topic Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow in Wireless

APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit power

alcan90 — Sun, 10 Aug 2025 18:26:04 GMT

A few weeks ago, I updated several AP networks including MR86, MR56, and MR models to firmware version MR 31.1.7.1. After the update, the APs began experiencing issues with radio transmit power on both the 2.4 GHz and 5 GHz bands. The transmit power dropped significantly from 23 dBm to 7 dBm, leading to serious coverage and connectivity problems for Wi-Fi devices.

We opened a case with Meraki Support, and they informed us that this appears to be a known bug affecting the MR31X firmware versions. Currently, there is no workaround available, and we were advised to downgrade to version MR30.6 as a temporary solution.

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

RWelch-USA — Mon, 11 Aug 2025 03:25:51 GMT

Thanks for sharing this info.

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

CMR — Mon, 11 Aug 2025 07:33:33 GMT

@alcan90 what country are you in? As you can see below, in the UK these APs are doing better than 7dBm on 31.1.7.1:

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

aneduzhk — Mon, 11 Aug 2025 20:17:22 GMT

Hi @alcan90 , which regulatory domain your network is using?

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

alcan90 — Tue, 12 Aug 2025 01:12:42 GMT

Hi @CMR , all the nentworks are in the counrty of Honduras. They have been working normally on version MR30.6.

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

alcan90 — Tue, 12 Aug 2025 01:16:03 GMT

Hi @aneduzhk , we use the regulatory domain CONATEL_HN, configured for our counrty, Honduras.

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

aneduzhk — Wed, 13 Aug 2025 00:33:48 GMT

Thanks! Could you DM a link to your network?

Re: APs MR56 and MR86 after upgrading to MR31.7.1, began experiencing issues with radio transmit pow

Sammy21 — Sun, 24 Aug 2025 08:15:14 GMT

We have issues with MR 31.1.7.1 firmware too. Clients do not roam easily and are stuck with the AP, and despite being in the same spot, they keep getting jumped from one AP to another. There is a stability issue with the current firmware. We are using only 5 GHz with a transmit power of 10-18 with auto channels on MR56. Planning to roll back on MR 31.1.6.