Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

On 11/09/2010 03:20 PM, Gareth Blades wrote:

Jonas Kellens wrote:
   

On 11/09/2010 02:12 PM, Gareth Blades wrote:
 

Jonas Kellens wrote:

   

On 11/08/2010 09:50 PM, Jonas Kellens wrote:

 

Hello,

SIP DNS SRV records are not working.

My Grandstream uses the SRV records to find the first Asterisk server
to register to. This works.

But when I shut down the Asterisk proces on server 1 and I restart my
GXP 2010, the phone does not register to server 2... No mather how
long I wait, there is no registration coming in...

When I start the Asterisk proces again on server 1, then here
registration comes in.


Kind regards,
Jonas.

   

More info :

[jo...@jonas ~]$ host -t srv _SIP._udp.sip10.domain.tld
_SIP._udp.sip10.domain.tld has SRV record 25 10 5060 sip2.domain.tld.
_SIP._udp.sip10.domain.tld has SRV record 5 10 5060 sip1.domain.tld.


 

It sounds like the grandstream phones are not fully compliant with the
SRV standard. They are probably just looking for the lowest priority
entry and hardcoding that to be used all the time internally.

If you restart the phone does it work?
It might try the 25 priority entry if it cannot initially contact the
primary server.

   

The way I test it :

- Grandstream turned off.
- Stop asterisk server1 (/sbin/service asterisk stop)
- Turn on Grandstream (power up)

Conclusion :
Grandstream does not register. No register coming in on server2.

Finally :
- Start Asterisk again on server1 (/sbin/service asterisk start)

Conclusion :
Grandstream registers to server1.

Jonas.

 

Then it looks like the Grandstream phone dont fully support DNS SRV.
maybe a firmware update will fix it.
   


I use firmware version 1.2.4.3 
, 
which is the latest stable.


Has anyone on this list implemented a successful Grandstream with DNS 
SRV support ?!



Kind regards,
Jonas.

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Re: [asterisk-users] SIP DNS SRV

[Gareth Blades]

Jonas Kellens wrote:
> On 11/09/2010 02:12 PM, Gareth Blades wrote:
>> Jonas Kellens wrote:
>>
>>> On 11/08/2010 09:50 PM, Jonas Kellens wrote:
>>>  
 Hello,

 SIP DNS SRV records are not working.

 My Grandstream uses the SRV records to find the first Asterisk server
 to register to. This works.

 But when I shut down the Asterisk proces on server 1 and I restart my
 GXP 2010, the phone does not register to server 2... No mather how
 long I wait, there is no registration coming in...

 When I start the Asterisk proces again on server 1, then here
 registration comes in.


 Kind regards,
 Jonas.

>>> More info :
>>>
>>> [jo...@jonas ~]$ host -t srv _SIP._udp.sip10.domain.tld
>>> _SIP._udp.sip10.domain.tld has SRV record 25 10 5060 sip2.domain.tld.
>>> _SIP._udp.sip10.domain.tld has SRV record 5 10 5060 sip1.domain.tld.
>>>
>>>  
>> It sounds like the grandstream phones are not fully compliant with the
>> SRV standard. They are probably just looking for the lowest priority
>> entry and hardcoding that to be used all the time internally.
>>
>> If you restart the phone does it work?
>> It might try the 25 priority entry if it cannot initially contact the
>> primary server.
>>
> 
> The way I test it :
> 
> - Grandstream turned off.
> - Stop asterisk server1 (/sbin/service asterisk stop)
> - Turn on Grandstream (power up)
> 
> Conclusion :
> Grandstream does not register. No register coming in on server2.
> 
> Finally :
> - Start Asterisk again on server1 (/sbin/service asterisk start)
> 
> Conclusion :
> Grandstream registers to server1.
> 
> Jonas.
> 

Then it looks like the Grandstream phone dont fully support DNS SRV. 
maybe a firmware update will fix it.

