My understanding is that - IPSEC doesnt support multicast, or routing protocols by virtue of not interface/multicasting. So if you are interconnecting two sites over a network not within your control you primary want to use GRE.
IPSEC provides an encrypted tunnel, good for Lan2Lan and User Dial ins, but no dynamic routing/multicasting over it. And GRE over ipsec is simply if you want to encrypt your GRE tunnelled traffic. B On Mon, Aug 27, 2012 at 4:14 PM, waheed Ahmed <[email protected]>wrote: > Dear Team , > > > I have some little confusion that when i need to use these tunnel or in > which scenario. If some one has pictorial explanation then please send it > to me. > > > > 1. GRE Tunnel > 2. IPSec Tunnel > 3. GRE Tunnel over IPSec Tunnel > > > > With Regards > Waheed Ahmed > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
