Troubleshooting Route Policy Configuration; Ipv4 Routing Information Filtering Failure - H3C LS-3100-52P-OVS-H3 Operation Manual

*> 9.9.9.0/24
The display above shows that Switch D has learned routes 4.4.4.0/24, 5.5.5.0/24, and 6.6.6.0/24 from
AS 100 and 7.7.7.0/24, 8.8.8.0/24, and 9.9.9.0/24 from AS 200.
3) Configure Switch D to reject routes from AS 200.
# Configure AS_PATH list 1 on Switch D.
[SwitchD] ip as-path 1 permit .*200.*
# Configure a route policy named rt1 on Switch D.
[SwitchD] route-policy rt1 deny node 1
[SwitchD] if-match as-path 1
[SwitchD] route-policy rt2 permit node 2
# On Switch D, specify route policy rt1 to filter routes received from peer 1.1.3.1.
[SwitchD] bgp 400
[SwitchD] peer 1.1.3.1 route-policy rt1 import
# Display the BGP routing table information of Switch D.
[SwitchD] display bgp routing-table
Total Number of Routes: 3
BGP Local router ID is 4.4.4.4
Status codes: * - valid, > - best, d - damped,
Network
*> 4.4.4.0/24
*> 5.5.5.0/24
*> 6.6.6.0/24
The display above shows that Switch D has learned only routes 4.4.4.0/24, 5.5.5.0/24, and 6.6.6.0/24
from AS 100.

Troubleshooting Route Policy Configuration

IPv4 Routing Information Filtering Failure

Symptom
Filtering routing information failed, while the routing protocol runs normally.
Analysis
At least one item of the IP prefix list should be configured as permit mode, and at least one node in the
Route policy should be configured as permit mode.
Solution
1) Use the display ip ip-prefix command to display IP prefix list information.
2) Use the display route-policy command to display route policy information.
1.1.3.1
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
NextHop
1.1.3.1
1.1.3.1
1.1.3.1
MED LocPrf
1-16
0 300 200i
PrefVal Path/Ogn
0 300 100i
0 300 100i
0 300 100i