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Re: [asterisk-users] SIP DNS SRV

[Gareth Blades]

Jonas Kellens wrote:
> On 11/08/2010 09:50 PM, Jonas Kellens wrote:
>> Hello,
>>
>> SIP DNS SRV records are not working.
>>
>> My Grandstream uses the SRV records to find the first Asterisk server 
>> to register to. This works.
>>
>> But when I shut down the Asterisk proces on server 1 and I restart my 
>> GXP 2010, the phone does not register to server 2... No mather how 
>> long I wait, there is no registration coming in...
>>
>> When I start the Asterisk proces again on server 1, then here 
>> registration comes in.
>>
>>
>> Kind regards,
>> Jonas.
> 
> More info :
> 
> [jo...@jonas ~]$ host -t srv _SIP._udp.sip10.domain.tld
> _SIP._udp.sip10.domain.tld has SRV record 25 10 5060 sip2.domain.tld.
> _SIP._udp.sip10.domain.tld has SRV record 5 10 5060 sip1.domain.tld.
> 

It sounds like the grandstream phones are not fully compliant with the 
SRV standard. They are probably just looking for the lowest priority 
entry and hardcoding that to be used all the time internally.

If you restart the phone does it work?
It might try the 25 priority entry if it cannot initially contact the 
primary server.


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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

On 11/09/2010 02:12 PM, Gareth Blades wrote:
> Jonas Kellens wrote:
>
>> On 11/08/2010 09:50 PM, Jonas Kellens wrote:
>>  
>>> Hello,
>>>
>>> SIP DNS SRV records are not working.
>>>
>>> My Grandstream uses the SRV records to find the first Asterisk server
>>> to register to. This works.
>>>
>>> But when I shut down the Asterisk proces on server 1 and I restart my
>>> GXP 2010, the phone does not register to server 2... No mather how
>>> long I wait, there is no registration coming in...
>>>
>>> When I start the Asterisk proces again on server 1, then here
>>> registration comes in.
>>>
>>>
>>> Kind regards,
>>> Jonas.
>>>
>> More info :
>>
>> [jo...@jonas ~]$ host -t srv _SIP._udp.sip10.domain.tld
>> _SIP._udp.sip10.domain.tld has SRV record 25 10 5060 sip2.domain.tld.
>> _SIP._udp.sip10.domain.tld has SRV record 5 10 5060 sip1.domain.tld.
>>
>>  
> It sounds like the grandstream phones are not fully compliant with the
> SRV standard. They are probably just looking for the lowest priority
> entry and hardcoding that to be used all the time internally.
>
> If you restart the phone does it work?
> It might try the 25 priority entry if it cannot initially contact the
> primary server.
>

The way I test it :

- Grandstream turned off.
- Stop asterisk server1 (/sbin/service asterisk stop)
- Turn on Grandstream (power up)

Conclusion :
Grandstream does not register. No register coming in on server2.

Finally :
- Start Asterisk again on server1 (/sbin/service asterisk start)

Conclusion :
Grandstream registers to server1.

Jonas.

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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

On 11/08/2010 09:50 PM, Jonas Kellens wrote:

Hello,

SIP DNS SRV records are not working.

My Grandstream uses the SRV records to find the first Asterisk server 
to register to. This works.


But when I shut down the Asterisk proces on server 1 and I restart my 
GXP 2010, the phone does not register to server 2... No mather how 
long I wait, there is no registration coming in...


When I start the Asterisk proces again on server 1, then here 
registration comes in.



Kind regards,
Jonas.


More info :

[jo...@jonas ~]$ host -t srv _SIP._udp.sip10.domain.tld
_SIP._udp.sip10.domain.tld has SRV record 25 10 5060 sip2.domain.tld.
_SIP._udp.sip10.domain.tld has SRV record 5 10 5060 sip1.domain.tld.

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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

Hello,

SIP DNS SRV records are not working.

My Grandstream uses the SRV records to find the first Asterisk server to 
register to. This works.


But when I shut down the Asterisk proces on server 1 and I restart my 
GXP 2010, the phone does not register to server 2... No mather how long 
I wait, there is no registration coming in...


When I start the Asterisk proces again on server 1, then here 
registration comes in.



