Internet WAN connection dropping frequently
4.5
The connection between the router and the internet modem is unstable.
Symptoms
- Internet cuts out briefly
- Router logs show WAN down
- Online gaming lag spikes
Possible Causes
- DHCP lease issues
- MTU size mismatch
- Overheating router
Step-by-Step Fix
1
Update Router Firmware
Fixes known stability bugs in the WAN stack.
2
Adjust MTU Size
Try lowering the MTU to 1472 or 1400 in WAN settings.
3
Clone MAC Address
Some ISPs require the MAC address of the original connected PC.
When to See a Technician
Frequent WAN drops can be caused by a "flapping" port on either the modem or the router.
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