[asterisk-users] Grandstream GXP2000 Loses Connectivity

[Peder @ NetworkOblivion]

I hate to reply to my own message, but I have some more info from 
debugging.  A Grandstream tries to register and uses a nonce and it is 
accepted by *.  The next time it tries to register, it uses the same 
none and * says "SIP/2.0 401 Unauthorized".  The Grandtream says "ok, 
here try this new nonce" and then it works again.  Again, the next time 
it registers, it tries the old one and gets slapped again and gives a 
new one.  After some indeterminate amount of time, the Grandstream 
actually tries to use the same nonce 3 times in a row.  Once it works, 
the next time it gets a "SIP/2.0 401 Unauthorized" and then the third 
time, it gets a "SIP/2.0 403 Forbidden".  This evidently causes the 
Grandstream to completely give up registration as once * sends this, the 
Grandstream nevers tries to register again.  I've waited for 1-2 hours 
and it never tries again.  The "Forbidden" response appears to kill 
registration until the Grandstream is rebooted.  Has anybody else seen 
this?  Or maybe know how to get around it?



Peder @ NetworkOblivion wrote:
> I did post most of that.  Point to point T1, no firewalls and no nat, 
> cisco routers, bandwidth is monitored at 30 second intervals and never 
> exceeds 50%, almost always 25% or less.  The key is that I get messages 
> from * like "failed to register" and it is from the IP of the phone, so 
> it is like the phone is sending some messed up message.  Asterisk is 
> old, 1.0.3, but it has been stable for 2-3 years with zero issues. 
> While it could be a asterisk version issue, I have 100-150 phones on it, 
> mostly Cisco 7940/7960 and none of them have these issues.  The only 
> phones with issues appear to be Grandstream and they are all running 
> 1.1.5.15.  Here is a sample sip config:
> 
> [7834-1]
> context=HASKI-LD
> type=friend
> callerid="HASKI" <7834>
> username=7834-1
> secret=47834-1
> host=dynamic
> mailbox=7834 at HASKI-VM
> canreinvite=no
> qualify=yes
> 
> Here is one of the log messages:
> 
> Feb 11 18:18:05 NOTICE[20905]: Registration from 
> '<sip:7834-1 at 192.168.1.10>' failed for '192.168.2.165'
> 
> That message is from a phone that is set to register every 5 minutes. 
> It's been 50 minutes and it still hasn't re-registered.  If I reboot the 
> phone, it will register right away...
> 
> Any ideas?
> 
> 
> Peder
> 
> 
> Andrew Joakimsen wrote:
>> Yes but network issues are still possible. What sort of network
>> connections are you using?  What sort of routers/firewalls/other
>> network gear? Are you certain of the reliability of the T1? Also you
>> did not post what Asterisk version is in use. Please also post the
>> relevant sip.conf and configuration file of the phone.
>>
>>
>> On Feb 11, 2008 4:52 PM, Peder @ NetworkOblivion
>> <peder at networkoblivion.com> wrote:
>>> I have 20-30 GXP2000's connected to * over a T1 line.  Neither end is
>>> NAT'd and there is plenty of bandwidth available over the line.  The
>>> GXP's are 1.1.5.15, which is the latest.  I have a problem where the
>>> phones keep dropping off of * and I get a "failed to register" message
>>> in the log of *.  Sometimes they eventually connect and sometimes, I
>>> have to reboot them to get them to reconnect (I never change the config
>>> though).  Has anybody seen this?  I've tried lowering the Register
>>> Expiration and that seems to make it worse.  If I lower it to 1 minute
>>> or 5 minutes, I lose them every 10-15 minutes.  If I put it at 10
>>> minutes, it loses connectivity once or twice a day.  I tried Grandstream
>>> support and their answer was completely useless.  Has anybody seen this?
>>>   Or does anybody have any ideas?  Again, no NAT involved, so don't say
>>> STUN or NAT issue.
>>>
>>> Peder
>>>
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