Generic Routing Encapsulation. An optional form of tunneling that can be supported by home agents, foreign agents, and mobile nodes. GRE enables a packet of any network-layer protocol to be encapsulated within a delivery packet of any other (or the same) network-layer protocol.

eneric outing ncapsulation - RFC 2784. A protocol providing data encapsulation to allow tunneling.

Tunneling protocol developed by Cisco Systems that can encapsulate a wide variety of protocol packet types inside IP tunnels, creating a virtual point-to-point link to Cisco routers at remote points over an IP internetwork. By connecting multiprotocol subnetworks in a single-protocol backbone environment, IP tunneling using GRE allows network expansion across a single-protocol backbone environment.

Generic Routing Encapsulation as described in RFC 1701 and 1702 (GRE over IPv4 network ftp://ftp.rfc-editor.org/in-notes/rfc1701.txt ftp://ftp.rfc-editor.org/in-notes/rfc1702.txt

A tunneling protocol designed to encapsulate arbitrary network layer packets inside other arbitrary network layer packets e.g. IP inside of IP. Does not provide encryption for encapsulated packets.

Generic routing encapsulation. A generic encapsulation procedure, defined in RFC 1701, that was developed prior to the development of Mobile IP.

Generic routing encapsulation. A tunneling protocol that encapsulates a variety of IP packets to enable data transmission through an IP tunnel. GRE is used to create a virtual point-to-point link to routers at remote points in a network. See also tunneling protocol.