Wi-Fi Troubleshooting

How to Troubleshoot specific connectivity issues using Marvis

Failing Authorization For this section we will be taking a client (38:78:62:40:de:e5) and giving a wrong password multiple times deliberately. Check Marvis with following command troubleshoot client 38:78:62:40:de:e5 – This will give you the answer to what is happening to the client for most of the time (The client failed to connect on 100% of...

AP Uptime – Network/WAN issues

Network/WAN issues have an impact on the AP Uptime metric either Switch Down or Site Down can be factors. Under the AP Uptime metric, click on Switch Down. Since the Statistics tab show 33% of Access Points are either unreachable or have  reboots, click on the Affected Items tab to see which access points have lost...

Checking the Activity Log of a Client

Here are some different methods of checking the Activity Log for a specific client: 1. Use Marvis to check client activity for the past 30 days Use either Natural Language Processing or our Query Language to show a list of client events for your client: To use Marvis, we require a SUB-VNA subscription.  Please see...

Guest Network doesn’t work

VNA can be effectively used to look for events associated to a particular WLAN. In this case one can search for all client events pertaining to the Guest WLAN. VNA can give a detailed description of all the events as can be seen from the above including the redirect URL, VLAN tag, AP BSSID. In...

Coverage Problems

Device  d8:32:e3:53:8d:80 complains for a low throughput (usually get 30 Mbps to 40 Mbps Download speed but complain was device is only getting between 5 Mbps to 7 Mbps). Throughput SLE Goal is set to 10 Mbps. For the issue you can use Marvis (VNA) Go to Monitor page→ WiFi Service Levels →Select the site...

One of my devices doesn’t work

Access Point Check for the led light status on the AP. All the led status and it’s error code are provided in the below link  https://www.mist.com/documentation/what-is-led-telling-me/ If APs dropped offline recently, please check if recent changes are made on switch side or on AP (Basically VLAN, IP or DHCP changes) APs require TCP port 443...

Voice/Video call drops

One of the most important and the first step is to ensure that Site Survey was performed. This ensures that proper coverage with adequate RSSI is available for the clients. Ensure that QoS is enabled on the WLAN. Please ensure that the same QoS is set on the wired side/VLAN as well. Device should be...

Can’t see Printer / Apple TV / Chromecast

Bonjour natively only works within a flat subnet and does not cross gateways without a proxy or multicast/broadcast bridge/route. Enabling these may cause an increased amount of broadcasts.  A simpler solution to access Apple TV across different subnets is to use bluetooth. By default we allow mDNS traffic to pass through the APs. If Bcast/Mcast...

Roaming Issues

Users run into two typical roaming issues. First one is they move from one area to another and the user gets subpar performance. This could be due to the client still connected to the farther AP and did not roam to the nearer AP, also known as sticky client behavior. Other typical issue is application...

Wi-Fi Doesn’t work certain times of day

If the Wi-Fi drops during certain times of the day, or there’s a difficulty in passing data it could be due to: Channel change on the AP Interference Client Load Channel change on the AP Our backend RRM algorithm upon detecting interference or radar may choose to change the channel on the AP. However the...