Operation Manual – Routing Protocol
Quidway S5600 Series Ethernet Switches-Release 1510
Chapter 6 IP Routing Policy Configuration
Huawei Technologies Proprietary
6-12
6.9 Troubleshooting IP Routing Policy
Symptom: Routing information cannot be filtered when the routing protocol runs
normally.
Solution: Check to see the following requirements are satisfied.
At least one node in a route-policy should be in
permit
mode. When a route-policy is
used to filter routing information, if a piece of routing information filters through no node
in the route-policy, it means that the route information does not pass the filtering of the
route-policy. Therefore, when all the nodes in the route-policy are in the
deny
mode, no
routing information will pass the filtering of the route-policy.
At least one item in an ip-prefix list should be in
permit
mode. The items in
deny
mode
can be defined first to rapidly filter out the routing information not meeting the condition.
However, if all the items are in the
deny
mode, no route will pass the ip-prefix filtering.
You can define the item “
permit
0.0.0.0 0 less-equal 32” after multiple items in the
deny
mode for all other routes to pass the filtering (if less-equal
32 is not specified, only the
default route will be matched).