3com S7906E Manuel De Montage

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Only active routes can be redistributed. You can use the display ip routing-table  protocol 
command to display route state information.  
For how to configure the working mode, refer to the switch-mode configuration in Device 
Management Configuration in the System Volume
 
Configuring IS-IS Route Filtering 
You can reference a configured ACL, IP prefix list or routing policy to filter routes calculated from the 
received LSPs and the routes redistributed from other routing protocols. 
Filtering routes calculated from received LSPs 
IS-IS saves the LSPs received from neighbors in the LSDB, uses the SPF algorithm to calculate the 
shortest path tree with itself as the root and installs the routes into the IS-IS routing table. 
By reference a configured ACL, IP prefix list or routing policy, you can filter the calculated routes and 
only the routes matching the filter can be added into the IS-IS routing table.  
Follow these steps to filter routes calculated from received LSPs: 
To do… 
Use the command… 
Remarks 
Enter system view 
system-view 
–– 
Enter IS-IS view 
isis [ process-id ] [ vpn-instance 
vpn-instance-name ] 
–– 
Filter routes calculated 
from received LSPs 
filter-policy { acl-number | ip-prefix 
ip-prefix-name | route-policy 
route-policy-name import 
Required 
No filtering is configured 
by default. 
 
Filtering redistributed routes 
IS-IS can redistribute routes from other routing protocols or other IS-IS processes, add them into the 
IS-IS routing table and advertise them in LSPs. 
By reference a configured ACL, IP prefix list or routing policy, you can filter redistributed routes and only 
the routes matching the filter can be added into the IS-IS routing table and advertised to neighbors.  
Follow these steps to configure the filtering of redistributed routes: 
To do… 
Use the command… 
Remarks 
Enter system view 
system-view 
–– 
Enter IS-IS view 
isis [ process-id ] [ vpn-instance 
vpn-instance-name ] 
–– 
Configure the filtering of routes 
redistributed from another 
routing protocol or IS-IS 
process 
filter-policy { acl-number | ip-prefix 
ip-prefix-name | route-policy 
route-policy-name export [ protocol 
process-id ] ] 
Required 
Not configured by 
default