[asterisk-users] SOLVED: Lost outgoing SIP packets

[Roel van Meer]

Hi everyone!

Hurray, I found the problem!
After reading http://stackoverflow.com/questions/11812731/first-udp-message-to-a-specific-remote-ip-gets-lost
I made some more traces, and the problem is that my box loses the arp entry  
of its router. In a trace, I can see ARP requests going out for the address  
of the router that are unanswered. Then, about three seconds later, the box  
stops sending packets. Seven seconds later we do get an ARP reply, and after  
that traffic flows again.

So it's not in Asterisk or in my box, but in my switch or router.

Thanks for your suggestions everyone, and have a nice weekend!

Take care,

Roel


Duncan writes:

> « HTML content follows »
> One issue that can catch you is a packet MTU limit in your path to your SIP  
> box lower than your standard MTU. You can check that with ping -s 1500 <host>  
> option
>
> Cheers Duncan
>
>
> On 01/04/16 17:12, Pete Mundy wrote:
>
>>
>>
>> Roel,
>>
>>
>> Just another thought bouncing around... Your ifconfig output was specific  
>> to eth1. Is there an eth0 too? Is there a chance packets are heading to  
>> that other interface when they shouldn't be? Running a second tcpdump on  
>> eth0 at the same time should at least disprove the theory quickly.
>>
>>
>> Pete
>>
>>
>>
>>
>>>
>>> On 1/04/2016, at 2:59 am, Roel van Meer  
>>> <<URL:mailto:roel at 1afa.com><URL:mailto:roel at 1afa.commailto:roel at 1afa.com>r 
>>> oel at 1afa.com> wrote:
>>>
>>>
>>> Thanks for the heads up, and thanks for thinking with me everyone!
>>
>>
>>
>
>