Thu Aug 24, 2006 7:23 pm
I'm sorry, I just noticed that I did not report my latest findings regarding "The Dude" and Tranzeo testing I've done.
I can intentionally crash Tranzeo radios on my network of thirty towers with "The Dude". I can repeat this process with success everytime. The Dude does crash Tranzeo radios.
The symptoms are as follows. Set "The Dude" to do the most complete and comprensive scan possible. Using the dudes most intense settings set the scans to begin probing the network and then monitor (through ping) a Tranzeo 5.8GHz radio.
The progression of packet loss slowly increases the longer that "The Dude" runs. At first the system will seem normal. Within a few minutes you'll notice that the Tranzeo packloss will begin. Gradually it becomes so bad that only a few (ICMP) packets get through. Meanwhile Internet traffic through the radio may still work although it is slow. Finally the pings become so bad that the Tranzeo radio loses http access. If this happens, it is likely that you will have to take a trip out to your tower to "hard" reboot the radio. If you can catch it soon enough and reboot using http access you've bought yourself more time, but if The Dude is left to run and the radio is not monitored, it will eventually lock up. I have found myself "camped out" at my computer over night in order to reboot the radio every few minutes while I figured out what was crashing the Tranzeos. The whole process from start of the dude to crashing a Tranzeo radio takes about 40 minutes. I've had it last as long as 3 hours when testing during low traffic time such as the middle of the night.
As I reported above, there are other things that can crash the Tranzeo radio's (virus/spyware), and as reported to me by the Tranzeo tech support people, high flow of UDP packets can cause them to crash. I suspect that in the course of doing what it does, The Dude is providing just the right combination of UDP packets with high traffic flow will and does set off this unfortunate situation.
I am going to test further the needed combination of The Dude and Tranzeo radios to see if there is a compromise that I can make to the Dude's settings that place less stress on the Tranzeo radios and yield enough results to be a practical network monitor for Tranzeo users.
I'll report those findings here. If you are a WISP and want to share information, war stories or need engineering services related to WISPing let me know.