[asterisk-users] Sonicwall potentially causing long ping times to SIP phones

[Bruce Komito]

We've had LOTS of problems with Sonicwalls doing bad things to SIP and RTP
connections.  I've seen the delay thing, as well as the Sonicwall throwing
away entries from the ARP table because of inactivity.  I've also seen
sporadic, intermittent problems with transfer from one phone to another.
I have no doubt that a new, properly configured Sonicwall can be made to
function properly in a VoIP environment, but we are not Sonicwall experts,
nor are many of the purported experts.  In every case where we've had
problems with VoIP behind a Sonicwall, the problems ALL disappear when we
put the phones on a LAN segment that does not pass through the Sonicwall.
So, now that's our going in position.  If it works, great, but if it
doesn't, our solution is to take the Sonicwall out of the picture.

My $.02 .

Bruce Komito
WPTI Telecom
(775) 236-5815


On Thu, 23 Oct 2008, Bill Michaelson wrote:

> Sorry for asking the obvious question, but are there other elements of
> the slow path besides the Sonicwall? I mean, what is "in front" of the
> Sonicwall? Also, might the Sonicwall be positioned as some kind of choke
> point in the topology, thus leading to genuine sporadic congestion?
>
> James Lamanna wrote:
>
> > Date: Wed, 22 Oct 2008 11:35:12 -0700
> > From: "James Lamanna" <jlamanna at gmail.com>
> > Subject: [asterisk-users] Sonicwall potentially causing long ping
> > 	times to	SIP phones
> > Hi,
> > I'm having an issue where some phones behind a sonicwall are auto-congesting.
> > The status on "sip show peer" shows ping times anywhere from 80ms all
> > the way up to 1100ms.
> > PCs behind the same firewall have a ping time of about 30ms to the PBX itself.
> >
> > Does anyone know if the sonicwall is inserting delay into the SIP
> > signaling path and lagging the OPTIONS messages for qualify?
> >
> > Thanks.
> >
> > -- James
> >
> >
> >
>
>