3com S7906E Installationsanweisungen

 

1-31 

Enter OSPF view 

ospf [ process-id | router-id 
router-id | vpn-instance 
instance-name ]* 

— 

Configure ASBR route 
summarization 

asbr-summary ip-address { mask 
| mask-length } [ tag tag | 
not-advertise | cost cost ] * 

Required 

The command is available on an 
ASBR only. 

Not configured by default. 

 

 

z 

For details about IP prefix list, refer to Route Policy Configuration in the IP Routing Volume. 

z 

For details about route policy, refer to Route Policy Configuration in the IP Routing Volume. 

 

Since OSPF is a link state-based interior gateway protocol, routing information is contained in LSAs. 

Routes computed by OSPF can be filtered and only permitted routes are installed into the routing table. 

There are four filtering methods: 

z 

Filtering routing information by destination address through ACLs and IP address prefixes. 

z 

Filtering routing information by next hop through the filtering criteria configured with the gateway 

keyword. 

z 

Filtering routing information by destination address through ACLs and IP address prefixes and by 

next hop through the filtering criteria configured with the gateway keyword. 

z 

Filtering routing information by route policies specified by the route-policy keyword. 

Follow these steps to configure inbound route filtering: 

Enter system view 

— 

Enter OSPF view 

ospf [ process-id | router-id router-id | 
vpn-instance instance-name ] * 

— 

Configure inbound route 
filtering 

filter-policy { acl-number [ gateway 
ip-prefix-name ] | gateway ip-prefix-name | 
ip-prefix ip-prefix-name [ gateway 
ip-prefix-name ] | route-policy 
route-policy-name } import 

Required 

Not configured by default. 

 

This task is configured on an ABR to filter Type-3 LSAs to be advertised in the attached non-backbone 

area and the Type-3 LSAs to be advertised to other areas.