Wi-Fi Troubleshooting

Alert Framework

The Alerts page on the Mist dashboard will help you maintain full and constant visibility across your sites.  Here, you may view the full list of alerts detected on your site.  You may also configure alerts to receive Email notifications for certain types of events detected on your network. To configure your Alert Template, navigate...

Alert Types

There are three groups of alert types which are separated into their own sections: Infrastructure, Marvis, and Security.  Red alerts mean the issue is critical.  Orange alerts signal a warning – it may or may not be an issue, but it would be good to monitor.  Blue alerts are just informational, and do not need...

AP Troubleshooting steps

  Rebooted because of crash APs would send the crash logs to Mist and we would check that in our system. Nothing to worry about, we are looking at all crash logs and rapidly fix them. No action needed. Rebooted due to Firmware upgrade Firmware upgrade event is displayed in UI in the audit logs.  The...

AP Unable to Reach the Mist Cloud?

When an AP is unable to reach Mist Cloud, you can follow the below steps before opening a ticket for the Mist support team. And even after that the same issue persists, feel free to open Support ticket for the Mist Customer Success team. We sincerely request you to provide the below details so that...

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...

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...

Cannot connect to Wi-fi

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’ ,...

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...

Dynamic Packet Captures

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. Dynamic Packet Captures are automatically saved and available for you...

Guest Network doesn’t work

Marvis 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. Marvis 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...

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...

Learning about about disconnected AP’s

When an AP has power but can’t connect to the cloud the LED will blink out a series of codes to tell you why. At the same time the AP will be sending BLE messages to nearby AP’s to report its problem.  That makes it a lot easier than having to go look at the...

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...

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...

Setting up Wireshark for packet captures

If you are having trouble opening up our Dynamic or Manual packet captures in Wireshark, please make sure your settings match these below: 1) Open up the preferences window (Edit -> Preferences on Windows, or Wireshark -> Preferences on Mac) 2) Navigate to Protocols -> IEEE 802.11 and make sure to select Yes – with IV under Ignore the Protection bit Click on OK to...

Troubleshooting an AP negotiating at the wrong speed

1. Run the below commands on your switch to check the speed information on the port: show cable-diagnostics tdr int <Interface_name> show interf status   2. Please change the cable connecting the AP to the switch with a known working cable. If possible, swap it with a cable being used by an AP with no...

Troubleshooting AP Disconnect Issues

Use this guide to help with troubleshooting issues for APs disconnecting from the cloud without opening a ticket to the support team. To troubleshoot the issue, we need to know the possible cause of this issue. The LED on the Mist AP can be very helpful if the AP ever has a problem connecting to...

Troubleshooting steps for client issues

Check SLE in UI, based on the kind of the issue. Time to Connect SLE: Issues related to DHCP, etc. Click on DHCP classifier, click on “Affected Items” tab for all the clients affected for DHCP. Client on Authorization, Association and follow the above procedure for the appropriate failures. Successful Connect SLE: Issues related to...

Troubleshooting with SLEs – Deep Dive 01-2023

Mist Juniper Service Level Expectations (SLE) shows the client experience on your network at any given point in time. Use the SLE page to measure and manage your network proactively by identifying pain points before they become too big of an issue. Do you want to know how your network is doing today? SLEs can...

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...

What is LED telling me?

    The LED on the Mist AP can be very helpful if it ever has a problem connecting to the cloud. It will blink out error codes to explain exactly what the problem is. Below is a chart of these codes or you can have someone take a short video of the sequence and...

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...

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...