# ePMP Software Release 5.9.1 is now available
**URL:** https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770
**Category:** ePMP
**Tags:** release-notes
**Created:** [December 6, 2024, 5:49pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770 "2024-12-06T17:49:41Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 6, 2024, 5:49pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/1 "2024-12-06T17:49:41Z")
## Supported Platforms
- ePMP AX Platforms
- ePMP AC Platforms
- ePMP N Platforms
## Download the firmware and documentation from:
- [Force300-13L, Force300-25L](https://support.cambiumnetworks.com/files/epmp_f300_13l)
- [Force300](https://support.cambiumnetworks.com/files/force300_sm)
- [ePMP 3000, ePMP 3000L](https://support.cambiumnetworks.com/files/epmp3000)
- [ePMP 4xxx, Force4xxx](https://support.cambiumnetworks.com/files/epmp_400_425)
- [ePMP 1000/2000](https://support.cambiumnetworks.com/files/epmp1000_2000_ap)
- [ePMP 1000 Force 100/110/180/190/200 SM](https://support.cambiumnetworks.com/files/epmp1000sm)
- [ePMP Elevate](https://support.cambiumnetworks.com/files/epmp-elevate)
- [Force 130](https://support.cambiumnetworks.com/files/force130_sm)
- [ePMP WOM](https://support.cambiumnetworks.com/files/epmp_wom)
### Features
None
### Problems Corrected
| Tracking ID | Products | Description |
| --- | --- | --- |
| AXG-3749 | All | Fixed a crash with the signature “Target assert on ar\_wal\_monitor.c:913,” which could occur on rare occasions. |
| AXG-8669 | All | Fixed a crash with the signature “ABT\_Handle\_Interrupt + 0x114 (NOC\_error.c:357),” which could occur on rare occasions. |
| AXG-10503 | All | Fixed the issue preventing users’ passwords from updating after applying the appropriate cnMaestro template. |
| AXG-10522 | All | Fixed the issue where SMs could disconnect with the INVALID SECURITY KEY reason under strong interference. |
| AXG-10625 | All | Fixed the issue causing MCS fluctuation and packet loss in ePTP mode. |
| AXG-10732 | All | Resolved a problem that caused packet loss, high jitter, and increased latency in TDD mode during peak load times. |
| AXG-10852 | All | Fixed a crash with the signature “Assertion camb\_eap\_hw\_flush\_wa.c:111(tx\_dm\_dynamic\_fc\_timeout + 0x0),” which could occur on rare occasions. |
| AXG-10856 | All | Resolved an issue where the Tx Power settings configured through the UI were not applied correctly. |
| AXG-10904 | All | Resolved a graphical issue that caused an unexpected grey background to appear on the Spectrum Analyzer chart. |
| AXG-10928 | All | Fixed an issue preventing ETSI-locked F46xxs from switching to Access Point mode. |
| CAMBIUM-19899 | All | Fixed the issue where the Throughput chart failed to display on the Wireless Link Test. |
### Limitations
When upgrading the radio firmware from versions earlier than 5.7.2 to version 5.9.1, the **Separate Wireless Management Interface** may lose its Subnet Mask configuration.
**Recommended Workaround:**
Prior to the upgrade, disable the Separate Wireless Management Interface. Once the upgrade is complete, re-enable it. This process can be efficiently performed using a cnMaestro template.
---
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 6, 2024, 5:51pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/2 "2024-12-06T17:51:59Z")
It is already available in Downloads. As usually cnMaestro will have it slightly later.
---
### Author:  [@GREG3f](https://community.cambiumnetworks.com/u/GREG3f)
#### Post date: [December 9, 2024, 8:27pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/3 "2024-12-09T20:27:50Z")
Does this release have the legacy force200 to 4500 compatibility? Does it require a CLI command like the RC versions? If so, what was the command again?
---
### Author:  [@Andrew\_Ritz](https://community.cambiumnetworks.com/u/Andrew_Ritz)
#### Post date: [December 9, 2024, 10:29pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/4 "2024-12-09T22:29:54Z")
Does this fix the issue with MIR? We were told not to implement the MIR after all the CPEs dropped from the AP.
---
### Author:  [@Fedor](https://community.cambiumnetworks.com/u/Fedor)
#### Post date: [December 9, 2024, 10:59pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/6 "2024-12-09T22:59:51Z")
> [@Andrew\_Ritz](#):
>
> Does this fix the issue with MIR?
Not yet. The fix is coming soon.
> [@GREG3f](#):
>
> Does this release have the legacy force200 to 4500 compatibility? Does it require a CLI command like the RC versions?
Yes, it requires the CLI command in 5.9.1 too.
`allow_bc_n`
Thank you.
---
### Author:  [@Eric\_Ozrelic](https://community.cambiumnetworks.com/u/Eric_Ozrelic)
#### Post date: [December 10, 2024, 7:34pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/8 "2024-12-10T19:34:34Z")
It always takes way longer for the cnMaestro team to add ePMP firmware because they have to validate like 8 or 9 different 5.9.1 builds… e1k/e2k (regular and GPS), e3k, e4k, along with the elevate builds, the F300L, and 130 builds, etc.
---
### Author:  [@Eric\_Ozrelic](https://community.cambiumnetworks.com/u/Eric_Ozrelic)
#### Post date: [December 12, 2024, 6:32pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/9 "2024-12-12T18:32:44Z")
Looks like 5.9.1 is now up in cnMaestro Cloud!!
