H3C S7500 Series Operation Manual page 311

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches
III. Disable the receiving of host routes
In some special cases, the router can receive a lot of host routes from the same
network segment, and these routes are of little help in route addressing but consume
a large amount of network resources. After host route receiving is disabled, a router
can refuse any incoming host routes.
Follow these steps to disable the receiving of host routes:
Enter system view
Enter RIP view
Disable the receiving of
host routes
IV. Configure inbound/outbound route filtering policies
Route filtering is supported by the router. You can filter received or advertised routes
by configuring the inbound and outbound route filtering policies via referencing an
ACL and IP prefix list. You can also specify to receive only routes from a specified
neighbor.
Follow these steps to configure the filtering of incoming/outgoing routes:
To do...
Enter system view
Enter RIP view
Configure to filter
incoming routes
Configure to filter
outgoing routes
To do...
system-view
rip
undo host-route
Use the command...
system-view
rip
filter-policy { acl-number |
[ ip-prefix ip-prefix-name ]
[ gateway ip-prefix-name ] }
import [ interface interface-type
interface-number ]
filter-policy route-policy
route-policy-name import
filter-policy { acl-number |
ip-prefix ip-prefix-name } export
[ protocol | interface
interface-type interface-number ]
filter-policy route-policy
route-policy-name export
Use the command...
3-7
Chapter 3 RIP Configuration
Remarks
—
—
Required
By default, the router
receives host routes.
Remarks
—
—
Optional
By default, RIP does not
filter any incoming routes.
The gateway keyword is
used to filter the incoming
routes advertised from a
specified address.
Optional
By default, RIP does not
filter any outgoing routes.