Yes, you can definitely limit the bandwidth for some machines on your network using a MikroTik router to ensure that others have higher speed availability.

This is especially useful in environments where certain machines or tasks require higher priority in terms of network resources. Here's how you can set this up:

Steps to limit bandwidth in MikroTik:

1. Identify IP addresses: First, you must identify the IP addresses of the 5 machines you want to limit the bandwidth to. Make sure these IP addresses are fixed (static IP) or that you have DHCP reservations so that the addresses do not change.
2. Access your MikroTik RouterOS: Connect to your MikroTik using WinBox, WebFig or any other management interface you prefer.
3. Create a simple queue:
   • Go to Queue and then to Simple Queue.
   • Click on the + to add a new queue.
   • In the section General, assigns a descriptive name to the queue.
4. Configure bandwidth limits:
   • In the section Target, enter the IP addresses of the machines you want to limit bandwidth to.
   • En Max Limit, set the maximum upload and download limit you want for these IPs. For example, if you want to limit to 5Mbps downstream and 1Mbps upstream, configure it here.
5. Apply and monitor:
   • Click on OK to apply the settings.
   • You can monitor bandwidth usage from the same window. Simple Queue to see if the rules are working as expected.

Additional Tips:

• Priorization: If in addition to limiting you want to ensure that other machines have priority, you can use the Priority within queue configurations to give higher priority to traffic from certain IPs over others.
• network segmentation: Consider segmenting your network using VLANs if you want more control and security over how traffic is distributed on your network.
• Regular tests: After configuring queues, it is good to perform speed and performance tests to make sure the configurations are working as intended and adjust as necessary.

By implementing these steps, you can effectively manage bandwidth within your MikroTik network and ensure that resources are optimally distributed according to the needs of your organization or home.