3com S7906E 설치 설명서

 

2-7 

Apply a filter policy to routes 
received 

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

Optional 

By default, received routes are 
not filtered.  

Configure to permit the routes 
with their AS numbers 
contained in their AS_PATH 
attributes being the local AS 
number (this operation can also 
specify the number of the AS 
number occurrences allowed) 

peer { group-name | 
ip-address } allow-as-loop 
[ number ] 

Optional 

By default, routes with their AS 
numbers contained in their 
AS_PATH attributes being the 
local AS number are denied.   

 

AS number contained in the AS_PATH attribute can be used for route loop detect. With EBGP running 

between a MCE and a site, the routes advertised by an MCE device to the site carry the local AS 

number. So do the routes advertised by the site. In this case, you need to configure to permit the routes 

with their AS numbers contained in their AS_PATH attributes being the local AS number on MCE 

devices for the routes advertised by the site to be received and processed by the MCE device.  

 

2)  Configuration on the site 

 

The site configuration procedures vary with device model. The following takes an S7900E Ethernet 

switch as an example. As for switches from other vendors, refer to the corresponding user manuals.  

 

Follow these steps to configure the site: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Configure the PE as a peer 

peer { group-name | ip-address } 
as-number as-number 

Required 

Configure to import routes 

import-route protocol 
[ process-id ] [ med med-value | 
route-policy route-policy-name ] 
* 

Optional 

The site must advertise the 
addresses of the reachable 
VPN segments to the MCE 
connected to the site.