Kind regards,
Jonas.
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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

On 11/01/2010 10:58 AM, Gareth Blades wrote:
> Those SRV records are wrong. You have to specify both servers with
> different priorities against the same hostname. You have sip and sip2
> defines with different SRV records so whichever one you configure on the
> phone thats the only record it will seen.
> You should use something like this and configure the phones to use
> sip.domain.tld. :-
>
> sip2.domain.tld.AYY.YY.YY.YY
> sip1.domain.tld.AXX.XX.XX.XX
>
> _SIP._udp.sip.domain.tld  SRV 0 1 5060 sip1.domain.tld.
> _SIP._udp.sip.domain.tld  SRV 1 1 5060 sip2.domain.tld.

Hello,

I'm having no succes with these SRV records (using Plesk at my hosting 
company).

I have for example A-records :

(name - TTL - Type - Priority - Value)
sip1.domain.tld.600AXX.XX.XX.XX
sip2.domain.tld.600AXX.XX.XX.XX

and then SRV-records :

(name - TTL - Type - Priority - Value)
_SIP._udp.sip10.domain.tld.600SRV5sip1.domain.tld
_SIP._udp.sip10.domain.tld.600SRV25sip2.domain.tld

but this does not work with my Grandstream GXP2010.

I then try this :

(name - TTL - Type - Priority - Value)
sip10._udp.domain.tld.600SRV5sip1.domain.tld
sip10._udp.domain.tld.600SRV25sip2.domain.tld

but this does not work either with my Grandstream GXP2010.


Kind regards,
Jonas.

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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

On 11/01/2010 10:58 AM, Gareth Blades wrote:

Those SRV records are wrong. You have to specify both servers with
different priorities against the same hostname. You have sip and sip2
defines with different SRV records so whichever one you configure on the
phone thats the only record it will seen.
You should use something like this and configure the phones to use
sip.domain.tld. :-

sip2.domain.tld.AYY.YY.YY.YY
sip1.domain.tld.AXX.XX.XX.XX

_SIP._udp.sip.domain.tld  SRV 0 1 5060 sip1.domain.tld.
_SIP._udp.sip.domain.tld  SRV 1 1 5060 sip2.domain.tld.
   


Hello,

can a SRV record and an A record co-exist ?

Can I have both :

sip.domain.tld.AXX.XX.XX.XX
_SIP._udp.sip.domain.tld  SRV 0 1 5060 sip1.domain.tld.
??

Will IP-phones that support DNS SRV take the SRV-record and phones that 
do not support DNS SRV the A-record ?



If I only have :
_SIP._udp.sip.domain.tld  SRV 0 1 5060 sip1.domain.tld.
_SIP._udp.sip.domain.tld  SRV 0 1 5060 sip2.domain.tld.

what will happen with IP-phones that do not support DNS SRV when they 
register to sip.domain.tld ???



Kind regards,
Jonas.
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Re: [asterisk-users] SIP DNS SRV

[Gareth Blades]

Those SRV records are wrong. You have to specify both servers with 
different priorities against the same hostname. You have sip and sip2 
defines with different SRV records so whichever one you configure on the 
phone thats the only record it will seen.
You should use something like this and configure the phones to use 
sip.domain.tld. :-

sip2.domain.tld.AYY.YY.YY.YY
sip1.domain.tld.AXX.XX.XX.XX

_SIP._udp.sip.domain.tld  SRV 0 1 5060 sip1.domain.tld.
_SIP._udp.sip.domain.tld  SRV 1 1 5060 sip2.domain.tld.


