How to optimize and reserve a local network?

Question

Computer networks

The situation is as follows... There is an existing network in a shared building. Away for rent 5 floors to the customer. The customer wants to make his own local network on these 5 floors and separate it from the general one.
Given:
1. Internet comes to WAN Kerio Gateway.
2. There is 1 pc L3 switch, also 5 pcs L2 switches
Task:
Optimize and reserve the LAN.
Known :
Floor subnets 172.16.201.1/24
172.16.202.1/24 172.16.203.1/24 172.16.204.1/24 172.16.205.1/24 friend via L3 switch? 2. What routing settings should be done on the L3 switch?
3. Default-gateway and DHCP where is it better to configure it?
Thanks in advance

Answer 1

All that needs to be done is to register as a gateway not a kerio, but an l3 switch, and learn Russian.

Answer 2

In the center of the network, an L2 + switch is sufficient or, as you have, L3. All client alans are terminated on it, on it you start on the vlan interface with an ip address - this will be a getway for each subnet.
On the same switch, configure DHCP-Relay (l2 + usually can) for each vlan.
Then you make a default route to your router, which will natit all your networks.
On the router, routes in response to each subnet.
If your hands are too lazy, do dynamic routing to taste.
As a result, networks run to L3 from there either to a neighboring vlan or to a router and to the Internet, depending on the request.
The dhcp-server can be anywhere, the relay will transfer everything to it.
If you need router reservation - buy 2 routers, configure vrrp. Or we do 2 routes with different weights - vrrp is better, of course.
The switch is backed up more difficult and more expensive, then if you simply do a cron task that dumps the config, commits and destroys the turnip in git.

Answer 3

Thanks to everyone who participated! The problem is solved, if you are interested, you can write in a personal. In this case, everything worked for me without the participation of DHCP Relay. Static Route was enough. Thank you all =)