WAN Link Installation Plan
So far in this chapter, you have learned some of the details
about leased lines (or WAN links, or leased circuit…choose your favorite term).
The goal is to allow two routers to send and receive data between two sites,
particularly when you do not have the right-of-way or capability to run a cable
yourself. The steps you take to create the leased line are as follows:
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1. |
Contract with the phone company to provide a leased line
between two street addresses, even specifically into a certain floor and closet,
and at a certain speed.
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2. |
Install a router at each site, near where the telco will run
its cable.
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3. |
Install an external CSU/DSU near the routers at each site, if
you didn't buy routers with internal CSU/DSUs.
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4. |
Configure the CSU/DSUs (internal or external) with the
correct speed.
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5. |
After the phone company runs the cables, install the cables
into the CSU/DSU (external) or serial interface of the router (internal CSU/DSU)
at each site. |
Now the routers are ready to send and receive data, at least at
OSI Layer 1. Before the routers can send useful end user traffic, however, they
need to know a few more things relating to OSI Layers 2 and 3, which the next
section covers to round out the chapter.
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