[asterisk-users] VPN As SIP Tunneling?

[Andrew Joakimsen]

So in your example you can manage QoS within the VPN but have no control
whatsoever over the VPN tunnel as a hole, it would be the same result as if
you just passed straigth TCP over your connection with QoS, however  you
will waste more resourses for the VPN and probably introduce a bit of
latency, small but latency none-the-less.

On 12/11/06, Barry Fawthrop <barry at ttienterprises.org> wrote:
>
> Hi All
>
> Could a VPN be used to help with SIP Tunneling and QoS issues.
>
> State 1:
> Two IP Networks Connected via the Public Internet transmitting VoIP
> Traffic
> Say a VoIP User and VoIP Termination Provider.
> Each side can put QoS onto their part, but if QoS does NOT exist between
> them
> then call quality will be bad anyhow.
>
> State 2:
> Same as above except a VPN tunnel is setup between each side.
> Thus making them appear on the same network and possibly same subnet.
>
> (1) Would this now traceroute a one hop ?
> (2) Would this have a lower or higher ping time, thus latency ?
> (3) With the additional Encryption etc.. if using a 1 Mbps Internet
> connection
>     What would the "actual" amount available now be 700kbps, in other
> words
>     How much overhead is there with a VPN tunnel that would reduce the
> available bandwidth ?
>
>
> Thanks to all
>
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