–
If an ACL does not contain any rules, all routes matching the
route-policy
that
references the ACL will not be received or advertised by the system.
–
If the ACL referenced by the
route-policy
does not exist, all routes matching the
route-policy
will be received or advertised by the system.
–
In the configuration order, the system first matches a route with a rule that has a
smaller number and then matches the route with a rule with a larger number.
Routes can be filtered using a blacklist or a whitelist:
Route filtering using a blacklist: Configure a rule with a smaller number and
specify the action
deny
in this rule to filter out the unwanted routes. Then,
configure another rule with a larger number in the same ACL and specify the
action
permit
in this rule to receive or advertise the other routes.
Route filtering using a whitelist: Configure a rule with a smaller number and
specify the action
permit
in this rule to permit the routes to be received or
advertised by the system. Then, configure another rule with a larger number in
the same ACL and specify the action
deny
in this rule to filter out unwanted
routes.
–
Based on the IP prefix:
Run:
filter
ip-prefix
ip-prefix-name
import
The filter incoming Type 3 LSAs in the area are filtered.
–
Based on the Route-Policy:
Run:
filter
route-policy
route-policy-name
import
The filter incoming Type 3 LSAs in the area are filtered.
----End
5.5.8 (Optional) Enabling the Mesh-Group Function
The mesh-group function is used to prevent repeated flooding and save system resources.
Context
When concurrent links exist between two routers, you can enable the mesh-group function to
reduce the load on the links.
The neighboring router ID identifies each mesh group. Several concurrent links are added to a
mesh group. Flooding is implemented once in the group. You can add interfaces that meet the
following conditions to the same mesh group.
l
The interfaces belong to the same area and OSPF process.
l
The interfaces begin to exchange DD packets.
l
The interfaces are connected to the same neighboring router.
Procedure
Step 1
Run:
system-view
HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
5 OSPF Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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