H3C LS-3100-52P-OVS-H3 Operation Manual - page 818
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*> 9.9.9.0/24 1.1.3.1 0 300 200i
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,
h - history, i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Network NextHop MED LocPrf PrefVal Path/Ogn
*> 4.4.4.0/24 1.1.3.1 0 300 100i
*> 5.5.5.0/24 1.1.3.1 0 300 100i
*> 6.6.6.0/24 1.1.3.1 0 300 100i
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.