As a CCNA, you’ll need to understand the basics of the Frame Relay technology and be able to configure it in simple scenarios. First, understand that Frame Relay is a packet-switched technology. From everything you’ve learned so far, just telling you this should make you immediately realize several things about it:
You won’t be using the encapsulation hdlc or encapsulation ppp command to configure it.
Frame Relay doesn’t work like a point-to-point leased line (although it can be made to look and act like one).
Frame Relay is usually less expensive than leased lines are, but there are some sacrifices to make to get that savings.
So, why would you even consider using Frame Relay? Take a look at Figure 1 to get an idea of what a network looked like before Frame Relay. Now check out Figure 2. You can see that there’s now only one connection between the Corporate router and the Frame Relay switch. That saves some major cash!
If, for example, you had to add seven remote sites to the corporate office and had only one free serial port on your router—it’s Frame Relay to the rescue! Of course, I should probably mention that you now also have one single point of failure, which is not so good. But Frame Relay is used to save money, not to make a network more resilient.
Figure 1: Before Frame Relay
Figure 2: After Frame Relay
You won’t be using the encapsulation hdlc or encapsulation ppp command to configure it.
Frame Relay doesn’t work like a point-to-point leased line (although it can be made to look and act like one).
Frame Relay is usually less expensive than leased lines are, but there are some sacrifices to make to get that savings.
So, why would you even consider using Frame Relay? Take a look at Figure 1 to get an idea of what a network looked like before Frame Relay. Now check out Figure 2. You can see that there’s now only one connection between the Corporate router and the Frame Relay switch. That saves some major cash!
If, for example, you had to add seven remote sites to the corporate office and had only one free serial port on your router—it’s Frame Relay to the rescue! Of course, I should probably mention that you now also have one single point of failure, which is not so good. But Frame Relay is used to save money, not to make a network more resilient.
Figure 1: Before Frame Relay
Figure 2: After Frame Relay
Frame Relay creates a cost-effective mesh network.
No comments:
Post a Comment