Reference
Reference
Built for the moment you already know what you need — just look it up.
Troubleshooting
Reference
Default Route Missing or Inactive
What happens when a router has no default route, and how to confirm one is present and active in RouterOS.
Reference
DHCP Client Not Getting an Address
Why a client doesn't receive a DHCP lease, and how to isolate the cause in RouterOS.
Reference
DNS Failure
Isolating DNS problems from routing problems when 'the Internet is down' but connectivity is actually fine.
Reference
Firewall Blocking Traffic
A process for finding which firewall rule is dropping traffic it shouldn't — or confirming the firewall isn't actually the problem.
Reference
NAT Not Working
Diagnosing why private LAN addressing isn't being translated correctly for Internet access.
Reference
Router Has No Internet
A structured process for diagnosing why a router can't reach the Internet, from physical link through DNS.
Reference
VLAN Connectivity Failure
Diagnosing why devices in the same or different VLANs can't reach each other.