<div dir="ltr">Dear Sir,<br><br>What I'm interested to is to know how much time the rtp packets takes from the time it access the asterisk server,to when it'll leave<br>Is this function or variable exist anywhere?<br>
<br>Regards<br><div class="gmail_quote">On Mon, Dec 15, 2008 at 10:55 PM, Jeff LaCoursiere <span dir="ltr"><<a href="mailto:jeff@jeff.net">jeff@jeff.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
No. TTL in the header is about hop traversal. Each IP router that<br>
forwards the packet will reduce this number in the live packet until it<br>
reaches zero, when it will be dropped. I believe this is to eliminate<br>
route loops creating packet storms.<br>
<br>
FWIW this is how traceroute works - it sends out packets with continually<br>
increasing TTLs and the router that drops the packet will send back a<br>
notification, so you can "trace" each hop...<br>
<br>
What is it you are trying to do or measure?<br>
<div><div></div><div class="Wj3C7c"><br>
j<br>
<br>
On Mon, 15 Dec 2008, michel freiha wrote:<br>
<br>
> Dear Sir,<br>
><br>
> There is no relation between TTL and the latency on asterisk server?<br>
><br>
> Regards<br>
><br>
> On Mon, Dec 15, 2008 at 10:39 PM, Jeff LaCoursiere <<a href="mailto:jeff@jeff.net">jeff@jeff.net</a>> wrote:<br>
><br>
>><br>
>> TTL is part of the UDP header (Time To Live). It isn't really about the<br>
>> voice at all.<br>
>><br>
>> Length 345 is the number of bytes in the packet.<br>
>><br>
>> j<br>
>><br>
>> On Mon, 15 Dec 2008, michel freiha wrote:<br>
>><br>
>>> *Dear All,<br>
>>> I run the below tcp dump on my asterisk server<br>
>>><br>
>>> tcpdump -i eth0 -n -s0 -v udp port 5060<br>
>>><br>
>>> I got the following result<br>
>>><br>
>>> 20:29:48.596867 IP (tos 0x10, ttl 64, id 0, offset 0, flags [DF], proto<br>
>> 17,<br>
>>> length: 373) SIP_PROXY_IP.5060 > Asterisk_IP.5060: UDP, length 345<br>
>>><br>
>>> What i need to know please what TTL means specifically and what is the<br>
>> best<br>
>>> value og TTL and what is the lengh vale mean<br>
>>><br>
>>> Regards*<br>
>>><br>
>><br>
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</div></div></blockquote></div><br></div>