HP VPN Firewall Appliances Network Management Command Reference

450
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.
Syntax
confederation nonstandard
undo confederation nonstandard
Default
All routers in the confederation comply with RFC 3065.
Views
BGP view
Default command level
2: System level
Usage guidelines
All devices should be configured with this command to interact with those nonstandard devices in the
confederation.