[Asterisk-Users] SNOM 200 and Asterisk Woes

[Dan Mahoney, System Admin]

On Wed, 11 Aug 2004, Olle E. Johansson wrote:

> Dan Mahoney, System Admin wrote:
>
>> You start up the phones, they register, all is good.  They show up in sip 
>> show peers like thus:
>> 
>> danm/danm        65.125.237.91    D   N      255.255.255.255  5060     OK 
>> (29 ms)
>> 
>> We pass a few calls in and out, and asterisk "deadlocks" (not a true 
>> deadlock, see below).  The sip show peers list becomes frozen.  One of two 
>> things will happen:
> Please explain what you mean with "becomes frozen".

Inbound SIP calls don't connect.  Asterisk's console responds, but hangs 
up on a "stop now" and never exits cleanly except with -9.  Peers are held 
in a constant state of whatever-state-they-were-in (ip addresses, etc). 
Outbound calling has a 50/50 shot of working.  If the phones were 
registered when this happens, they continue to be able to make outbound 
calls.  If registration has failed as a result of this happening, they are 
unable to re-register.

>> 1) I can power down the phone and it will still show status OKAY.
>
> The OK in sip show peers is the result of the qualify= tests. We're sending
> a SIP packet to the phone and gets a response. It happens with some 
> frequency,
> so Asterisk will not immediately see that the phone is off line. Turn on SIP
> debug and wait for the next OPTIONS sent to the phone, you will propably see
> a couple of retransmits before it becomes not OK.

I've waited an hour with the snom phone unplugged.  This isn't "normal" 
behavior.

>> 2) Or, the other thing I'm seeing is that the phones will forget to 
>> re-register.  As in, they show up in sip show peers as status UNKNOWN, but 
>> under this non-deadlock'ed deadlock, they can still make outbound calls 
>> fine.
> Status UNKNOWN has nothing to do with registration. If the phone hasn't
> registred, you will not see an IP address to the phone in 'sip show peers'.
> Status UNKNOWN indicates that our SIP "pings" is not answered.
>
> Do you have NAT between your phone and Asterisk? Seems so since you turn
> on qualify.

I turn on qualify even for phones on the local subnet, for exactly this 
reason.  However, yes, some of these phones were behind nat.  But not all 
of them.  In fact the one I pasting above was on the same local subnet. 
No firewalls.  (as stated previously).

-Dan Mahoney


--

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--Cali and Gushi, 6/23/02


--------Dan Mahoney--------
Techie,  Sysadmin,  WebGeek
Gushi on efnet/undernet IRC
ICQ: 13735144   AIM: LarpGM
Site:  http://www.gushi.org
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