Collision and Framing errors with NIC attached to Cable Mode

I'm seeing Collision and Framing errors with NIC attached to Cable Mode, and all the TARballs or GZips that I download (via NS, or FTP) are bad...CRCs, etc...

eth0  RX packets:110650 errors:4 dropped:0 overruns:0 frame:4
Collisions: 4012

What causes framing errors and collisions?  
 
shanselmanAsked:
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handrichCommented:
Hi Shanselman
here is my answer:
1. If you have Coax RG58 Thinwire
Most popular reasons are bad coaxial cables or t-connectors , take a look at the plugs, the contacts should be golden and not green.
The cable must be RG58 or Thinwire. (RG62 or Video cables may not work propperly)

A Second popular reason are wrong topologies, that means you may have configured a star, spider or mash instead of a bus system with only two ends and terminators on both ends (usualy placed on the T-connectors on both ends)

A third reason are wrong Cablelengths.
All cables in the Bus may not exceede 185 meters (Some NIC vendors say more or less). And you must place the t-connector directly (without a cable) on every NIC. There is also a minimum cable length between two t-connectors im not shure one or two meters.

2. If you are using twisted pair
Here wrong cables (phone/modem Style)  
may cause errors.
For 10BaseT you need CAT3 (or better) cables with at least 2 pairs of twisted telephone style cable, for 100BaseT4 (100BaseT4 is not popular in soho use) you may also use CAT3 (or better) cables with at least 4 pairs of twisted telephone style cable, with 100BaseTx you will need CAT5 (or better) cables with at least 2 pairs of twisted telephone style cable.

You must also have a look at the cables if you use 2 pair of twisted telephone style cable then pin 1 and 2 and pin 3 and 6 are twisted,
if you use 4 pair of twisted telephone style cable then pin 1 and 2 , pin 3 and 6 , pin 4 and 5 , pin 7 and 8 are twisted.
This is important especially for 100 MBit cabeling!

You may not use the cables for any other purpose than Ethernet simultanious.

I hope this should help
Best regards Michael
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