3Com Switch 7750 Configuration Guide Guide

IS-IS Basic Configuration 321
n
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.
Configuring the Line
Type of an Interface
n
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.
Configuring Route
Redistribution
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.
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For more about routing information, refer to the section "Configuring an IP
Routing Policy".
Configuring Route
Filtering
IS-IS can filter received routes and advertised routes based on ACL numbers.
Configure router type
is-level { level-1 | level-1-2 |
level-2 }
Optional
By default, the router type is
level-1-2.
Table 239 Configure router type
Operation Command Description
Table 240 Configure the interface line type
Operation Command Description
Enter system view system-view -
Enter interface view
interface interface-type
interface-number
Required
Configure the line type of an
interface
isis circuit-level [ level-1 |
level-1-2 | level-2 ]
Optional
The default line type is
level-1-2.
Table 241 Configure route redistribution
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Redistribute a route
import-route protocol [ cost
value | type { external |
internal } | [ level-1 |
level-1-2 | level-2 ] |
route-policy
route-policy-name ]*
Optional
By default, IS-IS imports no
route from another protocol.