RtpTx:Conn to ip:port Failed

tiendalinux · ‎12-14-2012

Hi , i have a voip network consisting only on linksys spa9xx sometimes there is no audio (RTP) while sip signalling is working.

I have disabled every form of QoS on both switches and phones trying to figure out what triggers the problem, but i haven't found a solution yet.

I have activated sip debug on the phone and when that happens the systems shows the following:

Look the line:

"Dec 14 11:54:17 172.19.4.200 RtpTx:Conn to c0a8016e:15860 Failed"

As soon as the call is triggered it shows the following:

Dec 14 11:54:17 172.19.4.200 PHN_setAudioPath(1)

Dec 14 11:54:17 172.19.4.200

Dec 14 11:54:17 172.19.4.200 [0:5060]->192.168.1.110:5060{680)

Dec 14 11:54:17 172.19.4.200 SIP/2.0 200 OK To: <sip:291@172.19.4.200:5060>;tag=7972bd8c49c0f5cei0 From: "Nestor Diaz" <sip

:800211@192.168.1.110>;tag=as54986cdc Call-ID: 5eedc3586e4565d15e5808ab26d16aa1@192.168.1.110 CSeq: 102 INVITE Via: SIP/2.

0/UDP 192.168.1.110:5060;branch=z9hG4bK54371fb6 Contact: <sip:291@172.19.4.200:5060> Server: Linksys/SPA922-5.2.8 Content-

Length: 204 Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER Supported: replaces Content-Type: application/sd

p v=0 o=- 17259 17259 IN IP4 172.19.4.200 s=- c=IN IP4 172.19.4.200 t=0 0 m=audio 10042 RTP/AVP 0 101 a=rtpmap:0 PCM

U/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 a=ptime:20 a=sendrecv

Dec 14 11:54:17 172.19.4.200

Dec 14 11:54:17 172.19.4.200 [0:5060]<<192.168.1.110:5060

Dec 14 11:54:17 172.19.4.200 ACK sip:291@172.19.4.200:5060 SIP/2.0 Via: SIP/2.0/UDP 192.168.1.110:5060;branch=z9hG4bK79bf8c0

9;rport From: "Nestor Diaz" <sip:800211@192.168.1.110>;tag=as54986cdc To: <sip:291@172.19.4.200:5060>;tag=7972bd8c49c0f5cei

0 Contact: <sip:800211@192.168.1.110> Call-ID: 5eedc3586e4565d15e5808ab26d16aa1@192.168.1.110 CSeq: 102 ACK User-Agent: A

sterisk PBX Max-Forwards: 70 Content-Length: 0

Dec 14 11:54:17 172.19.4.200

Dec 14 11:54:17 172.19.4.200 CC:Connected

Dec 14 11:54:17 172.19.4.200

Dec 14 11:54:17 172.19.4.200 [0:0]ENC INIT 0

Dec 14 11:54:17 172.19.4.200 RtpTx:Conn to c0a8016e:15860 Failed

Dec 14 11:54:17 172.19.4.200 [0:0]RTP Tx Up (pt=0->c0a8016e:15860)

Dec 14 11:54:17 172.19.4.200 [0:0]RTCP Tx Up

Dec 14 11:54:24 172.19.4.200 PHN_setAudioPath(0)

Dec 14 11:54:24 172.19.4.200

[...]

Daniele Giordano · ‎12-15-2012

Your SPA with IP address 172.19.4.200 tries to connect a device with IP address 192.168.1.110.

Is there IP connectivity between these networks?

Regards.

tiendalinux · ‎12-17-2012

Sure, the phone have connectivity to such ip address, i suspect is a problem with the switches, as with the linksys srw224p the system was working fine, but when we introduced some cisco switches sf300 the problem began to appear, i am not sure how can i fix it as i have tweak almost every switch option, another user had a similar issue, look at this thread: https://supportforums.cisco.com/thread/2057937 we also have some netgear switches on the network.

The phones belongs to 172.19.1.0/24 network and the data network to the 192.168.1.0/24 network.

r2ro_1969 · ‎01-03-2017

I'm having the same issue. Also I've introduced a cisco switche sf300 and the problem started.

My PBX vendor says that the issue is with Linksys SPA9xx phones after monitoring and analyzing the network traffic. I think he is right because when testing with softphones there is no such problem.

Did you find the solution?