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USB Power Issues? (modified 0 times) DGMage Profile | Email And now, the continuation of our ongoing "IA-1 Firewall" story.... Ok, kernel is happy, boots fine, bring up NAT great, life is good. Except for the fact that I think I'm overloading the USB hub. I've got 2 LinkSys USB100TX adapters plugged in, plus the mouse, boot and everything works fine. I start transfering a large file to a machine inside the NAT domain, and about 6-8 megs into it, going at 100-150kbps (just pulling the 2.4.18 kernel right now), the transfer stalls, and I lose all network connectivity. On the IA-1, the USB hub seems to go dead. No mouse, no ethernet adapters, no nothing. I reboot, it works fine, try the test again, same issue. Tried without the mouse, no luck. Could it be that 2 network adapters is too much for the IA-1? Kyle 03-01-2002 02:21:10

RE:USB Power Issues? (modified 0 times) klunk Profile Probably not a power problem. I am running 4 USB devices (mouse, keyboard, NIC, USB CDROM)and a laptop hard drive and an AMD K6-2+ CPU at 400 MHz from my IA-1 with no problems. The USB power simply comes from the standard 5V rail, and this rail seems to be relatively beefy on the IA-1. klunk 03-01-2002 08:26:31

RE:USB Power Issues? (modified 0 times) DGMage Profile | Email Hrm, could it possibly be ACPI causing it then? Kyle 03-01-2002 10:06:17

RE:USB Power Issues? (modified 0 times) wildwildwes Profile What chipset do the usb adapters use? A couple people have told me that the kaweth driver is buggy and should be avoided. 03-01-2002 11:30:57

RE:USB Power Issues? (modified 0 times) wildwildwes Profile Nevermind, you said it was a usb100tx and I don't think the kawasaki adapters can do 100 megabits. However, Bob Dougherty indicated that just having the driver loaded could mess things up. I don't know if that's your problem though. 03-01-2002 11:42:44

RE:USB Power Issues? (modified 0 times) DGMage Profile | Email I checked through the config file of the kernel I made, I accidently selected OCPI as well as UCPI for the USB hub, which causes conflicting drivers to be loaded. Once I get a new dev environment setup, I'll recompile and post if that's the problem, there's a good chance that's what's causing it, because this is the type of problem that happens when you set two network cards to the same address in Linux.. Kyle 03-01-2002 14:19:33

RE:USB Power Issues? (modified 0 times) DGMage Profile | Email Ok, well, just spent 3 more hours trying to debug this, no luck. I simply cannot figure out why using 2 network adapters would completely turn off the USB hub. I give up. If someone else wants to try it, I'll put up my kernel and config files on ia1hacking.com. 03-01-2002 19:35:56

RE:USB Power Issues? (modified 0 times) DGMage Profile | Email Nothing like finding out a project isn't physically possible. Ok, did a little research. USB 1.0 is only capable of 12mbit bandwidth, shared. Needless to say, with two 100mbit adapters, I was overrunning that by just a little bit. So, though the project would theoretically be possible with 10mbit adapters, it's just not worth it. Apperently USB 2.0 is supposed to work up to 200mbit, but that doesn't do me much good on the IA-1. Ah well, at least I can say I tried, and now I know a LOT about the midori build system. :) Kyle 03-01-2002 19:51:08

10Mbit (modified 0 times) RatBastard Profile Can't you force the NICs into 10Mbit mode? It doesn't seem like the NICs would pull more packets than they, er, than they could. You should be able to get them both to be like 2Mbit, which should be sufficient for a firewall. Try plugging them into a device that is set to be 10Mbit, and then maybe they'll auto-negotiate down or something. Sorry, man. That's a bummer. 03-02-2002 01:34:49

RE:USB Power Issues? (modified 0 times) DGMage Profile | Email Yeah, I was thinking about trying rate limiting with iptables, but this is just really getting to be a silly project anyways. Everything I'd have to strip out of the kernel to make the damn thing anywhere near secure would make the IA-1 unusable for anything else, and a friend is giving me their old 486 to use as a floppywall. I might play with the project some still, but I'm not making it an nessescity like it has been (I had my network out of commision for most of this week thinking I'd get this working). Kyle 03-02-2002 02:20:39

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