We have recently installed a Polycom RPAD device in DMZ. However, H323 calls coming from certain mobile networks (3G, 4G) dont seem to work. From the logs we can see that the signalling establishes the call but media never reaches the RPAD. Further digging into the problem, we did packet captures and can see that the firewall is dropping the RTP stream even though this is allowed by the policies. The dropped traffic is not shown on the GUI/Monitoring page.
While checking Global Counters I can see below error:
(active)> show counter global filter delta yes packet-filter yes severity drop
Global counters:
Elapsed time since last sampling: 6.947 seconds
name value rate severity category aspect description
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flow_predict_convert_rtp_drop 1013 145 drop flow pktproc Packets matching rtp/rtcp predicts of sip are dropped due to waiting for predicts merging.
flow_fpga_ingress_exception_err 9 1 drop flow offload Packets dropped: receive ingress exception error from offload processor
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Total counters shown: 2
Any help would be apprecited as this is delaying our Migrations.
Regrdas,
Ashutosh Dwivedi
