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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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Jun 06, 2017

Hi Satish,

 

You may have to modify SIPp as below

 

</send></p> <pre><code> ACK [$contact] 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

 

 

Thanks

 

Syed Nazir

 

  • satish_txt_2254's avatar
    satish_txt_2254
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    Jun 16, 2017

    Thanks! but look like 

    tmp
    variable is missing somewhere to define.. 

    sipp -sf foo.xml -i 10.0.0.100 -d 1 -l 1 -m 1 -r 1 proxy.example.com
2017-06-16  15:47:49.584341 1497642469.584341: Variable $tmp is referenced 1 times!

    I am wondering what if some bad client send this kind of header to my proxy? is there any good solution we can use in iRules on F5 which can take care of it.. instead of fixing sipp..