From the course: Cisco CCNP ENCOR v1.1 (350-401) Cert Prep: 1 Architecture, Virtualization, and Infrastructure

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The need to combine GRE and IPsec tunneling

The need to combine GRE and IPsec tunneling

From the course: Cisco CCNP ENCOR v1.1 (350-401) Cert Prep: 1 Architecture, Virtualization, and Infrastructure

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The need to combine GRE and IPsec tunneling

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Years ago, if we wanted to connect a couple of corporate sites, we probably had to get some sort of a WAN connection, like a leased line, or maybe go into a frame relay or an ATM cloud. But these days we have such high-speed connectivity to the Internet through something like a cable modem, or in my home I've got gig fiber. We've got such easy connectivity in many places in the world to high-speed Internet that we can connect one office location to another office location over the Internet. But the challenge is, we want to do that securely because the Internet is an untrusted network. So we need to come up with some sort of a virtual private network, a VPN that can protect our data as it's flowing between a couple of sites. So let's think about how we can accomplish that. We know that we can use these common broadband technologies and the clients, if we're using a site-to-site VPN like this, they don't have to have special software installed. They don't have to have client software…

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