I have mikrotik router connected to EAP225, EAP110, CPE510 connected to port 6,4 and 2(LAN bridge) in office, WAN input is dynamic IP from ISP connected to port 3. The CPE510 is setup as AP with another CPE510 at home setup as STA. When CPE510 is turned off, the EAP225, EAP110 works just fine, that is have wireless access to the internet. when connected to EAP110 or EAP225, the PC address is 192.167.50.226(provided by mikrotik DHCP server), gateway is 192.167.50.1(mikrotik router IP). I have configure the office CP510 as AP with static IP 192.168.2.2 and the CPE510 at home with static IP 192.168.2.3. When the CPE510 is turned on, there is not internet from EAP110, EAP225. In this case, the PC connected to EAP110,EAP225 has IP 192.168.2.X with gateway IP of 192.168.2.2 which is CPE510. All three CPE510, EAP110 and EAP225 are installed on my office balcony. So why is this happening?
This is a classic IP conflict and DHCP overlap problem in your setup. Let me break it down in simple terms.
- The MikroTik router is supposed to be the main gateway (192.167.50.1) and DHCP server (giving clients addresses like 192.167.50.x).
- The CPE510** at the office is configured with a static IP (192.168.2.2), and the one at home with 192.168.2.3.
- The moment you turn on the office CPE510, devices connecting to your EAP110/EAP225 stop getting 192.167.50.x addresses and instead get 192.168.2.x with gateway 192.168.2.2.
That means that the office CPE510 is acting like a router or DHCP server, overriding the MikroTik’s LAN bridge. Basically, the CPE510 is no longer just a transparent bridge — it’s giving out its own network (192.168.2.x).
This explains perfectly why your EAP110/EAP225 clients lose internet when the CPE510 is powered on: they’re being pushed onto the wrong subnet (192.168.2.x) with the wrong gateway (192.168.2.2), so traffic doesn’t reach the MikroTik.
Why it happens
- CPE510 defaults to Router Mode or has its DHCP server enabled, instead of being in Bridge / Access Point mode.
- In Router Mode, it NATs or hands out its own IP addresses (192.168.2.x), hijacking your network.
How to fix it
1. Log into your office CPE510(192.168.2.2).
2. Change its operation mode to Access Point (AP) / Bridge mode, not Router.
3. Disable DHCP Server on the CPE510 completely.
4. Keep its static management IP (192.168.2.2) outside your MikroTik DHCP pool (so you can still log in for management).
5. On your home CPE510 (STA mode), also disable DHCP. It should just act as a client bridge, passing traffic back to the MikroTik.
Once this is done, all clients connecting to the EAP110/EAP225 (and even at home through the CPE link) should only see the MikroTik DHCP (192.167.50.x) and MikroTik gateway (192.167.50.1), which is the correct setup.
