Configuring Is-Is Route Leaking; Tuning And Optimizing Is-Is Network; Configuration Prerequisites; Configuring A Dis Priority For An Interface - 3Com MSR 50 Series Configuration Manual

898 C 57: 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...
Redistribute routes from
another routing protocol
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.
Use the command...
import-route { isis [ process-id ] |
ospf [ process-id ] | rip
[ process-id ] | bgp [ allow-ibgp ] |
direct | static } [ cost cost |
cost-type { external | internal } |
[ level-1 | level-1-2 | level-2 ] |
route-policy route-policy-name |
tag tag ] *
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 ] [ vpn-instance
vpn-instance-name ]
import-route isis level-2 into
level-1 [ filter-policy { acl-number |
ip-prefix ip-prefix-name |
route-policy route-policy-name } |
tag tag ] *
Remarks
Required
No route is redistributed
by default.
If no level is specified,
routes are redistributed
into the Level-2 routing
table by default.
Optional
Not configured by
default
Remarks
--
--
Required
Disabled by default