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BFD for VRRP product default CPCAR limit causes BFD session shaking

Publication Date:  2012-10-30 Views:  544 Downloads:  0
Issue Description

Version: S9306 V100R002C00SPC100
Topology:Two S9306 configured BFD for VRRP heartbeat packet pass by heartbeat line.
Failure: it did not configure the FSUA card at the beginning, configured 8BFD for VRRP session, it did not configure sending and receiving BFD packet time, default by 100m. Then it configured FSUA card because the client demand, default BFD packet receiving and sending time changed to 10ms at present, but all the BFD session continually.
Alarm Information
Handling Process
Configure a cpu-defend policy, modify the BFD CAR value, apply the policy at overall.
cpu-defend policy 1   
car packet-type  bfd cir  2048  
cpu-defend-policy 1 global
Root Cause
S09300 V100R002 version will do the CAR for logic BFD, default by 256K, if the sending and receiving time space is 10ms, it only can support 5-6 BFD, if more than 6 was needed, it should to change CPCAR of BFD.