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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 3 OSPF Configuration Commands
3-32
3.1.25 filter-policy export
Syntax
filter-policy { acl-number | ip-prefix ip-prefix-name } export [ protocol ]
undo filter-policy { acl-number | ip-prefix ip-prefix-name} export [ protocol ]
View
OSPF view
Parameter
acl-number: Basic or advanced ACL number, in the range of 2,000 to 3,999.
ip-prefix-name: Name of the address prefix list, containing 1 to 19 characters.
protocol: Routing protocol advertising the routing information. At present, it can be
direct, rip, bgp, isis or static.
Description
Use the filter-policy export command to enable the ASBR routers to filter the
external routes imported to OSPF. This command is applicable only to ASBR routers
Use the undo filter-policy export command to cancel the filtering rule configured.
By default, OSPF does not receive routes advertised by the other routing protocols.
Note:
z The filter-policy export command take effect on only the routes imported to the
local device through the import-route command. If the filter-policy export
command is configured while the import-route command is not configured to
import other external routes (including OSPF routes in different processes), the
filter-policy export command does not take effect.
z If the protocol argument is not specified in the filter-policy export command, this
command takes effect on all the routes imported to the local device through the
import-route command.
Related command: acl, ip ip-prefix.
Example
# Configure OSPF to advertise only the routing information permitted by acl 2000.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] acl number 2000
[3Com-acl-basic-2000] rule permit source 11.0.0.0 0.255.255.255