H3C Technologies H3C S7500E Series Switches - Manual (Page 347)

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To do… Use the command… Remarks
Enter system view system-view —
Enter BGP view bgp as-number —
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.
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:
z Configuring IPv6 BGP peer groups
z Configuring IPv6 BGP community
z Configuring IPv6 BGP route reflectors
Prerequisites
Before configuring IPv6 BGP peer groups, you need to:
z Make peer nodes accessible to each other at the network layer
z Enable BGP and configure a router ID.
Configuring IPv6 BGP Peer Group
Configuring an iBGP peer group
Follow these steps to configure an iBGP group:
To do… Use the command… Remarks
Enter system view system-view —