F3215-HP Load Balancing Module Network Management Command Reference-6PW101

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Default command level
2: System level
Usage guidelines
If several paths to one destination are available, the path with the smallest MED is selected.
Do not use this command unless associated ASs adopt the same IGP protocol and routing selection
method.
Examples
# In BGP view, enable the comparison of the MED for paths from peers in different ASs.
<Sysname> system-view
[Sysname] bgp 100
[Sysname-bgp] compare-different-as-med
confederation id
Use confederation id to configure a confederation ID.
Use undo confederation id to remove a specified confederation.
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