Meraki MR42 got unpredictable service interruption on 5G

Hello experts,

I have 2 MR42 and work with the newest version of OpenWRT. But intermittently, the 5G channel got zombied and all attached devices were moving to other APs.

Below error messages were flooding during the phenomenon occurring.

[312394.688818] Rekeying PTK for STA ea:73:07:45:15:40 but driver can't safely do that.
[312394.688849] ath10k_pci 0000:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0  arvif->paused: 0x0
[312421.708740] Rekeying PTK for STA ea:73:07:45:15:40 but driver can't safely do that.
[312421.708772] ath10k_pci 0000:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0  arvif->paused: 0x0
[312444.158845] Rekeying PTK for STA ea:73:07:45:15:40 but driver can't safely do that.
[312444.158876] ath10k_pci 0000:01:00.0: mac flush vdev 0 drop 0 queues 0x1 ar->paused: 0x0  arvif->paused: 0x0

Does anyone has the same experience as me?

What channel are you using for your 5G radio and what is your region? Probably a DFS channel.

2 Likes

Absolutely correct! I move the channel to a non-DFS channel and the AP has worked stable for one week.