Huawei S6700 Series

NOTE
Configuring static default routes can also achieve the function of interaction between different routing
protocols, but require large configurations and are difficult to manage.
If multiple Level-1-2 devices are deployed, a routing policy can be configured to allow only the Level-1-2
device that meets the specified conditions to advertise a default route, preventing blackhole routes.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
isis [ process-id ]
The IS-IS view is displayed.
Step 3 Run:
default-route-advertise [ always | match default | route-policy route-policy-name ]
[ cost cost | tag tag | [ level-1 | level-1-2 | level-2 ] ]
*
[ avoid-learning ]
IS-IS is configured to advertise a default route.
----End
6.7.4 Configuring IPv4 IS-IS to Import External Routes
If devices in an IS-IS area need to learn external routes, configure IS-IS on a Level-1-2 device
of this area to import external routes.
Context
If IS-IS is configured on a Level-1-2 device to advertise a default route, all traffic in IS-IS areas
will be forwarded by this Level-1-2 device. This will burden this Level-1-2 device because no
external route can be learned on the devices in the IS-IS areas.
If multiple Level-1-2 devices are deployed, optimal routes to other areas need to be selected. To
ensure optimal routes are selected, all the other devices in the IS-IS areas must learn all or some
external routes.
Routing policies can be configured to import or advertise external routes that meet specified
conditions to the IS-IS areas.
Procedure
l Configure IS-IS to import external routes.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
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.
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