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Understanding LAN bandwidth

By chrisi ·
My company is installing a new network system, and questions have arose in deciding what equipment (switches, routers, firewall, etc.) to buy. Biggest question is how to maximize bandwidth from an application server to about 25 users. Application runs heavy on both server and client. The main app really wants a full 100mb connection to run best.

Network is comprised of 30-40 PCs and Macs, several network printers, 2-4 servers, some file, some application, and a fractional T1 internet connection. Backbone will be composed of Cat5 cabling.

I assert that we need to have gigabit NICs and connections to stackable 10/100/1000 switches to maximize network bandwidth. Current proposal is to use a 10/100 NIC on the server, connected to non-stackable 10/100 switches.

Advise is appreciated!

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Understanding LAN bandwidth

by wroming In reply to Understanding LAN bandwid ...

Naturally giga bit is good but the only ones you want connected to gigabit is the servers and maybe select users such as IT staff. Cisco 4507 is a chasis base switch but is rather pricey. 3500 series stackable is a cheaper solution but you defeantlywant stackable across the board. For the TCP-IP protocol turn all other protocols off especially on the printers, workstations and servers such as netbuei, ipx-spx, appletalk the reason is, is that it is very chatty and uses bandwidth. You want to set your switches to 100 full duplex on the servers and if you would like you can on your workstations but I would leave them at auto level. Also on your servers check the file and share level and set the server to if it is a app or file intense so that the windows can manage the os better as well. Also dont forget your cabling Cat-6 cabling would be best for maxium bandwidth or at least cat 5e cat-5 is not good cabling at all. To close this is the best

--- gigabit to the server full duplex
--- workstations auto for nic and switches connected
--- 3550 Cisco stackable for good reliable 4507 for best
--- Minumum of Cat-5e (Belden or Comscope) recommend cat-6
--- Turn off all unneeded protocols
--- Go to TCP-IP properties and file and sharing to select weather it is a app or file server intense.

Hope this helps if you have any questions just ask
wroming@ci.killeen.tx.us

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Understanding LAN bandwidth

by chrisi In reply to Understanding LAN bandwid ...

Poster rated this answer

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Understanding LAN bandwidth

by NetTek In reply to Understanding LAN bandwid ...

Be aware that only CAT5e (not CAT5) is gibabit ceritified.

Your company, like most, is probably all about dollars. The cost of hardware has come way down. The difference in cost between what you are proposing and the current proposal is minimal.Just do your research and show the math.

Example:
The following solution will give you stackable switches, the clients run at 100mb, and the servers run at 1000mb:
Use 10/100/1000 switches. You can find relatively good, stackable, and inexpensive 24 or 48 port switches (3Com, Linksys) that have 10/100 autosensing ports for clients, and 2-4 1000mb ports for servers.
Use 10/100 or 100 cards for the clients. It makes no sense to put gigabit cards in clients, as they will not be communicatingwith each other, but with the server. It would be a waste to have 20 clients running at 1000mb to funnel into a single server running 1000mb.
Use a gigabit card for the servers. This will give you full 100mb for 10 clients simultaneously.

I think if you price the above solution versus the current solution, there would be little cost difference.

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Understanding LAN bandwidth

by chrisi In reply to Understanding LAN bandwid ...

Thank you both for your responses!

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Understanding LAN bandwidth

by chrisi In reply to Understanding LAN bandwid ...

Point value changed by question poster.

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Understanding LAN bandwidth

by chrisi In reply to Understanding LAN bandwid ...

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