[Serusers] Troubles matching 487's to subsequent ACKs

Hi, We have recently switched to 0.8.11 for our production server and I have noticed that ser no longer can match 487 Request cancelled reply to subsequent ACK, at least in the cases when ATA186 with latest firmware 2.16 is used as the originating UA. I wonder who is responsible for this: ATA or SER. The only strange thing that I see in the log is that ATA includes the following extra parameters into the first Via hf: rport=5060;received=195.234.212.178. ATA->SER INVITE sip:380445732729@64.180.102.72;user=phone SIP/2.0 Via: SIP/2.0/UDP 192.168.0.253:5060 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone> Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 INVITE Contact: <sip:380442466396@192.168.0.253:5060;user=phone;transport=udp> User-Agent: Cisco ATA 186 v2.16 ata18x (030509a) Authorization: Digest username="380442466396",realm="64.180.102.72",nonce="3f168 ef30be264b823354f5b14bef51f8c3636de",uri="sip:380445732729@64.180.102.72",respon se="d5a544d0eb3103e9f67b4e2af839054d" Expires: 300 Content-Length: 257 Content-Type: application/sdp o=380442466396 40288 40288 IN IP4 192.168.0.253 s=ATA186 Call c=IN IP4 192.168.0.253 t=0 0 m=audio 13000 RTP/AVP 4 8 0 101 a=rtpmap:4 G723/8000/1 a=rtpmap:8 PCMA/8000/1 a=rtpmap:0 PCMU/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 SER->ATA SIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone> Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 INVITE Server: Sip EXpress router (0.8.11rc1 (i386/freebsd)) Content-Length: 0 SER->ATA SIP/2.0 183 Session Progress Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 To: <sip:380445732729@64.180.102.72;user=phone>;tag=d429e01d From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 INVITE Record-Route: <sip:380445732729@64.180.102.72;lr> Content-Type: application/sdp Content-Length: 283 o=CiscoSystemsSIP-GW-UserAgent 503 692 IN IP4 212.119.160.61 s=SIP Call c=IN IP4 212.119.160.61 t=0 0 m=audio 17182 RTP/AVP 4 19 101 c=IN IP4 212.119.160.61 a=rtpmap:4 G723/8000 a=rtpmap:19 CN/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:4 annexa=no a=fmtp:101 0-15 ATA->SER CANCEL sip:380445732729@64.180.102.72;user=phone SIP/2.0 Via: SIP/2.0/UDP 192.168.0.253:5060 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone> Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 CANCEL User-Agent: Cisco ATA 186 v2.16 ata18x (030509a) Authorization: Digest username="380442466396",realm="64.180.102.72",nonce="3f168 ef30be264b823354f5b14bef51f8c3636de",uri="sip:380445732729@64.180.102.72",respon se="2953586e366141c5b8062cdfe7678357" Content-Length: 0 SER->ATA SIP/2.0 200 cancelling Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone>;tag=7fe8c93a8cb9c58b2cde45b60b0e 5d5c-7fd1 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 CANCEL Server: Sip EXpress router (0.8.11rc1 (i386/freebsd)) Content-Length: 0 SER->ATA SIP/2.0 487 Request cancelled Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone>;tag=7fe8c93a8cb9c58b2cde45b60b0e 5d5c-7fd1 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 INVITE Server: Sip EXpress router (0.8.11rc1 (i386/freebsd)) Content-Length: 0 ATA->SER ACK sip:380445732729@64.180.102.72;user=phone SIP/2.0 Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone>;tag=7fe8c93a8cb9c58b2cde45b60b0e 5d5c-7fd1 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 ACK User-Agent: Cisco ATA 186 v2.16 ata18x (030509a) Content-Length: 0 SER->ATA SIP/2.0 487 Request cancelled Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone>;tag=7fe8c93a8cb9c58b2cde45b60b0e 5d5c-7fd1 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 INVITE Server: Sip EXpress router (0.8.11rc1 (i386/freebsd)) Content-Length: 0 ATA->SER ACK sip:380445732729@64.180.102.72;user=phone SIP/2.0 Via: SIP/2.0/UDP 192.168.0.253:5060;rport=5060;received=195.234.212.178 From: <sip:380442466396@64.180.102.72;user=phone>;tag=4197094684 To: <sip:380445732729@64.180.102.72;user=phone>;tag=7fe8c93a8cb9c58b2cde45b60b0e 5d5c-7fd1 Call-ID: 2777157492(a)192.168.0.253 CSeq: 2 ACK User-Agent: Cisco ATA 186 v2.16 ata18x (030509a) Content-Length: 0 An so on (487->ACK->487->ACK until timeout hits). -Maxim