I'm hoping one of you can help out as I haven't been dealing with our total control hardware as of late. We have some sites that are running fairly old code on them and we're considering upgrading. At this point we're basically running TCS 3.6 on them. Since the recent outbreak of worms and virus's we've been having issues with our NMC's going unresponsive. I'm not exactly sure what's happening but taking into account what they have been doing to some of our other gear I'm guessing the NMC's are receiving a good number of ICMP packets and probably filling up their memory and then crashing....just a guess.

I'm assuming the majority of people on this list are using more current code and since I haven't seen anyone complaining of the same scenario I'm thinking that somewhere a particular code might have addressed some of these issues we're now seeing.

Can anyone confirm a code revision that addressed anything like this for the NMC's? Also....can anyone tell me what the most current code is that can run on our existing hardware without upgrading the hardware (we might be willing to upgrade memory). Here's basically what we're using: