From: Scott Lane (sclaner@xxxxxxxxxxx)
Date: Mon Jun 03 2002 - 16:00:38 GMT-3
With GRE tunnels you can also pass dynamic routing updates, with IPSEC
tunnels, you cannot.
>From: "Michael Breen" <mbreen@cisco.com>
>Reply-To: "Michael Breen" <mbreen@cisco.com>
>To: "Tom Young" <gitsyoung@yahoo.co.jp>
>CC: <ccielab@groupstudy.com>
>Subject: RE: IPSec&GRE
>Date: Mon, 3 Jun 2002 11:25:41 -0600
>
>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> )gLbZ[WF
> > 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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