26 Oct
2005
26 Oct
'05
9:30 p.m.
Hello Zen,
We sell GS in the Netherlands on our website www.voipwereld.nl and
therefore we tested DNS SRV on a number of different GS models. DNS SRV
works with Grandstream HT 488/496 boxes perfectly. These boxes
automatically detect if one SIP server is down and move over to the next
one.
DNS SRV is also implemented in GXP-2000 but appears to do a DNS query
once at start up instead of before every call.
This is not perfect and should be done before every call or REGISTER
without need for a reset. This will be fixed next firmware release of
the GXP-2000 according to GS.
Best regards
Paul van Schagen
-----Oorspronkelijk bericht-----
Van: users-bounces(a)openser.org [mailto:users-bounces@openser.org] Namens
Zen Kato
Verzonden: woensdag 26 oktober 2005 13:45
Aan: helge(a)smartnet.no
CC: users(a)openser.org
Onderwerp: Re: [Users] SIP clients and DNS SRV
Hi,
I posted on [serusers] regarding DNS SRV,t_replicate,backup server and
GS phones.
My test resut of BT101(1.0.7.11-newest) and GXP2000(1.0.1.9) was
no good.
My question is eventhough we set up DNS SRV on server side, if sip
clients does not suppot DNS SRV, do we have a risk of (5+5)minutes
out of service time when we set up 5 minutes REGISTER intervals?
If UA have multiple REGISTERs outgoing lines such as GXP2000,
we could set up Line1 for sip1&sip2(DNS SRV) Line2 for sip3 server.
In this case if line1 does not work, the user can use Line2.
Xlite can register 3 sip servers, but only default sip proxy can
use as outgoing line, so the Xlite users have (5+5)minutes out of
service risk.
Does Cisco 7960 work perfectly on DNS SRV?
Regards,
Zen
Helge Waastad wrote :
--
mvh/best regards
Helge Waastad
System Engineer
Smartnet
(+47)67830017
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Hi,
I've started to add some more information to voip-info.
I'm still waiting for response from Grandstream and others on their
support (or future support) for DNS SRV.
br hw
On Wed, 2005-10-19 at 17:32 +0200, Klaus Darilion wrote:
> Hi Helge!
>
> According to my tests, also SNOM can do SRV based failover.
>
> I've published my test results at:
> http://www.voip-info.org/wiki/view/SRV+implementations
>
> Please add your test results to this.
>
> regards
> klaus
>
> Helge Waastad wrote:
> > Hi,
> > this is not a technical question regarding OpenSER, but more of
req for
> > information.
> >
> > I'm using Cisco phones and gateways and have implemented DNS SRV
> > redundancy.
> > However, I have never seen a SIP phone that really works with DNS
SRV
redundancy, except from Cisco. (which actually works
as a charm)
Does anyone know other phones that can use dns srv for redundancy?
At least Cisco tries the next DNS SRV entry if it receives a port
unreachable from the highest priority proxy...