Internet disconnects and connection loops in a Keenetic Hopper DSL and Mercusys MR50G AP setup are typically caused by IP address conflicts, double NAT issues, or DHCP server collisions. By disabling the secondary router’s DHCP service, assigning static LAN IPs, and ensuring proper physical cabling between the WAN/LAN ports, you can stabilize your network connection and eliminate intermittent drops.
Understanding the Network Topology
To resolve these connectivity issues, it is essential to first understand how the two devices interact. The Keenetic Hopper acts as the primary gateway, handling the DSL connection, routing traffic, and managing the local network via its built-in DHCP server. The Mercusys MR50G, when configured in Access Point (AP) mode, should essentially act as a wireless bridge and switch, extending the network without interfering with the primary routing functions.
When users experience connection loops, it often indicates that the network stack is confused about where the default gateway resides. This confusion usually stems from misconfigured port assignments or conflicting network services running simultaneously on both devices. Ensuring that the Mercusys unit is strictly acting as an endpoint rather than a secondary router is the foundational step toward stability.
Physical Connection Verification
The physical layer of your setup must be verified before diving into software configurations. In a standard AP mode setup for the Mercusys MR50G, you should connect an Ethernet cable from one of the LAN ports on the Keenetic Hopper to a LAN port on the Mercusys MR50G. It is critical to avoid using the WAN/Internet port on the Mercusys device for this uplink, as doing so forces the device into router mode, creating a double NAT scenario that frequently leads to packet loss and disconnection loops.
If your specific firmware version allows configuring AP mode via software while using the WAN port, ensure that the "AP Mode" toggle is explicitly enabled in the web interface. However, the most reliable method remains the LAN-to-LAN connection, which bypasses the internal routing hardware of the Mercusys unit entirely.
Configuring the Mercusys MR50G
Before connecting the Mercusys router to the Keenetic network, configure it independently to prevent immediate conflicts. Connect a computer directly to the Mercusys MR50G via Ethernet and log into its admin panel. Navigate to the Operation Mode settings and select "Access Point Mode." If this option is not available, you must manually disable the DHCP Server feature.
Disabling the DHCP server is the most crucial configuration step. When the DHCP server is active on the Mercusys unit, it may attempt to assign IP addresses to devices on the network, leading to conflicts with the Keenetic Hopper’s DHCP pool. This conflict results in devices receiving invalid gateway information, causing the internet connection to drop and loop as devices repeatedly request leases.
Additionally, ensure that the LAN IP address of the Mercusys MR50G is set to a static address within the same subnet as the Keenetic but outside its DHCP range. For example, if the Keenetic uses
192.168.1.1, set the Mercusys to
192.168.1.2. This ensures you can always access the Mercusys management interface without losing network connectivity.
Optimizing the Keenetic Hopper Settings
With the Mercusys configured, turn your attention to the Keenetic Hopper to ensure it manages the network efficiently. Log into the Keenetic web interface and navigate to the DHCP settings. Verify that the DHCP server is enabled and check the address pool range. Ensure that the pool does not overlap with the static IP assigned to the Mercusys MR50G.
You should also review the wireless channel settings if you are using Wi-Fi extensively. While the Mercusys handles the wireless extension, interference between the two devices’ broadcast signals can cause instability. Use the Keenetic’s wireless optimization tools to select non-overlapping channels for the 2.4 GHz and 5 GHz bands.
For advanced stability, consider reviewing your DSL line settings. If you are experiencing sync issues alongside the network loops, checking your modem parameters might help. You might find relevant insights in our guide on
Should I enable bit-swap, and SRA in my VDSL Modem Router?, as line synchronization problems can sometimes manifest as intermittent connectivity drops that mimic router configuration errors.
Troubleshooting Persistent Loops
If disconnects persist after correct configuration, perform a power cycle sequence. Turn off both routers, wait thirty seconds, and then power on the Keenetic Hopper first. Wait for it to fully establish its DSL sync and internet connection before powering on the Mercusys MR50G. This sequence ensures that the primary gateway has claimed its network resources before the secondary device joins.
Check the ARP table on the Keenetic Hopper to see if there are duplicate MAC addresses or IP conflicts. If you notice frequent changes in the connected devices list, it may indicate a faulty Ethernet cable or a failing port on one of the routers. Replace cables and test different ports to isolate hardware faults.
Finally, ensure both firmware versions are up to date. Manufacturers frequently release patches that address stability issues in AP mode implementations. Keeping the Keenetic and Mercusys firmware current minimizes the risk of known bugs causing connection loops.
Frequently Asked Questions
Why does my internet drop every few minutes even after setting AP mode?
This symptom often indicates a DHCP conflict where both routers are trying to lease addresses. Ensure the Mercusys DHCP server is completely disabled and that the LAN IP does not fall within the Keenetic’s DHCP pool range.
Can I use the WAN port on the Mercusys MR50G for better performance?
No, using the WAN port typically enables router mode, creating a double NAT situation. This configuration is prone to connection loops and should only be used if you specifically need separate subnets, which is rare for home setups.
How do I reset the Mercusys MR50G if I lose access to the admin panel?
Locate the small reset button on the back of the Mercusys unit. Press and hold it for about ten seconds while the device is powered on until the lights flash, restoring factory defaults. You will then need to reconfigure it in AP mode.
Is it necessary to update the firmware on both devices?
Yes, outdated firmware can contain bugs related to DHCP handling and AP mode stability. Updating both the Keenetic Hopper and the Mercusys MR50G ensures you have the latest fixes for connectivity issues.
What should I do if the connection loops continue despite correct configuration?
Test with different Ethernet cables and swap LAN ports on the Keenetic to rule out physical hardware failures. If the issue persists, contact your ISP to check for line noise or DSL sync errors that could be mimicking network configuration problems.