DELL 9.8(0.0) User Manual

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Usage 
Information
You can configure priorities independently for Level 1 and Level 2. Priorities 
determine which router on a LAN is the designated router. Priorities are advertised 
within hellos. The router with the highest priority becomes the designated 
intermediate system (DIS).
NOTE: Routers with a priority of 0 cannot be a designated router.
Setting the priority to 0 lowers the chance of this system becoming the DIS, but 
does not prevent it. If all the routers have priority 0, one with highest MAC address 
becomes DIS even though its priority is 0.
is-type
Configure IS-IS operating level for a router.
Syntax
is-type {level-1 | level-1-2 | level-2-only}
To return to the default values, use the no is-type command.
Parameters
level-1
Allows a router to act as a Level 1 router.
level-1-2
Allows a router to act as both a Level 1 and Level 2 router. 
This setting is the default.
level-2-only
Allows a router to act as a Level 2 router.
Defaults
level-1-2
Command 
Modes
ROUTER ISIS
Command 
History
This guide is platform-specific. For command information about other platforms, 
refer to the relevant Dell Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version
Description
9.7(0.0)
Introduced on the S6000-ON.
9.0.2.0
Introduced on the S6000.
8.3.19.0
Introduced on the S4820T.
8.3.12.0
Introduced on the S4810.
8.3.11.1
Introduced on the Z9000.
1062
Intermediate System to Intermediate System (IS-IS)