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lorddredbg

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NetworkPro <*@gmail.com> wrote:

> Hi

>

> On several sites the 2.4GHz access points with just a few clients or

> some with 20 clients, get high ping and timeouts from time to time.

>

> Please suggest a list of actions, one by one, that we can take to fix

> this. Thanks.

>

> On most of the APs we already tried to change freq, change ack, change

> this and that in settings, change cables, pigtails, antennas, remove

> clients that has low signal strengths.

>

>

> Thanks.

>

> P.S. ROS versions are 3.14, 3.19. 3.20 and maybe 2.9.x on some sites.

Hello,

Mostly the high ping times is caused by the clients with bad signal - lot of

retransmits. Try to improve the link quality for those clients and the ping

times should get better.

Also try to monitor at what times the ping times rises - maybe it is because

of the interference from the other wireless links. Also check maybe the

wireless link is full - running at the max speed.

Check if you are not having lot of disconnects.

Regards,

Uldis

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> About your problem - in the log files you can see that there are mac addreses

> that sends frames to the AP even if they are not connected. Also few clients

> disconnects becuase of the extensive data-loss. Try enabling the B rates (i

> see you have disabled). Try to increase the hw-retries size.

> Also check maybe you are running into the hidden-node issue. You can try to

> enable the nstreme or upgrade to latest RouterOS version with wireless-test

> package and try to use RST/CTS option. Here is more info about it:

> http://wiki.mikrotik.com/wiki/Wireless_Development#Frame_protection_support_.28RTS.2FCTS.29

>

>

> Regards,

> Uldis

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Yes, few clients have very bad signal and it is good that you can get normal

ping results with such clients. Try to see how to improve the signal by

aligning the antennas or using better radio at the client location.

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