Del, I have noticed this problem (and I run a Cisco AP). It isn't a problem but ht e nature of the beast (maybe). What link quality does your APPO see for the ABTs? What we have noticed is that the ABT's see the towers much better than the Towers see the ABT's. And in actuality, we actually see large re-try counts (no, lowering frag has not helped) and we also believe that the radio's are actually talking at 1 MBps up, and therefore usable bandwidth is much smaller (600kbps?.. ) and with the retries, one customer allowed at 256 can eat-up all that 600 kbps pretty fast...
Btw.. Save me some reading time.. in the rate negotiation, do the systems negotiate well both ways (i.e. Client to AP is as controlling in rate setting as AP to client?) Scott -----Original Message----- From: Del Thompson <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Date: Mon, 20 Oct 2003 13:36:23 -0500 Subject: [smartBridges] one user affecting traffic > Hello all, > I have the following setup: > ISP >> router >> backhaul >> router >> Mikrotic (bandwidth control > unit) >> > APPO >> ABT > > This particular APPO has 30 customers all using the ABT's. > > All customers are bandwidth limited at the tower site by the MiKrotic, > most > customers are 256Kbps down, 128Kbps up. The maximum bandwidth > purchased on > this APPO is 512kbps/512Kbps. > > The problem I've noticed is if a particular customer is doing a > download > that lasts several minutes, every other user on that access point sees > a > severe degradation in service. The other customers on that AP see > download > speeds drop to about 128Kbps and uploads drop to about 64Kbps. In > other > words, they see a decrease to about 1/2 of what they should have. > > We tried setting the RTS threshold on the ABT's to 500 and this had no > noticable effect. (APPO RTS & Fragmentation left as default setting) > Then we lowered the RTS threshold to 256 on all of the ABT's, again, > this > had no noticable effect. > We have not set the fragmentation threshold on any of our radios. > > We started noticing this phenomena when the number of associated radios > on > the APPO reached 20. > > My question is, has anyone else seen this behavior and is there a fix? > > APPO firmware is 1.4j.8, ABT firmware is 0.01.07 > > Thank you in advance for any feedback. > Del > > > > > ----------ANNOUNCEMENT---------- > Don't forget to register for WISPCON IV > http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > Archives: http://archives.part-15.org ----------ANNOUNCEMENT---------- Don't forget to register for WISPCON IV http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org
