Small office network - one node or one node per department?

Question

Computer networks

There is a small office: no more than 400 sq.m, about 50 users + about 20 phones (analog PBX, but there are plans to switch to IP), about 15-20 more network devices (mainly printers and MFPs), maybe someday IP surveillance cameras will appear in the future (no more than 15-20). Most of the users sit in two large rooms (about 15 users each), the rest are rooms for 1-2 people.
In connection with the relocation of the server room, a network re-laying is required. How would you do it - one node (switch) for all devices (in the server room), or several nodes (switches): one in large rooms, one more for the office part, one for the reception and two management rooms, and one more - central to the server room?
I’m more inclined towards the first option (the key equipment is at hand, any outlet can be immediately switched to PBX + without leaving the server room), but maybe there are ideologues of the second option and will give their arguments.
Thank you!

Answer 1

Of course, there should not be any switches in the rooms where people sit. Otherwise, instead of a wired network, there will be networks of wires. Place everything in the server room, if the maximum distance does not exceed 70-80 meters, otherwise do takeaways, but definitely not in every room.
Put one central switch more powerful (better distribution-level), the rest are simpler. Connect servers and other switches to the central one. For IP telephony / cameras, it is better to lay a separate switch / switches, consider the option with PoE.

Answer 2

1. One 24-port tsiska in the office makes noise like several desktops loaded and buzzing with coolers.
2. It is better to control everything from one-2x-3x centralized places - server rooms, cabinets somewhere in the corridor.
3. 2x core switches with stp / vtp and two links each for all other switches - there have been situations when one link beats, but the second one survives, respectively, the segments do not fall - ideally, run the cable in different routes.
PBX - you can connect asterisk + some office PBXs - on one of the previous work, we had a channel through h323 and e1 from ATSka to an asterisk with a common dialplan.
it’s better to go for gigabin switches now - the same 3com and extremes I had in packs at my last job - and only one died from overheating.
PoE - power over ethernet - convenient - we have one of the cisco wifi working from the cisco switch.

Answer 3

>Anastasia_K
What are hundreds of thousands for flooded switches? Do they burn like pies every day? To fill or swim it you need to try very hard. At the extreme, buy a spare. Change it in 20 minutes maximum. And if people are added to the room, it’s also necessary to throw pacifiers.
What if there is a change?
>z3apa3a
Only if the office expands, will you have to throw it again or throw empty shells at the beginning. Well I do not know. If the company is ultra dependent on the Internet, you can and will spend money on wires thrown by a star to the server room. And if an ordinary office where without an Internet for 10 minutes everyone can go to smoke - I consider it logical to have an ordinary open switch, with a bunch of wires scattered around the office and one to the server room. Well, why administer them, if the grid falls, yes, there is a chance that the switch is frozen. But this is not so difficult to solve with a simple restart. No one breaks off once a month (which is extremely common!) to sit for 10-20 minutes without an Internet connection. There are always things to do even without the Internet. This is not a poker club.
Savings are reasonable. A switch with an uninterruptible power supply and a closed cabinet is a luxury for a room of 15 people.)
But if this is not a poker club)

Answer 4

I can advise the following points:
1. You definitely need to buy switches with POE (now all digital cameras come with POE + IP phones)
2. The wires should definitely be connected to the server room, if it turns out to be long, then put an intermediate managed hub somewhere in the corridor
3. Switches to take managed ones cut into VLANs (for example, by offices / departments) have not yet been installed immediately
4. When laying the number of sockets, count on how many people are planned for the future + 20%
If these points are met, then in the future you can avoid hemorrhoids and costs associated with laying cables for finished repairs!

Answer 5

Read on the subject of SCS - start with the wiki . It contains the names of all the standards that SCS must comply with and the relevant literature, which is very interesting and useful by the way.