Mist AI Operations and Troubleshooting for Wired Networks
Domain overview
Mist AI Operations and Troubleshooting for Wired Networks tests how you use Mist cloud analytics and Marvis to find wired faults: SLEs, alarms, insights, topology, port statistics, and Marvis Actions. The exam expects you to interpret evidence rather than guess.
Core rules
- Wired Assurance collects switch and port telemetry: up/down state, CRC and alignment errors, PoE draw, LLDP neighbors, traffic, and DHCP/ARP behavior.
- SLEs score the user experience for a site; a drop in a wired SLE should be correlated with alarms, affected switches, ports, and clients.
- Marvis Actions surface prioritized root causes, such as bad cable, port flapping, PoE budget, DHCP failure, VLAN mismatch, or loop/STP issues.
- Marvis can answer natural-language questions and summarize impact; use it to shorten triage, then verify on the switch and port.
- Topology and LLDP neighbor data help distinguish an access-port problem from an uplink or distribution problem.
Worked example
Users on one floor report intermittent wired slowness. The site's wired SLE drops. Marvis Actions shows Bad Cable on the uplink from the floor switch, and the port has rising CRC and alignment errors. The access ports look clean. Reasoning: CRC errors point to the physical layer, not VLAN or 802.1X. Replace the uplink cable and verify that CRC counters stop rising and the SLE recovers. If the action had shown DHCP failures instead, you would check the relay and server reachability before touching cabling.
Traps
Do not treat every wired complaint as wireless. Do not replace a switch before checking a single port's error counters. Do not ignore PoE budget or port flapping because the link is up. Do not assume an SLE drop is caused by the most recent alarm without checking affected scope.