H3C Technologies H3C S7500E Series Switches - Manual (Page 165)

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To do… Use the command… Remarks
Configure the network type for the interface
as P2P
isis circuit-type p2p
Optional
By default, the
network type of an
interface depends on
the physical media.
The network type of a
VLAN interface is
broadcast.
You can only perform this configuration for a broadcast network with only two attached routers.
Configuring IS-IS Routing Information Control
Configuration Prerequisites
Before the configuration, accomplish the following tasks:
z Configure network layer addresses for interfaces, and make sure adjacent nodes are reachable to
each other at the network layer.
z Enable IS-IS.
Configuring IS-IS Link Cost
The IS-IS cost of an interface is determined in the following order:
z ISIS cost specified in interface view.
z ISIS cost specified in system view. The cost is applied to the interfaces associated to the IS-IS
process.
z Automatically calculated cost: When the cost style is wide or wide-compatible, IS-IS
automatically calculates the cost using the formula: interface cost= (bandwidth reference
value/interface bandwidth) ×10. When the cost style is of another type: if the interface bandwidth
does not exceed 10 Mbps, the interface cost equals 60; if the interface bandwidth does not exceed
100 Mbps, the interface cost equals 50; if the interface bandwidth does not exceed 155 Mbps, the
interface cost equals 40; if the interface bandwidth does not exceed 622 Mbps, the interface cost
equals 30; if the interface bandwidth does not exceed 2500 Mbps, the interface cost equals 20; if
the interface bandwidth exceeds 2500 Mbps, the interface cost equals 10.
If none of the above costs is used, a default cost of 10 applies.
Configuring an IS-IS cost for an interface
Follow these steps to configure a cost for an interface: