What is the maximum DHCP pool on RouterOS Level 4

RouterOS General
1

Hello forum :slight_smile: please help me as I have searched and not found this answer.

I am using RouterOS Level 4 on a RB750 (AR7240 CPU, 32MB RAM)

I need a DHCP server to support quite a lot of clients.
If the RB750 is being used only as a DHCP server, what is the maximum recommended concurrent DHCP clients it can safely service?

2

My RB433ah could handle about 700 DHCP registrations.

3

Thank you rmichael.
From the information you have given me I have decided to run 2 x RB750s running only DHCP.
The DHCP pool will be a scope of 1024 addresses within the same network range.
This pool of 1024 addresses will be split 50/50 between the RB750s.

4

you can check here for license limitations:
http://wiki.mikrotik.com/wiki/Manual:License#License_Levels

afaik - dhcp server is not limited by license in any way. Only thing to care about is how much traffic you are going to push through the device and will it be able to handle that.

However splitting huge ethernet domain in smaller parts is good idea due to decreased broadcasts just to maintain the network.

5

There’s something wrong with ROS DHCP implementation. At about 700 registrations the RB433AH would start dropping packets and keep CPU at 100% - nothing to do with bandwidth.