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Forum Discussion

satish_txt_2254's avatar
satish_txt_2254
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May 30, 2017

F5 looping SIP ACK packet over and over

F5 sending ACK over and over to SIP proxy server in response of 200 OK and later after max out request SIP Proxy dropping packets, it's very strange behavior, following is pcap of SIP request. You ca...
application delivery
BIG-IP
devops
LTM
sip express router
Nazir_52641's avatar
Nazir_52641
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May 31, 2017
Hi Satish,
   The request URI in ACK is in-correct it has to be set what is there in Contact header of 200 OK.

Thanks
Syed Nazir
satish_txt_2254's avatar
satish_txt_2254
Icon for Cirrus rankCirrus
Jun 01, 2017

I am using SIPp scenario to test some stuff and found F5 looping ACK, Do you know how to figure out what could be wrong? following is my scenarios file ACK section.


  
  
    

      ACK sip:[service]@[remote_ip]:[remote_port] SIP/2.0
      Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
      From: "anon" <sip:anon@foo.example.com:[local_port]>;tag=[pid]SIPpTag00[call_number]
      To: [service] <sip:[service]@foo.example.com:[remote_port]>[peer_tag_param]
      Call-ID: [call_id]
      CSeq: 1 ACK
      Contact: sip:anon@[local_ip]:[local_port]
      Max-Forwards: 70
      Subject: Performance Test
      Content-Length: 0
      P-hint: PROXY-RTP.
      User-Agent: sipp