How to Configure GRE Tunnel in Cisco

GRE means Generic Routing Encapsulation. GRE is a Cisco proprietary standard for encapsulating layer 3 packets over an IP network.GRE tunnel Create  a Virtual Point to Point Connection. GRE Protocol offer many Advantage like-use Multiple Protocol in single Backbone,Being less resource demanding than its alternatives (e.g. IPsec VPN) Please note that GRE does not encrypt the tunnel but encapsulates it with a GRE header. if data protection require need to configure IPSEC. in this Topology we Configure GRE Tunnel.   R1 Router Initial Configure R1#conf t Enter configuration commands, one…

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