Try upgrading the subscriber with problems to V3.28 and using the wireless test package. Many of the odd issues we've had with MT and wireless are version related.
On Wed, Sep 16, 2009 at 2:20 AM, Tom Sharples<tsharp...@qorvus.com> wrote: > Maybe just bad hardware at Subscriber B? Last week we had an XR-9 ptp link > in Houston that behaved somewhat similarly, great speed in one direction, > but next to nothing in the other. Shotgunning the radio & motherboard (an > Alix) fixed it. Haven't gotten it back yet so don't know which went bad. > > Tom S. > > ----- Original Message ----- > From: "Tom DeReggi" <wirelessn...@rapiddsl.net> > To: "WISPA General List" <wireless@wispa.org> > Sent: Tuesday, September 15, 2009 5:25 PM > Subject: [WISPA] Mikrotik Problem - 900Mhz-WDS-incremental speed degrade > tpZero then drop- repeat. > > >>I have a problem with Mikrotik I have not been able to solve. Wondering if >> anyone has any insight. >> >> A summary config is.... >> >> I have a 433AH setup as AP with 1 XR900 and 1 R5H (5.8Ghz). The Cat5 >> Ethernet port goes to a SMC VLAN switch, where the SMC tags and untags >> VLAN >> ID, and continues to the Backhaul Radio. My point here is the MT itself >> does >> not have any VLAN configured. >> >> I need everything to act as a True Bridge, so I'm using WDS on everything. >> Both mPCI cards are set up as "AP" and then WDS interfaces configured. >> The R5H sector has one subscriber, so there is one WDS interface created >> for >> that. The XR900 has two subscriber points. So there are two WDS >> interfaces >> set up for the XR900 sector, one for each subscriber. So all three WDS >> interaces and the Ethernet (to backhaul) are all bridged togeather under >> one >> Bridge. >> >> SubscriberA has a 433AH also, and actually is a repeater site. So it has >> two >> mPCI each configured for WDS, and then the WDS ports bridged togeather. >> The >> primary mPCI that connects to the above first AP, is set for WDS Slave. >> This subscriberA (repeater radio) works normally. I can run MT bandwdith >> test continually at consistent speed. >> >> As well, the subscriber for the R5H sector above also is set up for WDS >> Salve, and works properly, and tests consistently with Bandwdith test. >> >> SubscriberB for 900Mhz sector is the problem. It is a RB411 w/ a 24V-1A >> PS, >> w/ XR900. Originally it was set for WDS Slave also. It is now set for WDS >> Station, and performs the same as if WDS Slave. When running MT Bandwdith >> test both UDP or TCP, Sitting at the 433AH AP's winbox, I get the >> following >> results.... TXing it works perfectly and consistently. >> But if doing a receive test.... It starts out at about 800 kbps, then >> slowly >> reduces speed incrementally, down to 500 kbps, to 300kbps, to 100kbps, >> etc, >> down to Zero. When it reaches Zero mbps, the radio link disconnects, and >> immediately restarts itself. Speed starts back up at 800 kbps or so, and >> the >> same thing repeats. If doing Bi-directional tests of course the same thing >> applies, because it receives also. >> >> Noise is low at teh SU, about -67, and -74 at AP. At first I thought it >> was >> noise at the IP, because occastionally SNR gets very low. .But.... >> SubscriberA has a lower signal at -84 and does not experience the same >> problem. Just for grins, I tried playing around with TRansmit power at >> the >> SubscriberB, but that had no positive effect. As well, as a test, I >> disabled the second WDS interface to SubscriberA, and no change. >> >> To be clear... SubscriberA and SubscriberB each have their own WDS >> interface >> configured on WLAN1 of the 433AH AP. >> I am using embedded MTOS V 3.10 on each. >> >> What is causing this problem? Why is speed received from my SubscriberB >> incrementally degrading and breaking link? >> >> Bridge loops? Is my config valid? RB411 Bug? >> >> Tom DeReggi >> RapidDSL & Wireless, Inc >> IntAirNet- Fixed Wireless Broadband >> >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
