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@openser.org [mailto:users-bounces@openser.org] Namens Zen Kato Verzonden: woensdag 26 oktober 2005 13:45 Aan: helge@smartnet.no CC: users@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 :
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...
-- mvh/best regards Helge Waastad System Engineer Smartnet (+47)67830017
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