3com S7906E 安装指导

 

2-6 

Enter system view 

— 

Enable IS-IS for a 
VPN instance and 
enter IS-IS view 

isis [ process-id ] 
vpn-instance 
vpn-instance-name 

Required 

This operation is performed on the MCE device. 
As for the corresponding configuration on the 
site, you can just enable IS-IS as usual. 

Redistribute routes 
from the remote site 
advertised by the PE 

import-route { isis 
[ process-id ] | ospf 
[ process-id ] | rip 
[ process-id ] | bgp 
[ allow-ibgp ] | direct | 
static } [ cost cost | 
cost-type { external | 
internal } | [ level-1 | 
level-1-2 | level-2 ] | 
route-policy 
route-policy-name | tag 
tag ] * 

 Required 

By default, IS-IS does not redistribute routes 
from other protocols.  

Without the level specified, the command 
redistributes routes to the Level-2 routing table 
by default.  

 

After enabling IS-IS for a VPN instance, you need also to configure to use IS-IS for routing information 

exchange.  

 

1)  Configuration on the MCE device 

Follow these steps to configure an MCE device: 

Enter system view 

— 

Enter BGP view 

bgp as-number 

— 

Enter BGP-VPN instance view 

ipv4-family vpn-instance 
vpn-instance-name 

Required 

Configure a CE as a VPN peer 

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

Required 

Redistribute routes from the 
remote site advertised by the 
PE 

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

Required 

By default, EBGP does not 
redistribute routes from other 
protocols.  

Apply a filter policy to the routes 
to be advertised  

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

Optional 

By default, routes to be 
advertised are not filtered.