White Papers

Usage
Information
When you use this command to redistribute routes into a routing domain, the router becomes an
autonomous system (AS) boundary router. An AS boundary router does not always generate a default
route into a routing domain. The router still requires its own default route before it can generate one.
How a metric value assigned to a default route advertises depends on the metric-style command
configuration. If the metric-style command is set for Narrow mode and the metric value in the
default-information originate command is set to a number higher than 63, the metric value
advertised in the LSPs is 63. If the metric-style command is set for Wide mode, the metric value in
the default-information originate command is advertised.
Related
Commands
● redistribute — redistributes routes from one routing domain to another routing domain.
● isis metric — configures a metric for an interface.
● metric-style — sets the metric style for the router.
● show isis database — displays the IS-IS link state database.
description
Enter a description of the IS-IS routing protocol.
Syntax
description {description}
To remove the description, use the no description {description} command.
Parameters
description Enter a description to identify the IS-IS protocol (80 characters maximum).
Defaults none
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Related
Commands
router isis — Enter ROUTER mode on the switch.
distance
Define the administrative distance for learned routes.
Syntax
distance weight [ip-address mask [prefix-list]]
To return to the default values, use the no distance weight command.
Parameters
weight The administrative distance value indicates the reliability of a routing information
source. The range is from 1 to 255. (A higher relative value indicates lower
reliability. Routes with smaller values are given preference.) The default is 115.
ip-address mask (OPTIONAL) Enter an IP address in dotted decimal format and enter a mask in
either dotted decimal or /prefix format.
prefix-list (OPTIONAL) Enter the name of a prefix list name.
Defaults weight = 115
Command Modes
● ROUTER ISIS (for IPv4)
● CONFIGURATION-ROUTER-ISIS-ADDRESS-FAMILY-IPV6 (for IPv6)
Supported Modes Full–Switch
688 Intermediate System to Intermediate System (IS-IS)