From my perspective, the only time I would fix a rate would be to prevent
-----Original Message----- From: Public [mailto:public-bounces@talk.mikrotik.com.au] On Behalf Of Paul Julian Sent: Wednesday, 31 May 2017 4:14 PM To: public@talk.mikrotik.com.au Subject: [MT-AU Public] Locking Wireless Data Rates
Hi All, I'm just wondering what people consider as best practice when working with wireless signals that fluctuate a little and associated fluctuations in data rates. I don't think I have ever really seen a typical data rate that doesn't fluctuate somewhat, but I am interested to know whether most people monitor sync speed and then lock the maximum sync speed by using the supported data rates option.
For example if you have a connection which is jumping around between 130M and 144M would you lock it at 130M or just let it move around ? Whichever option you would use why do you choose this option and what are the benefits ?
We have quite a lot of wireless links and traditionally we let them move around as they want, but as we starting do more QOS on our links I am starting to think about pulling them back so they don't fluctuate so that we can be more certain of what actual bandwidth we will get to a site across
Hi! Speaking generally, the reason that a link will drop /down/ rates is when the retry limit is exceeded - i.e. due to some obstruction and/or other competing transmissions. To answer your question, you need to consider the effect of continuing to attempt using the higher data rate against dropping back to what might be a more reliable rate. If the rates are changing a LOT, then running at the higher rate is problematic. Therefore it would make sense to lock it to the LOWER (more reliable) data rate rather than the other way around :-} The effect of changing rates is not necessarily a big deal, as the re-sync will not usually take more than a few hundred ms, so it only becomes a problem if it happens a lot. How much is 'a lot' will usually depend on the situation - several retrains per minute would probably be too much for a busy backhaul link, but perhaps acceptable for a general domestic CPE link. the data rate from jumping UP to a rate that is rarely stable. Cheers! Mike. that
link and use QOS in a better more manageable way.
Thanks Paul _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au