[55929] in North American Network Operators' Group

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RE: VoIP over IPsec

daemon@ATHENA.MIT.EDU (Charles Youse)
Mon Feb 17 18:24:56 2003

Date: Mon, 17 Feb 2003 18:22:53 -0500
From: "Charles  Youse" <cyouse@register.com>
To: "Iljitsch van Beijnum" <iljitsch@muada.com>
Cc: <nanog@nanog.org>
Errors-To: owner-nanog-outgoing@merit.edu


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.

C.

-----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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