Traffic from the public network may require authentication and encryption inside an IPsec tunnel to reach the private network. Inside the 7750 SR, a public service instance (IES or VPRN) connects to the public network, and a private service instance (typically a VPRN) connects to the private network.įor GRE tunnels using PXC ports, the public and private services must be two different services, and the PXC is the connection between the two services. ![]() In Figure: GRE deployment using a PXC port example, the public network is typically an unsecured network, such as public Internet, over which packets belonging to the private network in the diagram cannot be transmitted natively. Figure: GRE deployment using a PXC port example
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