From: Scott Morris (swm@emanon.com)
Date: Mon Aug 23 2004 - 18:43:29 GMT-3
Because IPSec doesn't carry multicasts or broadcasts... So otherwise,
dynamic routing may not happen. So you use GRE for that portion, and once
inside the GRE tunnel, GRE packets are seen as unicast destined for the
pther end.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIP, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Casey Paul (IE)
Sent: Monday, August 23, 2004 5:22 PM
To: ccielab@groupstudy.com
Subject: Ipsec/ gre
Hi
Can someone explain to me why I need to use gre when using ipsec..
why cant ipsec be used instead of gre..??
Thanks
/Paul
Paul Casey
Core Networks
Technology
O2 (IRL)
Phone: +353 1 6096822
Fax: +353 86 5 8143310
Mobile: +353 86 8143310
www.O2.com
Email: paul.casey@o2.com
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