WiFi Troubleshooting

Troubleshooting with SLE’s and Marvis

This a great video done by Wes Purvis walking through how to use the SLE’s in an operational context.  He also follows with doing the same with Marvis. It was not a great room to film in so we recommend you make this full screen. This page is also available on mist.com/documentation  

Wired Packet Capture

Wired Packet Capture (requires 0.5.x or newer firmware) Wireless packet captures are helpful when trying to dissect and dig down into the root cause of any wireless issue between a client and AP.  You can determine if packets being sent are actually reaching their destination as well as identify if packets are corrupted.   With our...

Cannot connect to Wifi

How to Troubleshoot Issues reported using SLE Issue reported: Multiple clients are not able to connect to network on a given site. One needs to start with the SLE listed below: ‘Successful connects’ Check SLE ‘Successful connects’ ; check what classifier are contributing to connection failure. DHCP Click DHCP under the SLE ‘Successful Connects’ ,...

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...

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...