Cabletron Systems switches, bridges manual Fault Aversion, Code Code Definition Meaning

Network Design

Use a standard, decipherable labeling code for cable and hardware. A label reading L2N5W2C1S243 may look like gibberish now, but if you know that the letter codes indicate locations or conditions of installation, it can be quite helpful. Table 5-1,below, shows the meanings of the codes and numbers of this example.

Cable Label: L2N5W2C1S243

Table 5-1. Cable Code Key

Code	Code Definition	Meaning
L2	Location 2	Engineering Building
N5	Network 5	Network Map #5
W2	Workgroup 2	Production Controls Workgroup
C1	Closet 1	Wiring Closet #1
S243	Station 243	Wallplate #243

NOTE

The code key depicted above is only an example, and is not indicative of any industry standard or generally accepted cable marking practices.

Fault Aversion

A good network design strategy realizes the importance of avoiding future trouble spots. It is possible to design a network such that the most dangerous of these trouble spots are either eliminated, covered by contingencies, or their effects are minimized. This aspect of network design is called “fault aversion.”

A fault averse network uses the capabilities of available hardware and the fault-tolerance or recovery features of the technologies of the network to provide for three things: the elimination of single points of failure, the availability of redundancy, and the quick and easy isolation of and recovery from errors or problems.

5-12 Creating a Manageable Plan