3com S7906E Manuel De Montage
1-24
Configuring IS-IS Route Leaking
With IS-IS route leaking enabled, the Level-1-2 router can advertise the routing information of other
Level-1 areas and Level-2 area routing information to Level-1 routers.
Follow these steps to configure IS-IS route leaking:
To do…
Use the command…
Remarks
Enter system view
system-view
––
Enter IS-IS view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
vpn-instance-name ]
––
Enable IS-IS route
leaking
leaking
import-route isis level-2 into level-1 [ filter-policy
{ acl-number | ip-prefix ip-prefix-name |
route-policy route-policy-name } | tag tag ] *
{ acl-number | ip-prefix ip-prefix-name |
route-policy route-policy-name } | tag tag ] *
Required
Disabled by
default
default
z
If a filter policy is specified, only routes passing it can be advertised into Level-1 area.
z
You can specify a routing policy in the import-route isis level-2 into level-1 command to filter
routes from Level-2 to Level-1. Other routing policies specified for route reception and
redistribution does not affect the route leaking.
Tuning and Optimizing IS-IS Networks
Configuration Prerequisites
Before the configuration, accomplish the following tasks:
z
Configure IP addresses for interfaces, and make adjacent nodes reachable to each other at the
network layer.
z
Enable IS-IS.
Specifying Intervals for Sending IS-IS Hello and CSNP Packets
Follow these steps to configure intervals for sending IS-IS hello and CSNP packets:
To do…
Use the command…
Remarks
Enter system view
system-view
––
Enter interface view
interface interface-type
interface-number
interface-number
––
Specify the interval for sending
hello packets
hello packets
isis timer hello seconds
[ level-1 | level-2 ]
[ level-1 | level-2 ]
Optional
10 seconds by default
Specify the interval for sending
CSNP packets on the DIS of a
broadcast network
CSNP packets on the DIS of a
broadcast network
isis timer csnp seconds
[ level-1 | level-2 ]
[ level-1 | level-2 ]
Optional
10 seconds by default