From: Guyler, Rik (rguyler@shp-dayton.org)
Date: Thu Mar 02 2006 - 17:22:15 GMT-3
Tim, there is even an ASP in my area that actually provides a CallManager,
voicemail and everything else you could want for a telephony setup remotely
over a VPN connection. The only thing local to the customer are the IP
phones and the VPN gateway (firewall). I can't tell you the end user
experience first-hand but after we setup the phones (we were contracted to
do the client side of things) the users told us they were pretty happy with
the setup overall.
I've used softphone over a remote access VPN connection many times when I
would work from home from time to time. We also had a sales person in
Montana that would connect in for 8 hours a day to Ohio and said it was
pretty stable. We had the occasional bumps in jitter or delay but overall
the quality was quite good.
Rik
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Tim
Sent: Thursday, March 02, 2006 2:47 PM
To: 'Venkatesh Palani'
Cc: ccielab@groupstudy.com
Subject: RE: voip over VPN
Thanks guys for the feedback and recommendations. I thought it should work
but never tried it and didn't know for sure.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Venkatesh Palani
Sent: Thursday, March 02, 2006 1:14 PM
To: Tim
Cc: ccielab@groupstudy.com
Subject: Re: voip over VPN
Hi Tim,
I have worked on one of those designs thatr run IP TEL over IPSEC, for qos
use pre classify I dont think using ISR are a bad choice. I used GRE and
IPSEC and it wasnt that bad. actuallhy I tried them between asia and US and
it was OK, most of the delay come with ur SP changing their peerig or
redirecting their traffic. any way running VOICE over internet using IPSEC
is a cheap solution but it is has numerous external dependencies.
Some of my personal recommandation
1. use a Signle SP for all your site so your traffic is kept within the same
network as for as possible. soem of the Asia SP peer in US which makes the
ASIA -ASIA traffic pretty hard
2.USE pre qulaify
3. try avoiding split tunneling as the internet downlaod could swamp your
voice
4. USe ISR routers
5. use Codec 723 where possible
6. use some sort of monitoring system to monitor delay and latency or/and
use IPSLA to fall back to gateway incase of huge latencies
...
HTH,
Venkatesh
On 3/3/06, Tim <ccie2be@nyc.rr.com> wrote:
>
> Hi guys,
>
>
>
> Does anyone have any experience with running voip over a site-to-site
> IPsec VPN?
>
>
>
> Assuming the voice traffic is prioritized as it ought to be and the
> connection to the wan cloud is big enough, does the VPN processing
> slow down the voip traffic to the point where people used to toll
> quality voice would consider it un-acceptable?
>
>
>
> I'd appreciate all your thoughts and comments.
>
>
>
> TIA, Tim
>
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