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Unread 02-20-2009, 10:33 PM   #1
martin
 
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Default RFQ: New Voxalot Failover Implemention

We have made some changes to Voxalot to further improve our fail over capabilities. Please read and comment on this fail over strategy. It is important to note that this fail over strategy will ONLY work for you if you configure your device to use SRV lookups. So please do so:

SRV record - Wikipedia, the free encyclopedia

The following is a breakdown of the new UDP SRV setup for Voxalot. The TCP setup is identical.

AU Service

host -t srv _sip._udp.au.voxalot.com

_sip._udp.au.voxalot.com has SRV record 10 100 5060 proxy01.au1.voxalot.com.
_sip._udp.au.voxalot.com has SRV record 20 50 5060 proxy01.us1.voxalot.com.
_sip._udp.au.voxalot.com has SRV record 20 50 5060 proxy02.us1.voxalot.com.
_sip._udp.au.voxalot.com has SRV record 30 100 5060 proxy02.eu1.voxalot.com.

Direct 100% of traffic to proxy01.au1.voxalot.com

1st Failover:

Direct 50% of traffic to proxy01.us1.voxalot.com
Direct 50% of traffic to proxy02.us1.voxalot.com

2nd Failover:

Direct 100% of traffic to proxy02.eu1.voxalot.com


EU Service

host -t srv _sip._udp.eu.voxalot.com

_sip._udp.us.voxalot.com has SRV record 10 60 5060 proxy01.eu1.voxalot.com.
_sip._udp.us.voxalot.com has SRV record 10 40 5060 proxy02.eu1.voxalot.com.
_sip._udp.eu.voxalot.com has SRV record 20 100 5060 proxy02.us1.voxalot.com.
_sip._udp.eu.voxalot.com has SRV record 30 100 5060 proxy01.au1.voxalot.com.

Direct 60% of traffic to proxy01.eu1.voxalot.com
Direct 40% of traffic to proxy02.eu1.voxalot.com

1st Failover:

Direct 100% of traffic to proxy02.us1.voxalot.com

2nd Failover:

Direct 100% of traffic to proxy01.au1.voxalot.com

US Service

host -t srv _sip._udp.us.voxalot.com

_sip._udp.us.voxalot.com has SRV record 10 60 5060 proxy01.us1.voxalot.com.
_sip._udp.us.voxalot.com has SRV record 10 40 5060 proxy02.us1.voxalot.com.
_sip._udp.us.voxalot.com has SRV record 20 100 5060 proxy02.eu1.voxalot.com.
_sip._udp.us.voxalot.com has SRV record 30 100 5060 proxy01.au1.voxalot.com.

Direct 60% of traffic to proxy01.us1.voxalot.com
Direct 40% of traffic to proxy02.us1.voxalot.com

1st Failover:

Direct 100% of traffic to proxy02.eu1.voxalot.com

2nd Failover:

Direct 100% of traffic to proxy01.au1.voxalot.com
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Unread 02-20-2009, 11:53 PM   #2
majo
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Default

Hi,
As far as i understand, this SRV should be supported by client hardware or software. User does not need to change any thing. Luckily my fritz box support this. I have verified SRV under windows & linux, works both.

By the way what will be way to override this failover mechanisem, if by chance any failover server does not work better for any user. May be direct IP address of preffered server or may be there should be seperate DNS without SRV records.
Ok found!!! proxy01.eu1.voxalot.com will always connect to EU server without failover support.

This SRV failover mechanisem will work for WebCallBack, callforwarding & registered servers or not? Or user will need to change preffered cluster in member detail page manually?

More info.
DNS SRV - voip-info.org
SRV implementations - voip-info.org

I have tested eyeBeam 1.1 3007n stamp 17816, tried eu, us & au proxy server but it always connect to AU proxy[Eyebeam Bad client wrt SRV]
Fritzbox connect as expected.

Regards.

majo

Last edited by majo; 02-21-2009 at 01:50 AM.
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Unread 03-04-2009, 07:32 AM   #3
gotalkvoip
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for some un known reason couldn't get failover mechanisem to work for my spa3102, well I've followed instructions provided by another member but still doesn't register well this is what I've down have i missed something?

under LINE 1 tab:
Use DNS SRV:yes
DNS SRV Auto Prefix: yes
Proxy Fallback Intvl: 900
Proxy Redundancy Method:Based on SRV Port

under SIP tab:
Substitute VIA Addr:yes
Send Resp To Src Port: yes
STUN Enable:yes
STUN Test Enable: yes
STUN Server:stun.voxalot.com:3478
EXT IP:
EXT RTP Port Min:
NAT Keep Alive Intvl: 15

for my proxy i use: au.voxalot.com:5060
(for some reason au.voxalot.com doesn't work)

Also do i need to switch NAT on in spa3102 as it never works for me so I haven't touched it

appreciate anyones help
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Unread 03-05-2009, 10:13 AM   #4
ptruman
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Ditto that, it's not working for me either.

I'm using STUN (stun.voxalot.com), I was configured for eu.voxalot.com, "Send Resp To Src Port" is yes, all VIA flags are set to NO and fallback is set to based on SRV port, and NAT is enabled.

No failover for me...

Does anyone have failover working with an SPA3102? (I'm on BIOS 5.1.10(GW))
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Unread 03-10-2009, 01:10 PM   #5
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Is this automatically handled by ATA's? I see nowhere in my device I can set this SRV stuff.

By the way, I use a Zyxel 2602H-63 modem.
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Unread 03-10-2009, 03:20 PM   #6
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Thanks Martin , but iam not an expert what i have to do with my sip ATA to get this feture active and thanks .
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Unread 09-18-2010, 04:05 PM   #7
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Ok, dumb question: I changed my PAP2 settings to use the SRV failover method. But, how do I know that the ATA is indeed going to use SRV for failover?
I can't find any status field that shows this, and I can't think of way to test it.
Any ideas?
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