Jonas Kellens wrote:
> Hello,
> 
> DNS SRV is not really working: when I stop the Asterisk proces on my 
> production server, then the SIP phone is not registering to my backup 
> SIP server.
> 
> I have the following DNS records :
> 
> sip2.domain.tld.AYY.YY.YY.YY
> sip.domain.tld.AXX.XX.XX.XX
> 
> _SIP._udp.sip2.domain.tld.SRVYY.YY.YY.YY.
> _SIP._udp.sip.domain.tld.SRVXX.XX.XX.XX.
> 
> 
> _udp.sip2.domain.tld has a priority of 25
> _udp.sip.domain.tld has a priority of 5
> 
> 
> Jonas.
> 
> 
> 
> On 10/18/2010 02:03 PM, Gareth Blades wrote:
>> Yes if you set the production server to a higher priority then the 
>> backup then the RFC states that the client should periodically check and 
>> switch back to the primary server is it becomes reachable.
>>
>>
>> Jonas Kellens wrote:
>>   
>>>Hello,
>>>
>>> I know YeaLink for example supports this...
>>>
>>>
>>> Can you tell me for sure that when the production Asterisk server 
>>> becomes reachable again, the registration will go back to the production 
>>> server ??
>>>
>>>
>>> Jonas.
>>>
>>>
>>>
>>> On 10/18/2010 01:11 PM, Gareth Blades wrote:
>>> 
 Yes that is the way it is supposed to work. You do have to rely on the 
 sip devices you are using fully supporting SRV records though.
   


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Re: [asterisk-users] SIP DNS SRV

[Steve Howes]

On 1 Nov 2010, at 09:39, Jonas Kellens wrote:
> DNS SRV is not really working: when I stop the Asterisk proces on my 
> production server, then the SIP phone is not registering to my backup SIP 
> server.
> 
> I have the following DNS records :
> 
> sip2.domain.tld.AYY.YY.YY.YY
> sip.domain.tld.AXX.XX.XX.XX
> 
> _SIP._udp.sip2.domain.tld.SRVYY.YY.YY.YY.
> _SIP._udp.sip.domain.tld.SRVXX.XX.XX.XX.
> 
> 
> _udp.sip2.domain.tld has a priority of 25
> _udp.sip.domain.tld has a priority of 5
> 

You don't understand SRV. You should have then both with the same name.

> _SIP._udp.sip.domain.tld.SRVYY.YY.YY.YY.
> _SIP._udp.sip.domain.tld.SRVXX.XX.XX.XX.

And then point the phone at sip.domain.tld. Otherwise how would it know to use 
the other one? It's a different name.

S


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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

Hello,

DNS SRV is not really working: when I stop the Asterisk proces on my 
production server, then the SIP phone is not registering to my backup 
SIP server.


I have the following DNS records :

sip2.domain.tld.AYY.YY.YY.YY
sip.domain.tld.AXX.XX.XX.XX

_SIP._udp.sip2.domain.tld.SRVYY.YY.YY.YY.
_SIP._udp.sip.domain.tld.SRVXX.XX.XX.XX.


_udp.sip2.domain.tld has a priority of 25
_udp.sip.domain.tld has a priority of 5


Jonas.



On 10/18/2010 02:03 PM, Gareth Blades wrote:

Yes if you set the production server to a higher priority then the
backup then the RFC states that the client should periodically check and
switch back to the primary server is it becomes reachable.


Jonas Kellens wrote:
   

Hello,

I know YeaLink for example supports this...


Can you tell me for sure that when the production Asterisk server
becomes reachable again, the registration will go back to the production
server ??


Jonas.



On 10/18/2010 01:11 PM, Gareth Blades wrote:
 

Yes that is the way it is supposed to work. You do have to rely on the
sip devices you are using fully supporting SRV records though.
   
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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

To be clear: I need to set the SRV record on my DNS-server and not on my 
Asterisk server ?!


Because the people @ YeaLink keep on talking about "Your SIP server 
needs to support this"...



Jonas.


On 10/18/2010 02:03 PM, Gareth Blades wrote:

Yes if you set the production server to a higher priority then the
backup then the RFC states that the client should periodically check and
switch back to the primary server is it becomes reachable.


Jonas Kellens wrote:
   

Hello,

I know YeaLink for example supports this...


Can you tell me for sure that when the production Asterisk server
becomes reachable again, the registration will go back to the production
server ??


Jonas.


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Re: [asterisk-users] SIP DNS SRV

[Philipp von Klitzing]

Hi!

