INVITE not getting detected sometimes

[enlaichu]

We're seeing about 3-5% of calls not getting recorded. Troubleshooting indicates that the INVITE is not getting detected by orkaudio. Subsequent SIP messages in the transaction are detected but not the initial INVITE. It's happening on multiple servers so doesn't appear to be a single bad interface.

Is this a known issue / any ideas for a fix?

[kingster]

Is this reproducible? Do you have a pcap capture which recreates this?

I had observed similar behavior when the invite packets were very large, and was being split into multiple fragments. Do you have fragment reassemble enabled?

The config for that is IpFragmentsReassemble under VoIpPlugin

<VoIpPlugin>
	<IpFragmentsReassemble>true</IpFragmentsReassemble>