auto-cost enable

Function

The auto-cost enable command enables IS-IS to automatically calculate the interface cost based on the interface bandwidth.

The undo auto-cost enable command disables IS-IS from automatically calculating the interface cost based on the interface bandwidth.

By default, IS-IS is disabled from automatically calculating the interface cost based on the interface bandwidth.

Format

auto-cost enable [ compatible ]

undo auto-cost enable

Parameters

Parameter	Description	Value
compatible	Specifies the IS-IS to calculate the cost of an interface based on the bandwidth of the interface automatically in compatible.	-

Views

IS-IS view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After this command is run, if the cost of an IS-IS interface is not set in the interface view and no cost is set in the IS-IS view, the system automatically calculates a cost for the interface.

If the cost style of the system is wide or wide-compatible:

When auto-cost enable command is configured, Interface cost = (Bandwidth-reference/Link-bandwidth) x 10.

The cost style is set by the cost-style command. The Bandwidth-reference is set by the bandwidth-reference command. The Link-bandwidth is the interface bandwidth.

If the cost style of the system is narrow, narrow-compatible or compatible, the cost of each interface is based on the following table.

**Table 1** Relationship between the IS-IS interface cost and the bandwidth
Cost	Range of the Interface Bandwidth
60	Interface bandwidth =< 10 Mbit/s
50	10 Mbit/s < Interface bandwidth ≤ 100 Mbit/s
40	100 Mbit/s < Interface bandwidth ≤ 155 Mbit/s
30	155 Mbit/s < Interface bandwidth ≤ 622 Mbit/s
20	622 Mbit/s < Interface bandwidth ≤ 2.5 Gbit/s
10	2.5 Gbit/s < Interface bandwidth

Precautions

The priority of the cost value of the global configured by the circuit-cost command is higher than the auto cost value.

The auto-cost enable command cannot change the cost of the loopback interface.

Example

# Enable IS-IS to automatically calculate the interface cost.

<HUAWEI> system-view
[HUAWEI] isis 1
[HUAWEI-isis-1] auto-cost enable