Configuring Route Leaking - H3C S7500 Series Operation Manual

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches
II. Configuring IS-IS to filter the routes advertised by other routing protocols
Follow these steps to configure IS-IS to filter the routes advertised by other routing
protocols:
Enter system view
Enter IS-IS view
Set the policy for filtering
the routes advertised by
other protocols
Note:
The filter-policy import command filters only the IS-IS routes received from
neighbors. The routes that cannot pass the filtering will not be added to the routing
table.
The filter-policy export command only applies to the routes imported with the
import-route command. The filter-policy export command will not work if you do
not configure the import-route command to import non-IS-IS routes.
If you do not specify which type of routes are to be filtered with the filter-policy
export command, all the routes imported with the import-route command will be
filtered.

5.3.9 Configuring Route Leaking

Through route leaking, a Level-2 router can send the Level-1 area routing information
and Level-2 area routing information that it knows to a Level-1 router.
Follow these steps to configure route leaking:
To do...
Enter system view
Enter IS-IS view
Enable route leaking
To do...
system-view
isis [ tag ]
filter-policy acl-number
export [ protocol ]
Use the command...
system-view
isis [ tag ]
import-route isis level-2
into level-1 [ acl
acl-number ]
Use the command...
—
—
Required
By default, a Level-2 router
sends no routing information to
a Level-1 area.
5-12
Chapter 5 IS-IS Configuration
Remarks
—
—
Required
By default, IS-IS does not
receive the routes
advertised by other
routing protocols.
Remarks