From: Adam M. <mcl...@gm...> - 2006-11-18 16:25:28
|
Hi, So I'm putting four Gumstix and a PC together on a small switch. The PC plus one netCF/STUART card is stable. The PC plus two netCF/STUARTs is stable, as far as I can tell. At three netCF/STUARTs, the network last perhaps 4 minutes before all the eth0 interfaces on the 400XMs go down, and then come back up, and then continue to oscillate. When all four copies are running, the network persists for perhaps a minute. I'm trying to figure out if this is the switch, or the netCFs that causes the problem. I have 4V power supplies for each netCF/STUART combo, and I've tried powering them via the STAURT board and the netCF board with no difference in regards to the problem. The switch vendor doubts it is the switch's fault, and my thinking is that the 4V supplies might not be able to power the whole three-card system. Any ideas as to what it could be? Thanks. |
From: Alexandre P. N. <al...@om...> - 2006-11-18 16:44:56
|
Adam McLeod escreveu: >Hi, > > So I'm putting four Gumstix and a PC together on a small switch. >The PC plus one netCF/STUART card is stable. The PC plus two >netCF/STUARTs is stable, as far as I can tell. At three >netCF/STUARTs, the network last perhaps 4 minutes before all the eth0 >interfaces on the 400XMs go down, and then come back up, and then >continue to oscillate. When all four copies are running, the network >persists for perhaps a minute. I'm trying to figure out if this is >the switch, or the netCFs that causes the problem. I have 4V power >supplies for each netCF/STUART combo, and I've tried powering them via >the STAURT board and the netCF board with no difference in regards to >the problem. > >The switch vendor doubts it is the switch's fault, and my thinking is >that the 4V supplies might not be able to power the whole three-card >system. Any ideas as to what it could be? > >Thanks. > > If I understood your setup correctly, you're using individual power supplies to each board, so I don't see where it could make any difference for each supply/stix combination to have any number of connections through the switch. As for the power supply expecs, it's not the voltage that matters. 4v is the recommended for any ethernet card for the gumstix, because more than that make the ethernet chip gets really warm. What's important is the current the power supply is able to deliver, in other words, how many miniamperes it was designed to sustain on load. If you're using the supplies sold with gumstix you should be fine. The symptoms you describe aren't exactly usual. If the supplies are indeed individual, the only common link (and therefore the probable SPF [single point of failure]) between then is the switch, but that doesn't take away other possibilities. - Alexandre |
From: Tim N. <ce...@gm...> - 2006-11-18 18:01:54
|
Do they all have unique mac and ip addresses? --Tim |
From: Adam M. <mcl...@gm...> - 2006-11-18 21:38:01
|
As for the 4v supplies, I couldn't find documentation on what voltage the cards want, or really which regulators are equipped to handle load from where. I was afraid that perhaps the regulators attached to the STUART cards couldn't supply enough current for a Gumstix plus a netCF, or vice versa. I know there are issueslike this with the Robostix. As for IP/MAC conflicts, I haven't checked the MAC addresses (I will now) but I did ensure that there are no IP conflicts. The PC and netCFs are ordered 10.0.0.1-2-3-4 and 5. Adam On 11/18/06, Tim Newsom <ce...@gm...> wrote: > Do they all have unique mac and ip addresses? > --Tim > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Don A. <do...@gu...> - 2006-11-18 23:35:48
|
At 4:38 PM -0500 11/18/06, Adam McLeod wrote: >As for the 4v supplies, I couldn't find documentation on what voltage >the cards want, or really which regulators are equipped to handle load >from where. I was afraid that perhaps the regulators attached to the >STUART cards couldn't supply enough current for a Gumstix plus a >netCF, or vice versa. I know there are issueslike this with the >Robostix. > Hi Adam Use a 5v wall adapter for any gumstix configuration that involves a Robostix or Roboaudiostix expansion board. Plug the power supply into the power input jack on the robotics board directly. Use a 4v wall adapter for any gumstix configuration not involving a robotics board. Plug the power supply into the power input jack on any of the boards in the configuration. as per this FAQ: http://docwiki.gumstix.org/Frequently_asked_questions/Heat_and_power#When_should_a_4v_power_supply_be_used.3F_When_should_the_5v_supply_be_used.3F Don/ ==================================================================== Don Anderson http://www.gumstix.com ==================================================================== -- |
From: Dave H. <dhy...@gm...> - 2006-11-19 03:06:04
|
Hi Adam, > As for IP/MAC conflicts, I haven't checked the MAC addresses (I will > now) but I did ensure that there are no IP conflicts. The PC and > netCFs are ordered 10.0.0.1-2-3-4 and 5. You really need to check the MAC addresses. When you have the problem, does unplugging any of the gumstix cause the problem to go away? Or is unplugging only one specific one cause the problem to go away. I don't see any isolation transformers on the network connectors. Does anybody know if theses are in the connector? -- Dave Hylands Vancouver, BC, Canada http://www.DaveHylands.com/ |
From: Adam M. <mcl...@gm...> - 2006-11-19 13:38:42
|
