Multicast support

[astronomy]

https://lh5.googleusercontent.com/-cEpAT...2520PM.png

I read them from Network Monitor as things are happening. I figure it's maybe doubled or something, I wrote whatever that value read in my notes during my problem for consistency, and also because I didn't understand the math well. Sorry for the confusion. This isn't even an iPXE problem, it seems to be me not knowing enough mixed with a little cisco ios headache.

I think I'm onto something now after my afternoon testing. Normally a problem machine is replaced when found, instead I replaced the switch under that bench with anything that wasn't a cisco 2950. Problem gone (for that machine on that bench anyway). I'm removing the remaining cisco switches in the morning and trying this batch again.

https://lh5.googleusercontent.com/-P0Y16.../drop1.png
UPD: at work this morning, replaced the cisco switches. Problem persists. Here's a screencap of my systems this morning, you can see it's maxed out like I want it until some problem rolls along and jams it up (there it goes to 8.1MiB/s until I located that machine and removed it from the network, then back to 234 instantly!). I also noticed if I unplug the bench having the issue and plug it back in it can operate at full speed. I've gone through every setting on the symbol switches, I had stp off, then back on and only enabled on my 2 uplink ports, disabled every other feature the switch has. I think we may be able to just use it like this though if I can reliably just refresh the connection to that bench to get them booted. Booting the dos disks isn't an issue much because the network is only held back for like 10 seconds or so. I might try a different server OS too but I'm feeling pretty lost here. I still don't think it's an ipxe issue or anything like that...