3Com 10014299 Configure a Confederation, Configure the Sub-system of E Confederation, As-number …

Configuring BGP 463

The disadvantage is that when a non-confederation scheme changes to a confederation scheme, it is required to reconfigure the router and to modify the logical topology. In addition, if the BGP strategy is not manually configured, the best path may not be selected through the confederation.

1Configure a Confederation

You can use different IGP for each sub-AS. Externally, a sub-AS is an integer and the confederation ID is the identification of the sub-AS.

Perform the following configurations in BGP view.

Table 544 Configure a Confederation

Operation	Command
Specify a Confederation id	confederation id as-number
Remove a Confederation id	undo confederation id

By default, no BGP confederation identifier is specified.

2Configure the sub-system of e confederation

The configured sub-AS is inside a confederation and each sub-AS uses fully closed network. Use confederation id command to specify the confederation ID of the AS. If the confederation ID is not configured, this configuration item is invalid.

Perform the following configurations in BGP view.

Table 545 Configure the Sub-system of E Confederation

Operation	Command
Configure the sub-system of e	confederation peer-as as-number[
confederation	as-number ] …
Delete an AS from the confederation	undo confederation peer-as as-number
	[ as-number ] …

By default, no confederation peers are specified.

3Configure the non-RFC standard AS confederation attributes.

The creation of an AS confederation in the devices from some other providers may not be consistent with the RFC1965 standard. All the routers in the confederation must be configured as using non-RFC1965 standard AS confederation attributes to create interconnections with the router using non-RFC1965 standard AS confederation.

Perform the following configurations in BGP view.

Table 546 Configure to Use the Non-RFC Standard AS Confederation Attributes.

Operation	Command
Configure the non-RFC standard AS	confederation nonstandard-compatible
confederation attributes.
Remove the non-RFC standard AS	undo confederation
confederation attributes.	nonstandard-compatible

By default, 3Com routers use the RFC1965 standard AS confederation attributes.