Ok, this was a stupid thing (my fault), with -r 1000 I get easily 1000 concurrent calls that terminate in 20 seconds.
This calls just answer, play a file the first 2 seconds and then wait.
Then sipp close because of two many errors, this is the log:

   sipp: The following events occured:
   2012-03-30>-----15:17:07:081>---1333117027.081757: Discarding
   message which can't be mapped to a known SIPp call:
   BYE sip:[email protected]:52281 SIP/2.0^M
   Via: SIP/2.0/UDP 192.168.200.64:5060;branch=z9hG4bK2a711f73;rport^M
   Max-Forwards: 70^M
   From: sut <sip:[email protected]:5060>;tag=as4ad7b2e8^M
   To: sipp <sip:[email protected]:52281>;tag=2001SIPpTag0015^M
   Call-ID: [email protected]^M
   CSeq: 102 BYE^M
   User-Agent: Asterisk PBX 1.8.11.0^M
   X-Asterisk-HangupCause: Normal Clearing^M
   X-Asterisk-HangupCauseCode: 16^M
   Content-Length: 0^M
   ^M
   .
   2012-03-30>-----15:17:07:580>---1333117027.580847: Discarding
   message which can't be mapped to a known SIPp call:
   BYE sip:[email protected]:52281 SIP/2.0^M
   Via: SIP/2.0/UDP 192.168.200.64:5060;branch=z9hG4bK2a711f73;rport^M
   Max-Forwards: 70^M
   From: sut <sip:[email protected]:5060>;tag=as4ad7b2e8^M
   To: sipp <sip:[email protected]:52281>;tag=2001SIPpTag0015^M
   Call-ID: [email protected]^M
   CSeq: 102 BYE^M
   User-Agent: Asterisk PBX 1.8.11.0^M
   X-Asterisk-HangupCause: Normal Clearing^M
   X-Asterisk-HangupCauseCode: 16^M
   Content-Length: 0^M
   ^M
   .
   2012-03-30>-----15:17:07:982>---1333117027.982422: Discarding
   message which can't be mapped to a known SIPp call:
   BYE sip:[email protected]:38844 SIP/2.0^M
   Via: SIP/2.0/UDP 192.168.200.64:5060;branch=z9hG4bK66a86c70;rport^M
   Max-Forwards: 70^M
   From: sut <sip:[email protected]:5060>;tag=as43adc103^M
   To: sipp <sip:[email protected]:38844>;tag=2001SIPpTag009^M
   Call-ID: [email protected]^M
   CSeq: 102 BYE^M
   User-Agent: Asterisk PBX 1.8.11.0^M
   X-Asterisk-HangupCause: Normal Clearing^M
   X-Asterisk-HangupCauseCode: 16^M
   Content-Length: 0^M
   ^M
   .
   2012-03-30>-----15:17:08:504>---1333117028.504334: Unable to get a
   UDP socket (3).


But if I change the dialplan, remove background and wait functions, add play with a g729 audio file instead, I could do again just 80 concurrent call.




On 30/03/2012 14:50, Danny Nicholas wrote:

Change --r 100 to --r 300.

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