3. Configuring IS-IS to Import External Routes
– If you want to set the cost for the imported route, you can run the import-route
protocol [ process-id ] [ cost-type { external | internal } | cost cost | tag tag |
route-policy route-policy-name | [ level-1 | level-2 | level-1-2 ] ]
*
command to
import the external routes.
– If you want to keep the original cost for the imported route, you can run the import-
route { { rip | isis | ospf } [ process-id ] | direct | unr | bgp } inherit-cost [ tag
tag | route-policy route-policy-name | [ level-1 | level-2 | level-1-2 ] ]
*
command
to import the external routes. When configuring IS-IS to retain the original cost
value of the imported route, the source routes cannot be static.
NOTE
IS-IS will advertise all imported external routes to the IS-IS areas by default.
If only some imported external routes need to be advertised, run the filter-policy export
command to set a filtering policy.
l (Optional) Configure IS-IS to advertise some external routes to the IS-IS areas.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
3. Run:
filter-policy { acl-number | acl-name acl-name | ip-prefix ip-prefix-name
| route-policy route-policy-name } export [ protocol [ process-id ] ]
IS-IS is configured to advertise specified external routes to the IS-IS areas.
NOTE
After this command is run, only external routes that meet the specified conditions can be
advertised to the IS-IS areas.
----End
6.7.5 Checking the Configuration
After IS-IS is enabled to import routes from other protocols, run the following commands to
verify that the configurations are correct.
Procedure
l Run the display isis lsdb [ { level-1 | level-2 } | verbose | { local | lsp-id | is-name symbolic-
name } ]
*
[ process-id | vpn-instance vpn-instance-name ] command to check IS-IS LSDB
information.
l Run the display isis route [ process-id | vpn-instance vpn-instance-name ] [ ipv4 ]
[ verbose | [ level-1 | level-2 ] | ip-address [ mask | mask-length ] ]
*
command to check IS-
IS routing information.
l Run the display ip routing-table ip-prefix ip-prefix-name [ verbose ] command to check
the IP routing table.
----End
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
270
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