Tuning And Optimizing Is-Is Network - 3Com Switch 4800G 24-Port Configuration Manual

346 C 29: IS-IS C
HAPTER
Configuring IS-IS Route
Leaking
Tuning and
Optimizing IS-IS
Network
Configuration
Prerequisites
Configuring a DIS
Priority for an Interface
ONFIGURATION
To do...
Configure a filtering
policy to filter
redistributed routes
With this feature enabled, the Level-1-2 router can advertise both Level-1 and
Level-2 area routing information to the Level-1 router.
Follow these steps to configure IS-IS route leaking:
To do...
Enter system view
Enter IS-IS view
Enable IS-IS route
leaking
n
If a filter policy is specified, only routes passing it can be advertised into Level-1
■
area.
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.
Before the configuration, accomplish the following tasks first:
Configure an IP address on each interface, and make sure all nodes are
■
reachable.
Configure basic IS-IS functions
■
On an IS-IS broadcast network, a router should be selected as the DIS at a specific
level, Level-1 or Level-2. You can specify a DIS priority at a level for an interface.
The bigger the interface's priority value, the more likelihood it becomes the DIS.
Follow these steps to configure a DIS priority for an interface:
To do...
Enter system view
Enter interface view
Specify a DIS priority for the
interface
Use the command...
filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy
route-policy-name } export [ isis
process-id | ospf process-id | rip
process-id | bgp | direct | static]
Use the command...
system-view
isis [ process-id ]
import-route isis level-2 into level-1
[ filter-policy { acl-number | ip-prefix
ip-prefix-name | route-policy
route-policy-name } | tag tag ] *
Use the command...
system-view
interface interface-type
interface-number
isis dis-priority value
[ level-1 | level-2 ]
Remarks
Optional
Not configured by default
Remarks
--
--
Required
Disabled by default
Remarks
--
--
Optional
64 by default