ā07-27-2012 05:55 AM - edited ā03-04-2019 05:05 PM
Hi all,
Can anyone clearly explain that what is the difference between L2TP and GRE tunnel?
I am trying to understand where these protocol are used and why we use L2TP instead of GRE in some cases and vice versa.
Thanks
ā07-27-2012 07:42 AM
Hi Murat
GRE is a simple IP packet encapsulation protocol. a GRE tunnel is used when packets need to be sent from one network to another, without being parsed or treated like IP packets by any intervening routers. a GRE tunnel interface comes up as soon as it is configured and it stays up as long as there is a valid tunnel source address or interface which is up.
L2TP is a tunneling protocol (used to support VPNs) that allows multiplexing of multiple PPP sessions between two IP-connected endpoints, and a control protocol for dynamically establishing and maintaining the emulation of these PPP sessions. This is very different than GRE.
Hope it Helps,
Soroush.
ā04-26-2022 08:29 AM
has anyone configured L2TP on cisco 9K nexus
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