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isis priority
Assigns the priority for determining a designated router on a broadcast network.
Syntax: isis priority value [level-1 | level-2]
no isis priority
value
Priority of a router. Valid values are 0 - 255.
level-1
Priority for Level 1.
level-2
Priority for Level 2.
Description: On broadcast networks, each router is given a priority used in negotiations to determine which router should act as the designated router. Priorities are advertised in Hello packets.
The router with the highest priority (the highest number in the priority field) is chosen as the designated router. If two routers tie for the highest priority, the router with the highest MAC address is selected as the designated router. A priority of 0 reduces the chance that the router will be selected as the designated router, but does not prevent it.
Use the isis priority value command to configure the priority for the interface. If no level is specified, the command configures the password for level-1 routing only.
Use the isis priority value or the isis priority value level-1 command to configure the priority for level-1 (intra-area) routing.
Use the isis priority value level-2 command to configure the priority for level-2 (inter-area) routing.
Use the no isis priority command to set the priority at the default value of 64.
Factory Default: 64.
Command Mode: Interface 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 net command configures a NET for the routing process.
- The interface pos n/n/n identifies a specific POS interface and changes the command mode to Interface configuration.
- The ip router isis command enables the IS-IS process specified by the global router isis command on the interface.
- The isis priority value level-1 command sets the priority for level-1 routing on this interface to 70.
- The show running-config interface command displays the setting:
router(config)#router isis 0
router(config-router)#net 49.0001.0000.0000.1111.00
router(config-router)#interface pos 1/5/1
router(config-if)#ip router isis 0
router(config-if)#isis priority 70 level-1
router(config-if)#end
router#show run int
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!
interface pos 1/5/1
sonet path-trace NPI1 1/5/1
ip address 10.100.53.2 255.255.255.0
crc 16
ip router isis 0
isis priority 70 level-1
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Related Commands: ip router isis
net
router isis
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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: ISIS19.html
Last Updated: 05/10/04 at 16:35:45