H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv4 Routing
H3C S7500E Series Ethernet Switches Chapter 4 IS-IS Configuration
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4.4 Configuring IS-IS Routing Information Control
4.4.1 Configuration Prerequisites
Before the configuration, accomplish the following tasks first:
z Configure an IP address on each interface, and make sure all nodes are
reachable.
z Configure basic IS-IS functions
4.4.2 Specifying a Priority for IS-IS
A router can run multiple routing protocols. When a route to the same destination is
learned by multiple routing protocols, the one with the highest protocol priority wins.
You can reference a routing policy to specify a priority for specific routes. For
information about routing policy, refer to Routing Policy Configuration.
Follow these steps to configure the IS-IS protocol priority.
To do… Use the command… Remarks
Enter system view
system-view
––
Enter IS-IS view isis [ process-id ] ––
Specify a priority for IS-IS
preference { route-policy
route-policy-name | preference } *
Optional
15 by default
4.4.3 Configuring IS-IS Link Cost
There are three ways to configure the interface link cost, in descending order of
interface costs:
z Interface cost: Assign a link cost for a single interface.
z Global cost: Assign a link cost for all interfaces.
z Automatically calculated cost: Calculate the link cost based on the bandwidth of an
interface.
Interface cost defaults to 10.
I. Configure an IS-IS cost for an interface
Follow these steps to configure an interface’s cost:
To do… Use the command… Remarks
Enter system view
system-view
––
Enter IS-IS view isis [ process-id ] ––