---
### Author:  [@Ing\_Net](https://community.cambiumnetworks.com/u/Ing_Net)
#### Post date: [December 13, 2024, 2:47pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/10 "2024-12-13T14:47:35Z")
We are having an issue with 5.9.1 firmware. On ePMP4600. When antenna is set to Omni, the radio does not upgrade. When upgraded on antenna mode sector and try to change after that to Omni , the radio does not respond. this issue was not on 5.9.0 .
---
### Author:  [@Alessio\_Garavano](https://community.cambiumnetworks.com/u/Alessio_Garavano)
#### Post date: [December 16, 2024, 11:13am UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/11 "2024-12-16T11:13:02Z")
Hi, why the CPU Load in the v5.x is the double or triple higher than in v4.xx? it is the new normal load by some function or why?
---
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 16, 2024, 11:30am UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/12 "2024-12-16T11:30:33Z")
Hello @Alessio_Garavano and @Ing_Net,
could you PM me techsupport files when your issues are in progress?
---
### Author:  [@Makoto](https://community.cambiumnetworks.com/u/Makoto)
#### Post date: [December 16, 2024, 2:27pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/13 "2024-12-16T14:27:54Z")
Hello, same here all my epmp3000 APs double or Triple CPU load ! Epmp2000 all over the place but same as 4.8v. , watching over cnmaestro !
---
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 16, 2024, 2:53pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/14 "2024-12-16T14:53:52Z")
Hello @Makoto,
could you PMP 2-3 techsupports from your radios?
Thank you!
---
### Author:  [@Alessio\_Garavano](https://community.cambiumnetworks.com/u/Alessio_Garavano)
#### Post date: [December 16, 2024, 7:42pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/16 "2024-12-16T19:42:02Z")
Hi Andrii, there is not an issue, you can see in the post [5.9.0rc13](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-0-rc13-beta-is-now-available/101666/21) where i do this question and send a lot of graphics from the cnmaestro showing about this… so my question continue, why is this high cpu load normal now? is the NSS disabled by default using the CPU or what is the cause? can this issue affect the performance, traffic and the lifetime of devices?
---
### Author:  [@terintamel](https://community.cambiumnetworks.com/u/terintamel)
#### Post date: [December 18, 2024, 12:45am UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/17 "2024-12-18T00:45:04Z")
I upgraded 3 APs. One was a 4500L on Dec 6th and the other two were 4600 APs on Dec 12/13th. The 4500L had one SM while each 4600 AP has 3 SMs each.
I just noticed that on the 4625 SMs that they all lost around 3-5db of reported RX signal after the upgrade from 5.9.0 while the 4525 SM showed no change.
A downgrade to one of the 4625 SMs did not restore the old RX signal. I am trying an AP downgrade as well to see if RX signal is restored.
So far I am not sure if this is affecting performance or not, but the RX signals and SNRs on all the 4625 SMs are lower than before the upgrade.
I verified that the 4600 APs are still on the same channels and are still operating at full power levels. There was no change.
Was there some change to the 4600/4625 equipment specifically with this FW that could explain this?
---
### Author:  [@terintamel](https://community.cambiumnetworks.com/u/terintamel)
#### Post date: [December 18, 2024, 8:16am UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/18 "2024-12-18T08:16:57Z")
I can confirm that a downgrade back to 5.9.0 restored the reported RX signal on the SMs.
---
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 18, 2024, 5:54pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/19 "2024-12-18T17:54:34Z")
Hello @terintamel,
yes, there are manipulations with signal level indication and Tx Power settings.
The right way to confirm that everything is ok: match MCS level before and after upgrade.
If it is the same - everything works fine. But in most cases I see it becomes even better. Like + 1-2 stable MCS levels.
I saw your support ticket. We need techsupports before and after to compare. Of course, better if it was done at one time.
---
### Author:  [@terintamel](https://community.cambiumnetworks.com/u/terintamel)
#### Post date: [December 18, 2024, 6:07pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/20 "2024-12-18T18:07:07Z")
I have provided support files from 5.9.0 after I downgraded. I will upgrade back to 5.9.1 in the next day or two and then grab the support files for the ticket.
MCS did not seem to change. It did not improve or decrease, just an RX SNR and RSSI change.
---
### Author:  [@SBBinc](https://community.cambiumnetworks.com/u/SBBinc)
#### Post date: [December 20, 2024, 4:51pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/21 "2024-12-20T16:51:47Z")
We upgraded two of our F425 links to 5.9.1 and the slaves immediately became inaccessible via web gui or ssh after upgrade. They also stopped responding to snmp entirely, and show offline in cnMaestro. They still respond to ping and are still passing traffic though…what gives? Opened a ticket, but wondering if anybody else has seen this too.
---
### Author:  [@Jacob\_Turner](https://community.cambiumnetworks.com/u/Jacob_Turner)
#### Post date: [December 20, 2024, 11:35pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/22 "2024-12-20T23:35:32Z")
Please describe the network configuration for the management side of the radios. I have a suspicion.
---
### Author:  [@aka](https://community.cambiumnetworks.com/u/aka)
#### Post date: [December 23, 2024, 1:35pm UTC](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770/23 "2024-12-23T13:35:49Z")
Hello @SBBinc,
could you PM me your support ticket number?
[Next page](https://community.cambiumnetworks.com/t/epmp-software-release-5-9-1-is-now-available/102770.md?page=2)