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

[James Lamanna]

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?
>

The device in front of the SonicWall is a Cisco Router.
Ping times to the ethernet interface of the router are good (~10ms).
Also, having a user behind the SonicWall ping the PBX results in an
average 20-30ms ping time.
So it seems as though the lag is specific to SIP signaling
(specifically the OPTIONS requests that asterisk qualify sends out).

Unfortunately I can't really ask the client to dump their SonicWall
(which we do not manage).
On the SonicWall, I know it is configured for "Consistent NAT" and
"SIP Transformations" are disabled.

-- James

>On Wed, Oct 22, 2008 at 11:35 AM, James Lamanna <jlamanna at gmail.com> wrote:
>> 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
>>