3 subnets talk to each other in routerboar RB1100 ah

RouterOS General
1

Dear All,

I have 3 different subnets: 2 HDSL 4 mg Up and 4 down, and 1 Microwave 3 mgb UP and 3 mgb Down:

I need to make that subnets to talk to each other.

How i can do that i router board RB1100ah. Kindly find the attached network map for what i try to implement.

Many thanks,

2

The router will route between the 3 networks automatically as long as you have not specifically blocked it in the firewall.

Just make sure you have the router’s IP set as the default gateway in your connected devices.

3

Dear jandafields,

would you plz explain that by writing the all steps,

thanks for your reply.

4

I assume that right share is x.x.4.0/24 subnet not repeated x.x.1.0/24 one.

For each group you need to bridge out-ethers.
Remember to pull-out/remove each port from switches: http://i.mt.lv/routerboard/files/Block-RB1100AHx2.pdf
Pulling-out/removing means that any port should not have “master port” set.

/interface bridge
add name=BRIDGE0
add name=BRIDGE2
add name=BRIDGE4
/interface bridge port
add bridge=BRIDGE0 interface=ether2
add bridge=BRIDGE0 interface=ether3
add bridge=BRIDGE0 interface=ether4
add bridge=BRIDGE2 interface=ether6
add bridge=BRIDGE2 interface=ether7
add bridge=BRIDGE4 interface=ether9
add bridge=BRIDGE4 interface=ether10
add bridge=BRIDGE4 interface=ether11
/ip address
add address=192.168.1.254/24 interface=ether1 network=192.168.1.0
add address=192.168.3.254/24 interface=ether5 network=192.168.3.0
# ether8 has unknown all parameters....
#add address=195.200.112.22 interface=ether8
add address=192.168.0.1/24 interface=BRIDGE0 network=192.168.0.0
add address=192.168.2.1/24 interface=BRIDGE2 network=192.168.2.0
add address=192.168.4.1/24 interface=BRIDGE4 network=192.168.4.0

Now you need to set gateway, masquarading, dhcp, default routes for each in - out group…standard steps

As all bridges and in-ethers are known to router it means that it knows routes so it could route packets between networks.
You need to set filters to prevent visibility.

5

Dear BartoszP,

would you please do a favor and complete the solution because I am a new student in mikrotik and I don’t know how to write the script.

Thanks for your help,

6

You should really read the manual, the wiki, and just start playing around with it. You will learn how to do this on your own very quickly. Use winbox, it will help you get started quicker.

7

thanks for guide me in mikrotik, I did everything gateway, NAT, and route but, I don’t understand

“You need to set filters to prevent visibility.” would you please explain how to do it.

Many thanks,