From the course: Cisco CCNP ENARSI v1.1 (300-410) Cert Prep: 3 Infrastructure Security
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MPLS Layer 3 VPN
From the course: Cisco CCNP ENARSI v1.1 (300-410) Cert Prep: 3 Infrastructure Security
MPLS Layer 3 VPN
We have a service provider cloud containing two internal routers labeled P1 and P2. And at the edge of this cloud, we, of course, have provider edge routers labeled P1 and P2. These each connect into our customer edge routers. And we have four of those at the edge of our customer clouds. You can see we have two companies with two different locations. We have customer A, site 1, and site 2. And we have customer B with site 1 and site 2. Now the entire reason we use VPNs are that they allow us to emulate point-to-point connections so that we don't require a dedicated link. So this is much more cost effective and scalable. Remember, MPLS uses labels to make forwarding decisions rather than IP information. Within this topology. we have an IGP running between all of our provider routers. Now that could be OSPF, EIGRP, or they could even be static routes. But the goal is to have full connectivity between our entire provider cloud. With MPLS, let's say we look at customer A here who has two…
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