Which Cable to Use?


Table 4-2 describes which cable should be used when wiring your devices together. It is important to ensure you have proper cabling; otherwise, you might be giving yourself problems before you even get started.

Table 4-2. Determining Which Cables to Use When Wiring Devices Together

If device A has a:

And device B has a:

Then use this cable:

Computer COM port

Console of router/switch

Rollover

Computer NIC

Switch/hub

Straight-through

Computer NIC

Computer NIC

Crossover

Switch or hub port

Router's Ethernet port

Straight-through

Switch or hub port

Switch or hub port

Crossover (check for uplink button or toggle switch to defeat this)

Router's Ethernet port

Router's Ethernet port

Crossover

Computer NIC

Router's Ethernet port

Crossover

Router's serial port

Router's serial port

Cisco serial DCE/DTE cables


Table 4-3 lists the pinouts for straight-through, crossover, and rollover cables.

Table 4-3. Pinouts for Different Cables

Straight-Through Cable

Crossover Cable

Rollover Cable

Pin 1 Pin 1

Pin 1 Pin 3

Pin 1 Pin 8

Pin 2 Pin 2

Pin 2 Pin 6

Pin 2 Pin 7

Pin 3 Pin 3

Pin 3 Pin 1

Pin 3 Pin 6

Pin 4 Pin 4

Pin 4 Pin 4

Pin 4 Pin 5

Pin 5 Pin 5

Pin 5 Pin 5

Pin 5 Pin 4

Pin 6 Pin 6

Pin 6 Pin 2

Pin 6 Pin 3

Pin 7 Pin 7

Pin 7 Pin 7

Pin 7 Pin 2

Pin 8 Pin 8

Pin 8 Pin 8

Pin 8 Pin 1





CCNA Self-Study(c) CCNA Portable Command Guide
CCNA Portable Command Guide
ISBN: 1587201585
EAN: 2147483647
Year: 2006
Pages: 261
Authors: Scott Empson

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