I am in the planning phase of re-cabling our 5 racks in one of our offices and I would like to ask for some guidance on how you go, or would go about managing cables that goes between racks. In our situation we have 5 racks where the furthest to the right is our main patch panel for 300 floor ports. The rack next to it is our main comms rack where main switches and ISP routers are located. the other 3 racks next to the comms rack then all need to connect back to the main comms rack.
I am not sure if a 48 port patch panel in each rack would be any good for this scenario? mainly because i am not sure this can be linked back to the main switch with only 1 cable.
Would a 48 port switch in each rack be better as you can uplink those back to main switch?
Or should we just run cables between racks back to the main switch?
Hope someone can offer some guidiance.
Best Answer
My rule of thumb based on years of building server rooms: Minimize cross-rack cabling as much as possible.
The 300 port rack for the edge ports is far from full so you can place the edge-switches in the same rack. This keeps most of the cabling in the same rack.
The 3 racks to the left: I presume those hold your servers. Fit a cheap gigabit switch in each. Use 2 if you have servers requiring redundant links. HP ProCurves or Dells would fit the bill nicely. If you use 1 don't forget to cable it redundantly to your cores. If you use 2 redundant switches they only need a single uplink (to different cores) each.
Link all 4 racks with copper to your cores in the comms rack. Distances don't warrant fiber and copper is still a lot cheaper. Use multiple 1 GB copper links with aggregation to increase bandwidth if needed. 10 Gbs copper might be an option too depending on your cores/switches.
If you have servers that require a 1-on-1 link with a core or ISP equipment then just run an extra UTP cable. That is not going to kill you.
If your cores are big blade-switches that also carry the edge ports for the rightmost rack seriously consider moving those cores into that rack (space permitting). No one in his right mind wants to cable 300 UTP cables between racks.
You may have to spend some money on extra switches, but that will pay for itself by minimizing future support hassles.