3Com 7757 Configuration Manual page 335

Configuring Router Type
n
Configuring the Line
Type of an Interface
n
Configuring IS-IS Route
Redistribution
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.
Table 255 Configure DIS priority
Operation
Enter system view
Enter interface view
Assign a DIS priority
Table 256 Configure router type
Operation
Enter system view
Enter IS-IS view
Configure router type
Changing interface line type makes sense only when the interface is on a Level-1-2
router. Otherwise, the router type determines the adjacency hierarchy that can be
established.
Table 257 Configure the interface line type
Operation
Enter system view
Enter interface view
Configure the line type of an
interface
Changing interface line type makes sense only when the interface is on a Level-1-2
router. Otherwise, the router type determines the adjacency hierarchy that can be
established.
IS-IS processes the routes discovered by other routing protocols as routes outside a
routing domain. You can specify the default cost for IS-IS to redistribute routes
from another routing protocol.
You can configure IS-IS to redistribute routes to Level-1, Level-2, and Level-1-2.
Command
system-view
interface interface-type
interface-number
isis dis-priority value
[ level-1 | level-2 ]
Command
system-view
isis [ tag ]
is-level { level-1 | level-1-2 |
level-2 }
Command
system-view
interface interface-type
interface-number
isis circuit-level [ level-1 | level-1-2 |
level-2 ]
IS-IS Basic Configuration
Description
-
-
Optional
The default DIS priority is 64.
Description
-
Required
Optional
By default, the router type is
level-1-2.
Description
-
Required
Optional
The default line
type is level-1-2.
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