Mikrotik router duplicates every single IP address on the network

RouterOS General
1

Hello,
Please look at the following arrangement (groove 52hpn):
A wireless interface, three ethernet ports, ether1 is POE.
Winbox.JPG
31 radios with this configuration were installed on the wireless network. From the instalation I’ve been having some issues related with IP address duplication:
IP.JPG
For some reason, the radio duplicates every single IP address on the network keeping its own MAC address, when this happen, the network becomes unestable and after some time, it goes down. The duplicated MAC address belongs to to ether1.

Any thoughts?

PS Pardon my English, my skills with the language are quite basic.

Thank you,
Hugo

2

Do you have proxy-arp enabled on the interface?

3

My bad, the correct model for my radio is RB433GL.

Hello Troffasky, thanks for your reply.
No, the ARP is disabled. I was playing switching from enabled to disabled expecting to see any different behaviour, nothing so far.

Regards,
Hugo

4

Please post the /export of your configuration

5

Copy & Pasted the configurations across the 31 radios? Perhaps, including the statically configured MAC addresses?

6

Check the mode of the wireless interfaces. If memory serves me correctly, the ap-psuedobridge may be causing this.

7

Hello everyone, thanks for your comments.
I am including the configuration for the CPE, Bridge, Wireless and Ethernet1, there is no extra configuration on the rest of tabs:
1CPE.JPG
2bridge.JPG
3wlan1.JPG
4wlan2.JPG
5ether1.JPG
6ether2.JPG
7ether3.JPG

8

https://wiki.mikrotik.com/wiki/Manual:Wireless_Station_Modes#Mode_station-pseudobridge

^^ I figured the problem was ap not station. Either way you really don’t want to use that mode and it is very possible this is the cause of the issue.

(mode of your wireless interface)

If you are using a complete MikroTik network you should be using station-bridge or station-wds. Please confirm if the device on the other-side of the wireless link is a MikroTik device or not. Additionally, we really need a:

/export

Your screenshots do not show the bridge configuration or the IP address section clearly. If proxy-arp is enabled on the bridge you may be seeing this behavior as well.

9

Hello everyone, thanks for your replies. Here is the config file:
backup.rsc (22.5 KB)
Hope it helps.

Regards,
Hugo

10

Post an export here not a backup file. Login via SSH or Telnet and run /export or /export hide-sensitive

Did you see my post above? Is the other side of the wireless link a MikroTik AP?

11

I am sorry, I was trying to figure out how to get the file, I am new using Routeros. Hope this is the right one:
config.rsc (1.11 KB)
No, for the APs I have Extreme Networks (Motorola) Mod:8163

Thank you,
Hugo

12

Login via SSH or Telnet and type /export into the command line. Copy and paste the output here.

13

Did you use .backups from one radio to setup the rest of the radios? if so, that would be where your problem lies.

.backups are only intended for a given device with a given ROS version. They’re not meant for configuration mass deployment as it contains MAC addresses from specific device it was taken from.

To do so, you should use exports (.rsc) which are device neutral with regard of MAC addresses.

If this was the problem, you’ll need to go to each device and issue

/interface ethernet reset-mac-address [find]

For wireless interfaces, you’ll need either to guess the original MAC and set it manually, or reset the wireless interface configuration (physical visit).