Cat 5e networking cable purchasing estimate

Tags:
CAT-5E cables
Data Center
Data Center administration
Data center network cabling
data center networking
I have been asked to purchase a supply of CAT-5e network cables for use in our data center racks.  I am having trouble estimating how many of each length we will need.  Is there a rule of thumb for making this type of estimate, say, for a fully populated and properly configured standard rack?



Software/Hardware used:
CAT-5e cabling

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Why worry about multiple lengths of cable.

1. Why have short lengths that might sit on the shelf for ages, while longer ones are contantly being used and replaced?

2. Cable sitting on the shelf and not being used for whatever reason, is not something finace want to know about. That cost or ‘dead stock’ is part of the IT budget that could be used elsewhere to better effect.

3. Cat 6 cabling is becoming more prevalent and it supports a higher data transfer rate.

My suggestion is to get 3 percent of the number of cables being used now, and buy them as Cat 6 in the longest length used in the racks. ( 2 per cent can be quite a lot of cables.)

We have 4 fully utilised 28 port switches in each of 7 racks. not including routers and othere quipment using the ethernet cables (Servers, pc’s used to monitor band width usage etc) so we have 4 replacement cables per rack (times 7 racks = 28 cables) which coincidentally is enough to populate another 28 port switch if we wanted to buy it in in a hurry.

Less cables are held and they can be used/re-used anywhere in the rack, and it is simpler to order replacements without having to look up all the item numbers for each size. One size fits all. Plus upgrading of equipment is figured into stock. (Don’t forget to include essential labelling tags in this purchase.)

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