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nikolas.e

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Reply with quote  #1 
I guess this depends on the Workstation NIC maximum speed and also the distance limitations correct?

Backbone structure(Servers) with 10 Gigabit switches -> CAT6
If clients have a 10gigabit NIC? CAT5E or CAT6?

If i want to use CAT6 for the workstations and the distance  between the  Workstations and the Backbone Switches  is much bigger than the CAT6 distance limit, could i connect another 10 gigabit switch in between them and have the same performance and also fix the distance issue with this type of cable?


Am asking for opinions

Thanks

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cj_berlin

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Reply with quote  #2 
Hi,

in the core, you should stick with fiber. Same holds in regard to the connections between core and access. On the access layer, however, you have to see that you don't exceed 30m wire length when using CAT6 or 22m when using CAT5E. When in doubt, put in another access switch.

What applications require 10G to the workstation?

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nikolas.e

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Reply with quote  #3 
One App. Auto-cad for around 100 users.And some other apps less heavy of course. This question is for a future structure which i do not know what hardware will include.And of course it depends on the prices and lot of other factors.Heck i dont even know if i am the guy to build it. Just saying now [smile]. Anyway wouldn't it better if budget allows it to use only cat6 cabling structure and all hardware(Workstations,Servers,Switches) to run on 10Gigabit speeds instead of gigabit speed? If of course distance allows it or use switches in between to cover up the distance.

You mentioned about : "22m when using CAT5E". CAT5E distance limit is 100 meters. You mean that after the 22m it stars to lose bandwidth speed?

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cj_berlin

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Reply with quote  #4 
Quote:
Originally Posted by nikolas.e
CAT5E distance limit is 100 meters.


For up to Gigabit, it is. For 10G, there is no official specification AFAIR but 22m is what hardware vendors will be willing to support.

And no, you won't just lose bandwidth but you'll start getting all sorts of packet loss, jitter and whatnot.

If there indeed is a justifiable business case for 10G all the way to the desktop, there must be money in the business to put in fiber to the desktop as well. Personally, I wouldn't even try running 10G over copper if it's more than a rack or two away. But maybe it's just me.

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Phil-n-JaxFL

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Reply with quote  #5 
cj is correct. When I worked at Lucent, we did extensive testing.
Plus, when you put whatever into your building, it tends to stay there 10 or more years.
If you have the business case for 10g then go with fiber.
Because, in 10 years, I believe everyone will be there or moving there.

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nikolas.e

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Reply with quote  #6 
Thanks for your info. It seems i will not be that guy for the new network( i guess i lost the opportunity to build a network as i want it) but learned something new.



Thanks again

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