I will preface this by saying I am a Mechanical Designer, our Electrical Designer is no longer with the company.
I have a situation that involves selecting the entire system for GigEthernet, equipment to equipment. I have no knowledge about switches, routers or the like. I am looking for help as to what parameters are needed in order to select the proper equipment.
Three story school building
50um backbone cable
Cat5e to the Work Areas
Need 10/100 to the desktops
Need T1 connection to incoming applications
There will be no fiber run longer than 500m
There will be no UTP run longer than 90m
Any and all help will be greatly appreciated. Thanks in advance.
Some of the questions that must be answered, in order to narrow the switching and routing equipment choices down to what's best for your situation:
>>>Three story school building
* How many wiring closets/distribution frames per floor?
* What kind of electrical power, space, and cooling/ventilation is available per closet?
* Is there one wiring closet/distribution frame that seems ideally suited to being the main one?
* Where is the telecommunications demarcation point (demarc) for the building?
* Is there a designated server room, with adequate space, climate control, and physical security (e.g. restricted access, with cipher lock or electronic card key access control)?
* Will the servers need Gigabit Ethernet connections? Over copper (Cat5 or greater) or fiber cable? How many?
* Will this be a data-only network, or will there be voice and/or video traffic running over it as well? (Determines whether you need uninterruptible power supplies, and how much capacity and run-time? Also influences some equipment choices, with respect to redundant components.)
>>>50um backbone cable
>>>There will be no fiber run longer than 500m
* Is this pre-existing 50/125-micron multimode fiber, or new installation? (Existing multimode is generally good to 220-275m using less expensive Gigabit SX optics; this distance can be extended to 550m using more expensive Gigabit LX/LH optics and mode conditioning launch/patch cables. Newer multimode may be able to take Gigabit even further, using only SX optics.)
* How many strands terminate in each wiring closet? And where do they go to?
* What kinds of connectors are used on the ends of the fiber? (ST, SC, LC, or MT-RJ are the most common).
>>>Cat5e to the Work Areas
>>>Need 10/100 to the desktops
>>>There will be no UTP run longer than 90m
* Does the Cat5e cable run back to the nearest wiring closet/distribution frame on the same floor?
* How many runs/drops total from the desktop locations back to each closet/frame? How many do you expect to be actively used, per closet/frame? (This determines 10/100 switch port count requirements.)
>>>Need T1 connection to incoming applications
* Is this the Internet connection, or a private leased line/wide area network link?
* Would a higher speed than 1.5 megabits per second be needed?
Router is the connecting point to your LAN and to Outside world. You want to have only one T1 connection on leaseline. for the backup for this part, you can go for ISDN Line. For this config, you can go abt to One Cisco 1750 Series Router with one WAN card and one ISDN Bri card. If lease line fails, now ISND will take care of the connectivity. For the redundancy part on Link the above is enough. But if you want to have hardware (If one Router or wan card fails) redundancy, then have two cisco 1750 series Router with same config, and we can run HSRP ( Hot standby Routing Protocol) between them.SO that your network will be up and live for all the time, even your LL fails or your card fails or your Router fails. Keeping both the Routers in different UPS supply, will add more redundent on it.
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