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RE: VoIP over IPsec
From: "Charles Youse" <cyouse () register com>
Date: Mon, 17 Feb 2003 18:22:53 -0500

Because you need to use GRE to create a virtual interface on the router and thus enable the use of routing protocols.  
At least, that's the only way I know how to do it.


-----Original Message-----
From: Iljitsch van Beijnum [mailto:iljitsch () muada com]
Sent: Monday, February 17, 2003 6:19 PM
To: Steve Feldman
Cc: nanog () nanog org
Subject: Re: VoIP over IPsec

On Mon, 17 Feb 2003, Steve Feldman wrote:

through the corporate enterprise net, Cisco routers with IPSEC/GRE tunnels
over the public Internet.

Maybe a stupid question... why would you need GRE tunneling while IPsec
has a tunnel mode of its own?

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