RE: IPSec and GRE

From: Jay Scott (jasscott@xxxxxxxxx)
Date: Thu Jun 14 2001 - 22:37:27 GMT-3

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Andrew,
          You need GRE tunnels within IPSec to support multicast...OSPF/EIGRP/e
tc

Jay

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Andrew G. Mason
Sent: Thursday, June 14, 2001 6:40 PM
To: ccielab@groupstudy.com
Subject: IPSec and GRE

Hi,

I see quite a few posts and recommendations to use GRE tunnels with IPSec.
This confuses me because IPSec performs tunnelling in its default
configuration anyway so I cannot see any reason for tunnelling through a
tunnel?

Can anybody give a good reason to use a GRE tunnel instead of the default
IPSec tunnel mode configuration?

Cheers

Andrew G. Mason
CCIE #7144
**Please read:http://www.groupstudy.com/list/posting.html
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