Introduction of GRE VPN of S switches

Introduction to GRE of S series switches excluding the S1700:
Generic Routing Encapsulation (GRE) encapsulates packets of some network-layer protocols, such as Internetwork Packet Exchange (IPX), IPv6, and AppleTalk, so that the encapsulated packets can be transmitted over networks of a different network-layer protocol, such as the IPv4 network.
As a Layer 3 tunneling technology, GRE encapsulates packets of a protocol into packets of another protocol to transparently transmit packets over GRE tunnels. This technology enables packet transmission on heterogeneous networks.
GRE is easy to implement, imposing low burden on devices on both ends of a tunnel.
GRE tunnels can connect networks running various network protocols over the IPv4 network, using the original network architecture and reducing costs.
GRE extends the operation scope of network protocols with limited hop counts, allowing for flexible enterprise networking.
GRE connects discontinuous subnets and sets up VPNs, implementing secure connections between the enterprise headquarters and branches.

Scroll to top