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MyThoughts
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hw-retries for wireless

Tue Aug 14, 2007 4:38 pm

RouterOS v2.9.45 implemented a new hw-retries setting for wireless cards, but I cannot find a status on how many have actually occured. I believe it would be of use to be able to see a total number of hw-retries, and/or the number of hw-retries that the last trasmission required.
Is there a way to view this info in either Winbox or console, or is this not possible in RouterOS?

Cheers
 
leonj
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Re: hw-retries for wireless

Wed Nov 28, 2007 10:58 am

Hi,

Maybe looking at a specific entry in the access-list, then under 'statistics' you could get some sort of idea on the amount of tx-frames compared to hw-tx-frames and get some sort of idea on the amount of retires.
 
0ldman
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Re: hw-retries for wireless

Wed Nov 28, 2007 6:15 pm

I haven't done much research on this, however someone recommended 7 retries after he randomly picked it. I've done the same, ccq has gone from 40% to 70% by that change alone. Even on good links where the ccq is 80-90%, it will nearly peg it at 99%.
 
R1CH
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Re: hw-retries for wireless

Wed Nov 28, 2007 10:17 pm

Isn't the default 15, which is the highest? I don't see how lowering it would improve quality, unless it counts failed transmissions as "successful" after reaching hw-retries.
 
jcremin
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Re: hw-retries for wireless

Thu Nov 29, 2007 1:54 am

Could it be that a poor connection is trying 15 times which is taking away from the timeslots for other connections and by lowering it to 7, the CCQ for everyone else goes up?
 
0ldman
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Re: hw-retries for wireless

Tue Dec 11, 2007 9:20 am

My shot was point to point, no other clients. Made a big difference. When I had interference, the pings were erratic, 6ms, 150ms, 14ms, 600ms, 65ms, 6ms, etc...
Afterwards, ping never went over 200ms unless I was seriously hammering on the link during interference.
 
jcremin
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Re: hw-retries for wireless

Wed Dec 12, 2007 7:49 am

Is this a setting that only needs to be set on the AP or should it be set on clients as well?
 
0ldman
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Re: hw-retries for wireless

Tue Dec 18, 2007 9:02 am

When I set it on the client side (my side, I could get to it if something went wrong), ccq went up on the rx side of the ap. When I did both, the difference was signifigant.
 
jcremin
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Re: hw-retries for wireless

Tue Dec 18, 2007 10:13 am

Hmm, what about for non-mikrotik clients. Like a laptop connecting or something running DD-WRT. I have a number of these devices on my network and I am wondering if there is anyway to apply the settings to them.
 
0ldman
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Re: hw-retries for wireless

Wed Dec 19, 2007 9:55 am

From what I've read on the forum, take it or leave it, standard 802.11g is 7 retries. MT uses 15 by default. Dunno why yet.
 
Gerard
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Re: hw-retries for wireless

Wed Dec 19, 2007 5:42 pm

When installing a new wireless card on 3.0rc13 it sets the hw-retries to 4 by default. 15 only seems to be set when upgrading from an older version..

-Gerard