3Com 3032 Configuration Manual page 467

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.
1 Configure 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
Specify a Confederation id
Remove a Confederation id
By default, no BGP confederation identifier is specified.
2 Configure 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
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
Configure the sub-system of e
confederation
Delete an AS from the confederation
By default, no confederation peers are specified.
3 Configure 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
Configure the non-RFC standard AS
confederation attributes.
Remove the non-RFC standard AS
confederation attributes.
By default, 3Com routers use the RFC1965 standard AS confederation attributes.
Command
confederation id as-number
undo confederation id
command to specify the confederation ID of the
Command
confederation peer-as as-number [
as-number ] ...
undo confederation peer-as as-number
[ as-number ] ...
Command
confederation nonstandard-compatible
undo confederation
nonstandard-compatible
Configuring BGP 463