Reference Guide
Version 7.5.1.0 Added IPv6 ISIS support.
Version 6.3.1.0 Introduced.
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.
S4820T
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
Command History
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.12.0 Introduced on the S4810.
Version 8.3.11.1 Introduced on the Z9000.
pre-7.7.1.0 Introduced.
Related 
Commands
router isis — Enter ROUTER mode on the switch.
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