3Com 3031 Command Reference Manual page 629

compare-different-as-me
confederation id
[3Com-bgp]
Syntax
d
compare-different-as-med
undo compare-different-as-med
View
BGP unicast view, BGP multicast view, VPNv4 view
Parameter
None
Description
Using the compare-different-as-med command, you can enable comparison of
MED values from different AS neighboring routes when determining the best
route. Using the undo compare-different-as-med command, you can disable the
comparison.
By default, it is disabled to compare the MED attribute values from the routing
paths of different AS peers.
If there are several routes available to one destination address, the route with
smaller MED parameter can be selected as the final route item.
You are not recommended to use this command unless you can make sure that
the ASs adopt the same IGP and routing method.
Example
Enable the comparison of the MED attribute values from different AS neighboring
route paths.
[3Com-bgp] compare-different-as-med
Syntax
confederation id as-number
undo confederation id
View
BGP view
Parameter
as-number: Number of the AS which contains multiple sub-ASs. The range is
from 1 to 65535.
Description
Using the confederation id command, you can configure confederation identifier.
Using the undo confederation id command, you can cancel the BGP confederation
specified by parameter as-number.
By default, the confederation ID is not configured.
Confederation can be adopted to solve the problem of too many IBGP full
connections in a large AS domain. The solution is, first dividing the AS domain into
BGP Configuration Commands 629