R3303-HP 6600/HSR6600 Routers Layer 3 - IP Routing Command Reference

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Syntax
confederation id as-number
undo confederation id
Default
No confederation ID is configured.
Views
BGP view
Default command level
2: System level
Parameters
as-number: Specifies the number of the AS that contains multiple sub-ASs, in the range of 1 to
4294967295.
Usage guidelines
Configuring a confederation can reduce IBGP connections in a large AS. You can split the AS into
several sub-ASs, and each sub-AS remains fully meshed. These sub-ASs form a confederation. Key IGP
attributes of a route, such as the next hop, MED, or local preference, are not discarded when crossing
each sub-AS. The sub-ASs still look like a whole from the perspective of other ASs. This can ensure the
integrity of the former AS, and solve the problem of too many IBGP connections in the AS.
Examples
# Confederation 9 consists of four sub-ASs numbered 38, 39, 40 and 41. The peer 10.1.1.1 is a member
of the confederation and the peer 200.1.1.1 is outside of the confederation. Take sub AS 41 as an
example.
<Sysname> system-view
[Sysname] bgp 41
[Sysname-bgp] confederation id 9
[Sysname-bgp] confederation peer-as 38 39 40
[Sysname-bgp] group Confed38 external
[Sysname-bgp] peer Confed38 as-number 38
[Sysname-bgp] peer 10.1.1.1 group Confed38
[Sysname-bgp] group Remote98 external
[Sysname-bgp] peer Remote98 as-number 98
[Sysname-bgp] peer 200.1.1.1 group Remote98
Related commands
• confederation nonstandard
• confederation peer-as
confederation nonstandard
Use confederation nonstandard to make the router compatible with routers not compliant with RFC 3065
in the confederation.
Use undo confederation nonstandard to restore the default.