> Do I need a low REGISTER timeout value for this to work ? Something
> like 60seconds, so the IP-phones register every 60 seconds... 

This can also be done without SRV records if you have phones that provide 
a fallback SIP registrar entry - snom for example does, and many other 
vendors do to.

Philipp


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Re: [asterisk-users] SIP DNS SRV

[Gareth Blades]

Yes if you set the production server to a higher priority then the 
backup then the RFC states that the client should periodically check and 
switch back to the primary server is it becomes reachable.


Jonas Kellens wrote:
>Hello,
> 
> I know YeaLink for example supports this...
> 
> 
> Can you tell me for sure that when the production Asterisk server 
> becomes reachable again, the registration will go back to the production 
> server ??
> 
> 
> Jonas.
> 
> 
> 
> On 10/18/2010 01:11 PM, Gareth Blades wrote:
>> Yes that is the way it is supposed to work. You do have to rely on the 
>> sip devices you are using fully supporting SRV records though.
> 


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Re: [asterisk-users] SIP DNS SRV

[Jonas Kellens]

Hello,

I know YeaLink for example supports this...


Can you tell me for sure that when the production Asterisk server 
becomes reachable again, the registration will go back to the production 
server ??



Jonas.



On 10/18/2010 01:11 PM, Gareth Blades wrote:

Yes that is the way it is supposed to work. You do have to rely on the
sip devices you are using fully supporting SRV records though.


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Re: [asterisk-users] SIP DNS SRV

[Gareth Blades]

Yes that is the way it is supposed to work. You do have to rely on the 
sip devices you are using fully supporting SRV records though.

Jonas Kellens wrote:
>Hello list.
> 
> When using SIP DNS SRV to define a production Asterisk server with high 
> priority and a backup Asterisk server with a lower priority on this 
> DNS-server, will this work as follow :
> 
> - production server is reachable, so registration of the IP-phone goes 
> to this server
> - production server is unreachable, so registration goes to the backup 
> Asterisk server
> - production server is reachable again, so registration goes back to the 
> production server
> 
> ??
> 
> Do I need a low REGISTER timeout value for this to work ? Something like 
> 60seconds, so the IP-phones register every 60 seconds...
> 
> 
> 
> Kind regards,
> Jonas.
> 


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Re: [asterisk-users] SIP DNS SRV

[Andrew Latham]

You should plan for 2+ productions systems and use DNS round robin to
load balance.  The SRV records define the service but not the path.


~
Andrew "lathama" Latham
lath...@gmail.com

* Learn more about OSS http://en.wikipedia.org/wiki/Open-source_software
* Learn more about Linux http://en.wikipedia.org/wiki/Linux
* Learn more about Tux http://en.wikipedia.org/wiki/Tux



On Mon, Oct 18, 2010 at 7:59 AM, Jonas Kellens  wrote:
> Hello list.
>
> When using SIP DNS SRV to define a production Asterisk server with high
> priority and a backup Asterisk server with a lower priority on this
> DNS-server, will this work as follow :
>
> - production server is reachable, so registration of the IP-phone goes to
> this server
> - production server is unreachable, so registration goes to the backup
> Asterisk server
> - production server is reachable again, so registration goes back to the
> production server
>
> ??
>
> Do I need a low REGISTER timeout value for this to work ? Something like
> 60seconds, so the IP-phones register every 60 seconds...
>
>
>
> Kind regards,
> Jonas.
>
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> _
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[asterisk-users] SIP DNS SRV

[Jonas Kellens]

Hello list.

When using SIP DNS SRV to define a production Asterisk server with high 
priority and a backup Asterisk server with a lower priority on this 
DNS-server, will this work as follow :


- production server is reachable, so registration of the IP-phone goes 
to this server
- production server is unreachable, so registration goes to the backup 
Asterisk server
- production server is reachable again, so registration goes back to the 
production server


??

Do I need a low REGISTER timeout value for this to work ? Something like 
60seconds, so the IP-phones register every 60 seconds...




Kind regards,
Jonas.
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