VoIP over IPsec

Mon Feb 17 23:22:53 UTC 2003

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 at muada.com]
Sent: Monday, February 17, 2003 6:19 PM
To: Steve Feldman
Cc: nanog at 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?