Configuring Ipv6 Is-Is To Advertise A Default Route - Huawei S6700 Series Configuration Manual

S6700 Series Ethernet Switches
Configuration Guide - IP Routing
Procedure
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6.14.3 Configuring IPv6 IS-IS to Advertise a Default Route

To forward all traffic in an IS-IS area through a default route, configure IS-IS on a Level-1-2
device to advertise the default route.
Context
Only the route ::/0 can be advertised as a default route on a Level-1-2 device. All traffic destined
for other areas is first forwarded to the Level-1-2 device.
To ensure successful traffic forwarding, external routes must be learned on the Level-1-2 device.
Issue 01 (2012-03-15)
Configure the IS-IS preference value.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
3. Run:
ipv6 preference preference
The IS-IS preference value is configured.
NOTE
A smaller preference value indicates a higher preference.
The default IS-IS preference value is 15.
Configure preference values for specified IS-IS routes.
1. Run:
system-view
The system view is displayed.
2. Run:
isis [ process-id ]
The IS-IS view is displayed.
3. Run:
ipv6 preference route-policy route-policy-name preference
The preference values are configured for the specified IS-IS routes.
NOTE
preference takes effect only for IS-IS routes that match the specified routing policy.
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.
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