From: Venkatesh Palani (kvpalani@gmail.com)
Date: Thu Mar 02 2006 - 15:14:01 GMT-3
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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