Mist Wired Assurance and Switch Management
This domain tests how Mist manages Juniper EX switches: onboarding, templates, port profiles, and wired SLEs. Expect questions on ZTP, configuration precedence, and correlating a wireless symptom with the switch port.
What Wired Assurance covers
Mist manages Juniper EX switches for onboarding, configuration templates, port profiles, firmware, and wired SLEs such as switch health, port health, and wired client experience. Switches connect outbound to Mist; ZTP can pull configuration at first boot using DHCP options or console/USB.
Templates and port profiles
A switch template defines device-level config; port profiles define per-port behavior such as access or trunk mode, VLAN membership, PoE, 802.1X, and storm control. Assign profiles to ports in the template or through a site override. Virtual Chassis is supported, so configure members consistently.
Telemetry and troubleshooting
Switches stream telemetry to Mist, and Marvis can correlate a wireless problem with the upstream switch port: PoE budget, CRC errors, or a VLAN mismatch.
Worked example: a new EX switch powers up but never appears in Mist. ZTP may be disabled, DHCP may not offer the ZTP options, or outbound 443 is blocked. If it appears but ports behave incorrectly, the port profile is missing or a site override is superseding the template.
Traps: assuming non-Juniper switches get full Wired Assurance; editing a port directly and later having the template overwrite it; mismatched VLANs between the AP trunk and the switch port profile.