MikroTik

I trying to work with two PCRouters connected at same public network, each w/ proper valid IP address but something happen that traffic is growing a lot when they are connected, same thing when LOCAL interface is disconnected. It resemble like communications betweens two router themselves. Please somebody could give me some support?

make a quick drawing of your network, it's hard to understand your setup

do you have some interfaces in bridge mode?

Thanks a lot for interest. The setup is very easy. We have one internet access (ADSL) w/ 6 valid IPs address connected to a switch. The two PCRouters are in the same switch, using "Public" interfaces, each one of them with proper IP address. Each PC router configured to serve two different “Local” networks .

ADSL>SWITCH>PCRouters (A and B)>Local A and B networks

Thanks a lot for interest. The setup is very easy. We have one internet access (ADSL) w/ 6 valid IPs address connected to a switch. The two PCRouters are in the same switch, using "Public" interfaces, each one of them with proper IP address. Each PC router configured to serve two different “Local” networks .

ADSL>SWITCH>PCRouters (A and B)>Local A and B networks

Sorry I forgot to say that two LOCAL interfaces are setup for HOTSPOT mode

traffic is growing a lot when they are connected

What kind of traffic? Are you looking at an ARP or Broadcast storm between the two routers? Maybe you've got a device inside the network that's connected to both the A and B networks and you've got a loop that is causing problems.