From: Michael Breen (mbreen@xxxxxxxxx)
Date: Mon Jun 03 2002 - 14:25:41 GMT-3
IPSec is a encrypted tunnel that protects packets.
GRE is an unencrypted tunnel that passes Multicast traffic.
An IPSec protected GRE tunnel is an encrypted tunnel that protects Multicast
packets.
--MB
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Tom
Young
Sent: Monday, June 03, 2002 9:24 AM
To: elping
Cc: ccielab@groupstudy.com
Subject: Re: IPSec&GRE
Thanks for your reply, would you teach me further, when
could I use IPSec, when could I use GRE and when could I
use the combine of IPSec&GRE?
Thanks
Young
--- elping <elping@acedsl.com> $B$+$i$N%a%C%;!<%8!'(B
> you will notice it is a tunnel if you do a trace
> across ipsec
> it will be one hop
>
>
-----r1(ipsec)-------r2-------r3--------r4-------(ipsec)r5
> if you trace from r1 to r5 it will show one hop
>
> Tom Young wrote:
>
> > A question about the IPSec and GRE, I want to know
> when I
> > use the GRE combine with IPSec, When I only use
> IPSec is
> > ok. Does IPSec has the function of making a
> tunnel?
> >
> > Thanks
> >
> > Young
> >
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