I haven't really sat down and waiting for every combination of netCF's to fail, but at this point it seems rather stochastic and a function only of the number of netCFs, not any particular one. I also didn't leave two netCFs plugged in overnight, so it may just take them a long, long time to fail. Our current setup with a single Gumstix is working beautifully in our UAV, by the way, though we need a way to wrench more I/O out of the system. This is why we're networking four Gumstix together, since it buys us 12 UARTs for relatively little space/weight/power, and we get 4x processing power to boot. Thanks, Adam On 11/18/06, Dave Hylands <dhy...@gm...> wrote: > Hi Adam, > > > As for IP/MAC conflicts, I haven't checked the MAC addresses (I will > > now) but I did ensure that there are no IP conflicts. The PC and > > netCFs are ordered 10.0.0.1-2-3-4 and 5. > > You really need to check the MAC addresses. When you have the problem, > does unplugging any of the gumstix cause the problem to go away? Or is > unplugging only one specific one cause the problem to go away. > > I don't see any isolation transformers on the network connectors. Does > anybody know if theses are in the connector? > > -- > Dave Hylands > Vancouver, BC, Canada > http://www.DaveHylands.com/ > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > gumstix-users mailing list > gum...@li... > https://lists.sourceforge.net/lists/listinfo/gumstix-users > |
From: Adam M. <mcl...@gm...> - 2006-11-20 18:03:07
|
No MAC address conflicts. I think the problem is with the switch I'm using; I changed it out for hub of a different manufacture, and it all seems stable now. On 11/19/06, Adam McLeod <mcl...@gm...> wrote: > I haven't really sat down and waiting for every combination of netCF's > to fail, but at this point it seems rather stochastic and a function > only of the number of netCFs, not any particular one. I also didn't > leave two netCFs plugged in overnight, so it may just take them a > long, long time to fail. > > Our current setup with a single Gumstix is working beautifully in our > UAV, by the way, though we need a way to wrench more I/O out of the > system. This is why we're networking four Gumstix together, since it > buys us 12 UARTs for relatively little space/weight/power, and we get > 4x processing power to boot. > > Thanks, > > Adam > > On 11/18/06, Dave Hylands <dhy...@gm...> wrote: > > Hi Adam, > > > > > As for IP/MAC conflicts, I haven't checked the MAC addresses (I will > > > now) but I did ensure that there are no IP conflicts. The PC and > > > netCFs are ordered 10.0.0.1-2-3-4 and 5. > > > > You really need to check the MAC addresses. When you have the problem, > > does unplugging any of the gumstix cause the problem to go away? Or is > > unplugging only one specific one cause the problem to go away. > > > > I don't see any isolation transformers on the network connectors. Does > > anybody know if theses are in the connector? > > > > -- > > Dave Hylands > > Vancouver, BC, Canada > > http://www.DaveHylands.com/ > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share your > > opinions on IT & business topics through brief surveys - and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > > gumstix-users mailing list > > gum...@li... > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > |
From: Adam M. <mcl...@gm...> - 2006-11-20 19:02:22
|
Solved it. The regulator was entering thermal shutdown. I bolted it to a big chunk of aluminum and it's all stable now. On 11/20/06, Adam McLeod <mcl...@gm...> wrote: > No MAC address conflicts. I think the problem is with the switch I'm > using; I changed it out for hub of a different manufacture, and it all > seems stable now. > > > > On 11/19/06, Adam McLeod <mcl...@gm...> wrote: > > I haven't really sat down and waiting for every combination of netCF's > > to fail, but at this point it seems rather stochastic and a function > > only of the number of netCFs, not any particular one. I also didn't > > leave two netCFs plugged in overnight, so it may just take them a > > long, long time to fail. > > > > Our current setup with a single Gumstix is working beautifully in our > > UAV, by the way, though we need a way to wrench more I/O out of the > > system. This is why we're networking four Gumstix together, since it > > buys us 12 UARTs for relatively little space/weight/power, and we get > > 4x processing power to boot. > > > > Thanks, > > > > Adam > > > > On 11/18/06, Dave Hylands <dhy...@gm...> wrote: > > > Hi Adam, > > > > > > > As for IP/MAC conflicts, I haven't checked the MAC addresses (I will > > > > now) but I did ensure that there are no IP conflicts. The PC and > > > > netCFs are ordered 10.0.0.1-2-3-4 and 5. > > > > > > You really need to check the MAC addresses. When you have the problem, > > > does unplugging any of the gumstix cause the problem to go away? Or is > > > unplugging only one specific one cause the problem to go away. > > > > > > I don't see any isolation transformers on the network connectors. Does > > > anybody know if theses are in the connector? > > > > > > -- > > > Dave Hylands > > > Vancouver, BC, Canada > > > http://www.DaveHylands.com/ > > > > > > ------------------------------------------------------------------------- > > > Take Surveys. Earn Cash. Influence the Future of IT > > > Join SourceForge.net's Techsay panel and you'll get the chance to share your > > > opinions on IT & business topics through brief surveys - and earn cash > > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > > _______________________________________________ > > > gumstix-users mailing list > > > gum...@li... > > > https://lists.sourceforge.net/lists/listinfo/gumstix-users > > > > > > |