max-areas

---

Specifies the maximum number of IS-IS areas that can be configured on this router.

Syntax: max-areas number

no max-areas

number

Sets the maximum number of areas in the network supported by IS-IS Valid values are 1 - 255.

Description: By default, IS-IS permits a maximum of three areas that can be defined on a router.

NOTE If you enter a group of NETs for a single router with different system ids, original system ID remains in effect for the system. However, if the original NET is later removed, the system ID reverts to the previously defined system identifier. This can result in routing delays for IS-IS.

If you exceed the maximum number of areas specified either by the default or by the max-areas command, the following error message is displayed:

    % Max number of nets already set

Use the max-areas number command to configure the maximum number of areas that can be configured on this router.

Use the no max-areas command to configure the maximum number of areas that can be configured on this router at the default value of 3.

Factory Default: 3 areas.

Command Mode: Router configuration.

Example: In the following example:

• The router isis command enables IS-IS on the router, specifies an IS-IS instance, and changes the command mode to Router configuration,
  
  
• The max-areas number command configures the maximum number of IS-IS areas at 5,
  
  
• The 5 net commands configure 5 NETs, each in a different area,
  
  
• The show isis command displays the setting for maximum areas:
  
  

router(config)#router isis net2 router(config-router)#max-areas 5 router(config-router)#net 41.0001.0000.0000.0001.00 router(config-router)#net 42.0001.0000.0000.0001.00 router(config-router)#net 43.0001.0000.0000.0001.00 router(config-router)#net 44.0001.0000.0000.0001.00 router(config-router)#net 45.0001.0000.0000.0001.00 router(config-router)#end router#show isis

Global ISIS information ISIS process tag: net2 System ID: 1000.5000.0001   NET: 41.0001.0000.0000.0001.00 NET: 42.0001.0000.0000.0001.00 NET: 43.0001.0000.0000.0001.00 NET: 44.0001.0000.0000.0001.00   NET: 44.0001.0000.0000.0001.00 Maximum number of areas: 5 . . .

Related Commands: net
show isis

Copyright © 2004 Avici Systems Inc.
Avici® and TSR® is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are trademarks of Avici Systems Inc.

   Source File Name: ISIS.fm
    HTML File Name: ISIS29.html
    Last Updated: 05/10/04 at 16:35:45

Please email suggestions and comments to: doc@avici.com