Command Line Reference Guide

808 | Intermediate System to Intermediate System (IS-IS)
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Parameters
Defaults
No default password. level-1 (if not otherwise specified)
Command Modes
INTERFACE
Usage
Information
To protect your network from unauthorized access, use this command to prevent unauthorized routers
from forming adjacencies.
You can assign different passwords for different routing levels by using the level-1 and level-2
keywords.
The no form of this command disables the password for Level 1 or Level 2 routing, using the
respective keywords level-1 or level-2.
This password provides limited security as it is processed as plain text.
isis priority
e
Set priority of the designated router you select.
Syntax
isis priority value [level-1 | level-2]
To return to the default values, enter the no isis priority [value] [level-1 | level-2] command.
Parameters
Defaults
value = 64; level-1 (if not otherwise specified)
Command Modes
INTERFACE
Usage
Information
You can configure priorities independently for Level 1 and Level 2. Priorities determine which router
on a LAN will be the designated router. Priorities are advertised within hellos. The router with the
highest priority will become the designated intermediate system (DIS).
Routers with 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 will become DIS even though its priority is 0.
encryption-type
(OPTIONAL) Enter 7 to encrypt the password using DES.
hmac-md5 (OPTIONAL) Enter the keyword hmac-md5 to encrypt the password using MD5.
password
Assign the interface authentication password.
level-1
(OPTIONAL) Independently configures the authentication password for Level 1. The
router acts as a station router for Level 1 routing.
This is the default.
level-2
(OPTIONAL) Independently configures the authentication password for Level 2. The
router acts as an area router for Level 2 routing.
value
This value sets the router priority. The higher the value, the higher the priority.
Range: 0 to 127
Default: 64
level-1
(OPTIONAL) Specify the priority for Level 1.
This is the default.
level-2
(OPTIONAL) Specify the priority for Level 2.