it becomes unpractical when there are too many IBGP peers. Using
route reflectors or confederation can solve it. 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. The following describes:
■ Configuring IPv6 BGP peer group
■ Configuring IPv6 BGP community
■ Configuring IPv6 BGP route reflector
Prerequisites Before configuring IPv6 BGP peer group, you have:
■ Made peer nodes accessible at network layer
■ Enabled BGP and configured router ID.
Configuring IPv6 BGP
Peer Group
Create an IBGP peer group
Follow these steps to create an IBGP group:
To do… Use the command… Remarks
Enter system view system-view -
Enter BGP view bgp as-number Required
Enter IPv6 address family view ipv6-family -
Configure the maximum
number of load balanced
routes
balance number Required
By default, no load balancing
is enabled.
To do… Use the command… Remarks
Enter system view system-view -