default-link-metric

Configures the metric value globally on all active Intermediate System-to-Intermediate System (IS-IS) interfaces for a specified address family.

Syntax

default-link-metric { level-1 | level-2 } value

no default-link-metric { level-1 | level-2 }

Command Default

Disabled.

Parameters

level-1: Specifies the default-link-metric parameter as Level 1.
level-2: Specifies the default-link-metric parameter as Level 2.
value: Specifies the default-link-metric value in metric style. The narrow metric range is from 1 through 63. The wide metric range is from 1 through 16777215. The default is 10.

Modes

IS-IS address-family IPv4 unicast configuration mode

IS-IS address-family IPv6 unicast configuration mode

Usage Guidelines

IS-IS is supported on the Extreme 8820, SLX 9740, SLX 9640, and SLX 9540 devices only.

This command is useful when you have a common IS-IS metric value on all IS-IS interfaces (other than the default metric value of 10). This command is not applicable to MPLS IS-IS shortcuts and tunnel interfaces.

If you change the metric style configuration, the value of the default link metric also changes. The new value of the default link metric is equal to the minimum of the configured value and the maximum value supported by the new metric style. For example, if the metric style changes from wide metric to narrow metric, and the default-link-metric value is greater than 63, the default-link-metric value changes to 63 because it is the maximum value supported in the narrow metric style. When the metric style changes from a narrow metric to a wide metric, there is no change to the default-link-metric value.

You can change the metric value for a specific interface using the isis metric command or the isis ipv6 metric command. The isis metric command configuration takes precedence over the default-link metric value command configuration.

The no form of the command resets the metric value to the default value 10.

Examples

The following example configures the IS-IS default-link-metric value to 30 for Level 1 for the IPv4 unicast address family.

device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family ipv4 unicast
device(config-router-isis-ipv4u)# default-link-metric level-1 30

The following example configures the IS-IS default-link-metric value to 30 for Level 1, and the IS-IS default-link-metric value to 40 for Level 2 for the IPv6 unicast address family.

device# configure terminal
device(config)# router isis
device(config-isis-router)# address-family-ipv6 unicast
device(config-router-isis-ipv6u)# default-link-metric level-1 30
device(config-router-isis-ipv6u)# default-link-metric level-2 40