Description

Mist is showing the following alert:

 

Symptoms

- Mist alert means that uplink port ge-1/0/13 from SW1 and downlink ge-0/0/0 from SW2 have mismatching vlans and port mode.

- However, these ports were not connected to each other. The connections were like this:

   [SW1] ge-0/0/17 ------- ge-0/0/0 [SW2]
     |                                |
ge-1/0/13                            me0
     |                                |
     +--------------------------------+

- We can observe that this loop is causing confusion because of how the mac learning is happening.

Solution

Removing the looped cable between ge-1/0/13 and me0 resolved the alerts.

Modification History

2026-06-15 : Article Created