3Com Switch 7750 Configuration Guide Guide

320 CHAPTER 35: IS-IS CONFIGURATION
Configuring a NET A NET defines the current IS-IS area address and router system ID.
Enabling IS-IS on the
Specified Interface
Configuring DIS Priority In a broadcast network, IS-IS needs to select a router as DIS.
When a DIS needs to be selected from the IS-IS neighbors on the broadcast
network, the Level-1 DIS and Level-2 DIS should be selected respectively. The
higher priority a DIS has, the more likely it is to be chosen. If two or more routers
with the highest priorities exist on the broadcast network, the router that has the
greatest MAC address will be chosen. For adjacent routers that have the same
priority of 0, the router that has the greatest MAC address will still be chosen.
Level-1 DIS and Level-2 DIS are selected respectively. You can set different priorities
for DISs at different levels to be selected.
Configuring Router Type
Configure ISIS isis [ tag ]
Required
By default, no IS-IS routing
process is enabled.
Table 235 Enabling IS-IS
Operation Command Description
Tabl e 236 Configure a NET
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] -
Enable network entity network-entity net Required
Tabl e 237 Enable IS-IS on the specified interface
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Enable IS-IS. isis enable [ clns | ip ] [ tag ] Required
Tabl e 238 Configure DIS priority
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
-
Assign a DIS priority
isis dis-priority value [
level-1 | level-2 ]
Optional
The default DIS priority is 64.
Tabl e 239 Configure router type
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required