Huawei Quidway S6500 Series Operation Manual page 273

Operation Manual - Routing Protocol
Quidway S6500 Series Ethernet Switches
Please note that if more than one ip-prefix item are defined, then the match mode of at
least one list item should be the permit mode. The list items of the deny mode can be
firstly defined to rapidly filter the routing information not satisfying the requirement, but
if all the items are in the deny mode, no route will pass the ip-prefix filtering. You can
define an item of permit 0.0.0.0/0 greater-equal 0 less-equal 32 after the multiple list
items in the deny mode so as to let all the other routes pass.
7.2.6 Configuring Route Filtering
I. Configuring to filter the received routes
Perform the following configuration in routing protocol view.
Define a policy to filter the routing information not satisfying the conditions while
receiving routes with the help of an ACL or address prefix-list. gateway specifies that
only the update packets from a particular neighboring router will be received.
Table 7-6 Configuring to filter the received route
Configure to filter the received routing
information distributed by the specified
address
Cancel the filtering of the received
routing information distributed by the
specified address
Configure to filter the received global
routing information
Cancel the filtering of the received
global routing information
II. Configuring to filter the distributed routes
Define a policy concerning route distribution to filter the routing information not
satisfying the conditions while distributing routes with the help of an ACL or address
ip-prefix.
Perform the following configuration in routing protocol view.
Operation
Huawei Technologies Proprietary
7-8
Chapter 7 IP Routing Policy Configuration
Command
filter-policy gateway ip-prefix-name
import
undo filter-policy
ip-prefix-name import
filter-policy { acl-number | ip-prefix
ip-prefix-name } [ gateway ] import
undo filter-policy
ip-prefix ip-prefix-name } [ gateway ]
import
gateway
{ acl-number |