[Asterisk-Users] ZyXEL P662HW / SIP / Crashing

[Julio Arruda]

Set Wild guess mode on (I'm not familiar with zyxel).:

asterisk-users wrote:

>Has anyone experiences this please: -
>
>We were running a number of ZyXEL P662HW-61 routers at our sites and all
>traffic was being sent over IP-SEC VPN's between devices.
>
>When we moved to a new architecture, we got rid of the VPN links so that
>the SIP traffic was running directly through the routers.  Each site
>uses Snom 360 devices with the latest firmware (v4).
>
>  
>
This means SIP/call signalling and RTP traffic, I assume. Have you 
pinpointed which traffic is the culprit ?
(maybe with routing for the SIP proxy via one router, and for the media 
gateways end points via another ? or SIP via tunnel, rtp outside ?)

>Ever since we did this, the routers have been crashing at least 5 times
>per day.  They appear to carry out a full cold start each time (as
>though they are having a kernel panic).  The ISP is Nildram in the UK,
>but we have also experienced this a few times with another router in
>France on a France Telecom system.
>
>As soon as we route the SIP traffic via another router, stability
>returns to the network.  Our supplier has been very helpful and we have
>tested every release of the firmware from the last 8 months, but they
>all behave the same once SIP is being transmitted.
>
>The routers are running with their most basic configuration now, but
>this doesn't appear to make any difference.
>  
>
Seems like these boxes can do some level of SIP "ALG", looking/messing 
around with the SIP header.
Can you disable this ? You depend in the SIP ALG to handle NAT or 
something like that ?

>Does this sound familiar to anyone please?  We are out our wits end and
>our supplier has no ideas (and neither do ZyXEL it would appear).
>
>For reference, all traffic is being sent through using G.729, but I
>don't think that this makes any difference.
>  
>
If you identify what is the traffic (RTP or SIP), next step would be to 
identify what is the exact trigger (like, if is SIP, is a memory leak in 
INVITEs passing via the ALG and goes on)