It's GRE wrapped in IPSec.We do it because IPSec can't transport multicasts, broadcasts, Non-IP traffic. So we wrap it in GRE and then into IPSec.
Why would someone wrap IPSec in GRE. IPSec is already a tunneling protocol? But to your question, I think it is possible to implement IPSec over GRE and I remember someone posting the configuration for it. BTW, VTI based IPSec can transport broadcast and multicast. With regards Kings On Tue, Nov 30, 2010 at 2:10 AM, manish ludhani <[email protected]>wrote: > hi all > > i was reading GRE over IPsec just got confused > > is it possible to have ipsec over gre. > > isnt it always gre rides over IPsec whether we use crypto map or tunnel > protection. > > any1 can please provide insight ( i couldnt to find it in archives) > > regards > manish > > > > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > >
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