CCNA 4.3: Configure, verify and troubleshoot GRE tunnel connectivity (FREE LAB!)
Overview Generic routing encapsulation (GRE) is a simple site-to-site VPN tunneling protocol. Study Notes: Nonsecure, site-to-site VPN tunneling protocol Used to tunnel IP packets across the internet GRE header encapsulates an IP header and packet The IP header and packet is the letter The GRE header is the envelope GRE can encapsulate any OSI […]