VPN

FlexVPN is what happens when Cisco stops bolting features onto crypto maps and rebuilds the whole thing on top of

IKEv2 is not IKEv1 with a bigger version number. It is a different protocol, defined in a different RFC, with

You have a site-to-site VPN in production. It works. It has worked for years. It uses a crypto

If you are building a brand new site-to-site tunnel in 2026, this is the one you should build:

Sooner or later someone hands you two routers, two sites, and "encrypt the traffic between them." On Cisco

If you are still building site-to-site VPNs with crypto maps in 2026, you are configuring a router the