3com S7906E Instruccion De Instalación

 

1-23 

For how to configure an ACL, refer to ACL Configuration in the Security Volume. 

For how to configure an IP prefix list, route policy and AS-path ACL, refer to Route Policy Configuration 

in the Routing Volume. 

Follow these steps to configure BGP route distribution filtering policies: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Configure the filtering of 
redistributed routes 

filter-policy { acl-number | 
ip-prefix ip-prefix-name } 
export [ direct | isis process-id 
| ospf process-id | rip 
process-id | | static ] 

Reference a routing policy to 
filter advertisements to a 
peer/peer group 

peer { group-name | 
ip-address } route-policy 
route-policy-name export 

Reference an ACL to filer 
advertisements to a peer/peer 
group 

peer { group-name | 
ip-address } filter-policy 
acl-number export 

Reference an AS path ACL to 
filter routing information sent to 
a peer/peer group 

peer { group-name | 
ip-address } as-path-acl 
as-path-acl-number export 

Reference an IP prefix list to 
filer routing information sent to 
a peer/peer group 

peer { group-name | 
ip-address } ip-prefix 
ip-prefix-name export 

Required to choose any; 

Not configured by default. 

You can configure a filtering 
policy as needed; 

If several filtering policies are 
configured, they are applied in 
the following sequence: 

z 

z 

z 

z 

z 

Only routes pass the first 
policy, can they go to the next, 
and only routes passing all the 
configured policies, can they be 
advertised. 

 

Only routes permitted by the configured filtering policies can be installed into the local BGP routing table. 

Members of a peer group can have different route reception filtering policies from the peer group. 

Follow these steps to configure BGP route reception filtering policies: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Filter incoming routes with an 
ACL or IP prefix list 

filter-policy { acl-number | 
ip-prefix ip-prefix-name } 
import 

Reference a routing policy to 
filter routes from a peer/peer 
group 

peer { group-name | 
ip-address } route-policy 
route-policy-name import 

Reference an ACL to filter 
routing information from a 
peer/peer group 

peer { group-name | 
ip-address } filter-policy 
acl-number import 

Reference  an AS path ACL to 
filter routing information from a 
peer/peer group 

peer { group-name | 
ip-address } as-path-acl 
as-path-acl-number import 

Required to choose any; 

No route reception filtering is 
configured by default; 

You can configure a filtering 
policy as needed; 

If several filtering policies are 
configured, they are applied in 
the following sequence: 

z 

z 

z 

z