[asterisk-users] IAX2 and INVAL packets

[Sebastian]

On 11/18/2010 08:01 PM, Sebastian wrote:
> Is anybody here familiar with the meaning of INVAL packets for IAX2?
>
> Every few days I get a dropped outgoing call in the middle of the
> conversation (the outgoing call has been connected for few minutes) when
> an incoming call comes in. The log reads the following when this happens:
>

Just answering myself here. After spending few months troubleshooting 
this completely erratic fault - it turns out that it was the ADSL 
router. I still don't know for certain the exact mechanism of the fault 
- but it looks like my IAX provider would receive some packets which 
were invalid from my direction - and hang-up calls randomly. There was 
no rhyme or reason for it. Sometime it would happen few times a day, 
sometime once every few days. Sometime 10 seconds into the call, 
sometime when another call would come in. But it always seemed to be 
connected with the "received INVAL" message in the logs.

I replaced the router (a TP-Link ADSL router) with a Belkin router 
(that's what I had to hand) and everything is fine now for more then a 
week. The other router did not give any signs of trouble otherwise - all 
other Internet, email, openvpn and any other traffic going through it 
was fine. But somehow it would generate this problem with Asterisk.

I just thought it might help somebody some day.

Sebastian

>
>
> [Nov 17 15:25:04] DEBUG[5138] chan_iax2.c: Immediately destroying 2963,
> having received INVAL
> [Nov 17 15:25:04] DEBUG[5138] chan_iax2.c: Destroying call 2963
> [Nov 17 15:25:04] DEBUG[11242] chan_iax2.c: We're hanging up
> IAX2/ihs_trunk_out-2963 now...
> [Nov 17 15:25:04] VERBOSE[11242] chan_iax2.c:     -- Hungup
> 'IAX2/ihs_trunk_out-2963'
>
>
>
> And more setup details, for those who still have the will to live :-)
>
> Asterisk version: 1.6.2.13
> Internal externsions: everything on SIP - 3 Grandstream GXP-2000, 2
> analog phones on a pci OpenVox card and 2 Linphone softphones
> Trunks: IAX2
> Trunks provider: Gradwell
> Asterisk machine: 800Mhz Intel Pentium, 512MB of RAM
> Internet connection: Tiscali business ADSL
>
> I am happy to post here any config files and logs you might think would
> be relevant.
>
> This is not consistent - and I've managed to have 4 concurrent calls
> which held 30 minutes (before I hung them up) when I tried. So not easy
> to replicate.
>
> Sebastian
>