ipsec ove gre vs gre vs ipsec

[ansarjavaid54]

Hello guys am studying ipsec over gre or gre over ipsec topic and i am much confused regarding use case.

i know the implementation of VTI, ipsec profile on gre interface or ipsec map on real physicall interface.

But what is difference in ipsec over gre or gre over ipsec. Any usecase from these... VTI,Profile or Map...

[Andrey Avdeev]

Hi,

When you  use GRE over IPSEC - all traffic is encrypted inside ipsec tunnel.

When you use IPSEC over GRE - the only  interesting traffic is encrypted and the GRE traffic flows in clear text.