[asterisk-users] how to read sip debug

Steve Edwards asterisk.org at sedwards.com
Wed Jul 6 14:04:48 CDT 2016

On Wed, 6 Jul 2016, Victor Villarreal wrote:

> If you experience problems with inbound calls from a SIP trunk or 
> provider, you can type in Asterisk cli 'core set debug 3' and then 'sip 
> set debug ip xxx.xxx.xxx.xxx' where xxx is the IP of your SIP provider 
> or from where it is supposed to come call.

Another path to enlightenment is to use tcpdump to capture the packets to 
a file and then use wireshark.

Wireshark has a 'Telephony' menu and a 'SIP Flows' menu item where it will 
list all of the SIP packets. You can sort by column to help locate the 
packet of interest.

Once found, you can click on 'Flow Sequence' and it will pop up a window 
showing the 'dialog ladder' that includes that packet. As you click on 
each packet in the flow, the main wireshark window will re-position to 
that packet so you can examine it in detail.

Also on the 'SIP Flows' window is a 'Play Streams' button. Kind of scary 
how easy this is...

Thanks in advance,
Steve Edwards       sedwards at sedwards.com      Voice: +1-760-468-3867 PST

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