3Com Switch 7700 Configuration Manual page 165

In BGP, no authentication is performed in setting up TCP connections, by default.
The multicast extension configured in BGP view is also available in MBGP, because
they use the same TCP link.
Configuring the Route Filtering of a Peer (Group)
The Switch 7700 supports filtering imported and advertised routes to peers
(groups) through the route-policy, AS path list, ACL, and ip prefix list.
The route filtering policy of advertised routes, configured for each member of a
peer group, must be the same as that of the peer group. However, their route
filtering policies of ingress routes may be different.
Perform the following configurations in BGP view.
Configuring the Route Policy for a Peer (Group)
Table 107 Configuring the Route Policy for a Peer (Group)
Operation
Configure the ingress route policy for a peer
(group)
Remove the ingress route policy of a peer
(group)
Configure egress route policy for a peer group peer group-name route-policy
Remove the egress route policy of a peer
group
By default, no route policy is applied to a peer or a peer group.
Configuring a Route Filtering Policy Based on IP ACL for a Peer (Group).
Table 108 Configuring a Route Filtering Policy Based on IP ACL for a Peer (Group)
Operation
Configure the ingress route filtering policy
based on IP ACL for a peer (group)
Remove the ingress route filtering policy based
on IP ACL of a peer (group)
Configure the egress route filtering policy
based on IP ACL for a peer group
Remove the egress route filtering policy based
on IP ACL for a peer group
By default, route filtering based on IP ACL for a peer or peer group is disabled.
Configuring Route Filtering Policy Based on an AS Path List for a Peer
(Group).
Table 109 Configuring Route Filtering Policy Based on an AS Path List for a Peer (Group)
Operation
Configure the ingress route filtering policy
based on AS path list for a peer (group)
Command
peer { peer-address | group-name }
route-policy route-policy-name import
undo peer { peer-address | group-name }
route-policy policy-name import
route-policy-name export
undo peer group-name route-policy
route-policy-name export
Command
peer { peer-address | group-name }
filter-policy acl-number import
undo peer { peer-address | group-name }
filter-policy acl-number import
peer group-name filter-policy acl-number
export
undo peer group-name filter-policy
acl-number export
Command
peer { peer-address | group-name }
as-path-acl acl-number import
BGP 157