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NetTraptor
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w60g link stability and erratic rate selections since ROS 6.47

Tue Jul 14, 2020 1:54 am

I have been having stability issues with all my w60g devices since 6.47. The rate selection is erratic and have frequent disconnects. Going back 6.46.5 improves a lot the stability. I had similar issues even on 50m links

I think this completely cocked up the stability.
*) w60g - improved rate selection in low traffic conditions;

Has anyone noticed strange rate selections on links with 90-100 signal quality? Any disconnects?
 
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NetTraptor
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Re: w60g link stability and erratic rate selections since ROS 6.47

Mon Jul 20, 2020 7:15 pm

No? Nothing? None is using them? No strange issues for you?
 
npero
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Re: w60g link stability and erratic rate selections since ROS 6.47

Tue Jul 21, 2020 7:12 am

I using on two links it is seems to me less stable links, before I don't have disconnection for weeks after update to 6.47.1 have every 24-48h disconnections for one seconds it is not critical but seems to me less stable that has been before.
 
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Re: w60g link stability and erratic rate selections since ROS 6.47

Wed Jul 22, 2020 5:55 pm

we see a lot of disconnects since moving to 6.47 a well. did you try the latest 6.46.x version and its not stable and 6.46.5 is most stable?
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grlmutiajr
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Re: w60g link stability and erratic rate selections since ROS 6.47

Thu Sep 24, 2020 7:47 am

Hi,

We've also noticed some erratic stability issues with the wAP 60G in PTMP setup. The weird thing is that, there's a powerbox behind the wAP 60G station with a tunnel terminating to it. The tunnel never goes down nor the powerbox behind it. We can ping the powerbox even with the station supposedly down.

The radios are currently in the 6.47.2 version and we've turned on the "mdmg-fix" feature which helps in the PTMP negotiation. Does lowering the version down to the stable 6.46.x version helped you? And also, because it's bridged network, did you include the w60G interface to the bridge where the w60G-station interface is?

Thank you. Any insight would help.
 
mazza
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Re: w60g link stability and erratic rate selections since ROS 6.47

Sun Oct 04, 2020 2:11 pm

I installed a new relative short PtP link (about 600m) with two LHG 60G. With the latest stable version (ROS v6.47.4) the Signal, RSSI, and TX Sector are permanently changing. Also the MSC and PHY Rate are changing quite often and the link was dropping multiple times a day. With the highest frequency (64,8GHz) not as often as with the lower frequencies.
I did not have any of this problems with an older comparable link in the same town. On the LHG 60G of this older link the ROS version v6.46.6 was installed. Therefore, I decide to install the latest version from the stable channel (v 6.46.7) on the LHG 60Gs of the new link. However, this did not much improve the situation with the permanently changing w60g state parameters. During searching for an explanation for this unstable behavior, I found this thread. After reading this I downgrade the ROS on both LHG 60G of the new link to v6.46.6. Since the downgrade, about 12 hours ago, the link parameters are perfectly stable.

I come to a similar conclusion as NetTraptor. One of the two w60g related changes from the changelog of 6.46.7 did lead to regression bug.
w60g related changelog entries:
* w60g - added "mdmg-fix" parameter for RBwAP60Gx3 (CLI only);
* w60g - improved rate selection in low traffic conditions;
 
illuminator
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Re: w60g link stability and erratic rate selections since ROS 6.47

Wed Oct 07, 2020 10:56 pm

Hi,

we did run into the same issues here. Some weeks ago (2020-09-21) i updated a wAP60G Link to current firmware. Afterwards i observed a lot of beamforming events (tx-sector jumping all over the place), PHY-Rate/MCS drops and serval short links loss events. Beamforming seems to be more aggressive in the newer releases.
Going back to 6.45.7 solved the issues.

Link Frequency: 60480
Link Length: 140m
Hardware: wAP60G (both sides)

I attached some plots (tx-sector, signal quality and rssi) - might be helpful to hunt down the firmware issue. Firmware downgrade to 6.45.7 was done Wednesday evening (2020-09-23). The first half of the graps shows the problem.
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mmbb
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Re: w60g link stability and erratic rate selections since ROS 6.47

Thu Oct 15, 2020 12:13 am

Hi, I have the same issue on my P2P wAP 60G link with 30m distance. I noticed it yesterday when I upgraded to 6.47.4. The link was unstable and the connection dropped about 100 times during 24 hours. Today I downgraded back to 6.45.7 (as suggested by illuminator, thank you very much) and it's working fine for a few hours. But downgrading shouldn't be the solution. Does anyone have more information what is causing this? I've seen quite a few people complaining about this, but not a single statement from MikroTik that they've acknowledged this issue and are working on a fix.
 
antonsb
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Re: w60g link stability and erratic rate selections since ROS 6.47

Thu Oct 15, 2020 5:29 pm

this is fixed in 6.48beta48, fix will also be merged in next stable release
 
initium
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Re: w60g link stability and erratic rate selections since ROS 6.47

Mon Oct 19, 2020 12:57 pm

Hello. I think what is need to do, if you can on 60GHz setting of power and parameters for the radio because seems that here is on short distance (around 100 meters lot of noise and ranging of the power adjustment to Transmit power to the other side. And majority of issue is when you have 60GHz WAP to W60G . On all tested ROUTEROS version from 6.46 Long term 6.47 stable(what is not stable at all) and Test 6.48 what is lost stable but all have Link dow or link up issues on any distance and more than 100 times per day.
 
vili11
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Re: w60g link stability and erratic rate selections since ROS 6.47

Mon Oct 19, 2020 11:11 pm

I'm seeing the same erratic behaviours on my most recent deployments of LHG60G PTP links running 6.47 and newer. My older ones remain very stable. Rolling back the newer systems to 6.46.7 tonight...
 
vili11
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Re: w60g link stability and erratic rate selections since ROS 6.47

Thu Oct 22, 2020 10:06 pm

Found no improvement on 6.46.7. Trying the new 6.47.6 tonight, and moving one way back to 6.43 (I have some old radios that have been outstandingly reliable on that version).

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