O'Reilly logo

Network Warrior, 2nd Edition by Gary A. Donahue

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Frame Relay Network Design

Frame Relay links are more flexible than point-to-point links, because multiple links can be terminated at a single interface in a router. This opens up design possibilities allowing connectivity to multiple sites at a significant cost savings over point-to-point circuits.

Figure 23-5 shows three sites networked together with Frame Relay. On the left, Router B and Router C are both connected to Router A, but are not connected to each other. This design is often referred to as a partial mesh or hub and spoke network. In this network, Router B can communicate to Router C only through Router A.

Meshed Frame Relay networks

Figure 23-5. Meshed Frame Relay networks

On the right side of Figure 23-5 is an example of a fully meshed network. The difference here is that all sites are connected to all other sites. Router B can communicate directly with Router C in the fully meshed network.

Meshed networks are not strictly the domain of Frame Relay. As you can see in Figure 23-6, a fully meshed network can easily be created with point-to-point T1s.

Frame Relay versus point-to-point T1 meshed networks

Figure 23-6. Frame Relay versus point-to-point T1 meshed networks

In a Frame Relay network like the one shown on the left side of Figure 23-6, each location needs a router that can support a single T1. Each PVC can be configured as a separate virtual interface ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required