So, as per cisco's configuration guide: The GDOI protocol is protected by an ISAKMP Phase 1 exchange. The GDOI key server and the GDOI groupmember must have the same ISAKMP policy. This Phase 1 ISAKMP policy should be strong enough toprotect the GDOI...

Can anyone help me with those different fields in NHRP especially some of them doesn't make sense to me atleast yet. The only few important one regarding DMVPN are the Fixed Header, Mandatory, Responder Address which I got to know and in those also t...

So, I was just going through cisco's documentation on STP PVID and Type Inconsistencies: (https://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24063-pvid-inconsistency-24063.html)That doc specifies: If the Native VLAN on an...

I don't understand the working of DMVPN especially in phase 2 and phase 3. When talking about NHRP Resolution request from one spoke to another spoke through the hub, like why do even need that request to go to all the way through hub. Isn't it good ...