Can there be an Ethernet Switch that doesn't work with Linux???
While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. I have a typical home network. In one room, I have several computers, so I want to use an additional switch there. I got an EDIMAX ES-3208P 100 Mbps switch (90 shekels, at Bug). Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! When I replace the switch with a 10-year-old hub I had lying around (good thing I didn't toss that museum piece), suddenly everything works! I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? Thanks for any ideas, Nadav. -- Nadav Har'El|Sunday, Aug 29 2010, 19 Elul 5770 n...@math.technion.ac.il |- Phone +972-523-790466, ICQ 13349191 |I don't eat snails. I prefer fast food. http://nadav.harel.org.il | ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
On Sun, 2010-08-29 at 00:27 +0300, Nadav Har'El wrote: Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! [... snipped ...] I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? Do the replies to the DHCP and ARP broadcasts of the MS-Windows computer get forwarded to it by the switch? If yes, are they formatted any differently from those of the Linux machine? --- Omer -- What happens if one mixes together evolution with time travel to the past? See: http://www.zak.co.il/a/stuff/opinions/eng/evol_tm.html My own blog is at http://www.zak.co.il/tddpirate/ My opinions, as expressed in this E-mail message, are mine alone. They do not represent the official policy of any organization with which I may be affiliated in any way. WARNING TO SPAMMERS: at http://www.zak.co.il/spamwarning.html ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
On Sun, Aug 29, 2010 at 12:27 AM, Nadav Har'El n...@math.technion.ac.ilwrote: While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. I have a typical home network. In one room, I have several computers, so I want to use an additional switch there. I got an EDIMAX ES-3208P 100 Mbps switch (90 shekels, at Bug). Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! When I replace the switch with a 10-year-old hub I had lying around (good thing I didn't toss that museum piece), suddenly everything works! I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? What I am about to say is so far fetched, but having seen bizarre things on networking, I would suggest it anyways :) You didn't mention what was before this Edimax switch? The old Hub? It could be that there's an Ethernet negotiation problem, in such a way that your MAC doesn't get registered on the switch (?). Not necessarily a Linux problem. Maybe a NIC problem, or an Ethernet cable problem. Of course that with a Hub that would work anyways, because a Hub broadcasts to all ports, regardless of negotiation... So, did you try a different NIC? -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
On Aug 29, 2010, at 12:27 AM, Nadav Har'El wrote: While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. My guess is that it's an autonegotation speed and or duplex problem. Try setting the speed to 10mbit and the duplex to half. Make sure the cables are correct, not crossover cables. The switch accomodates autosensing and will work with either, but the computer may not. If that works, try setting it 100mbps and half duplex, if that works try full duplex. If it works at 10 and not 100, it's probably bad cables. 10 year old switches generally did not support autosensing of cable type, full duplex and many of them were only 10mbit. Geoff. -- Geoffrey S. Mendelson, N3OWJ/4X1GM To help restaurants, as part of the stimulus package, everyone must order dessert. As part of the socialized health plan, you are forbidden to eat it. :-) ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
On Aug 29, 2010, at 1:06 AM, shimi wrote: It could be that there's an Ethernet negotiation problem, in such a way that your MAC doesn't get registered on the switch (?). Not necessarily a Linux problem. Maybe a NIC problem, or an Ethernet cable problem. Of course that with a Hub that would work anyways, because a Hub broadcasts to all ports, regardless of negotiation... That's why I keep some RTL8139 cards around. They work with just about every operating system (not only Intel and not only DOS/Windows/Linux). Geoff. -- Geoffrey S. Mendelson, N3OWJ/4X1GM To help restaurants, as part of the stimulus package, everyone must order dessert. As part of the socialized health plan, you are forbidden to eat it. :-) ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
Ah, you had those issues too.. I had them with their Wifi N crap, and had issues with Linux with this router. Long story short - return it and take anything else. Hetz 2010/8/29 Nadav Har'El n...@math.technion.ac.il While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. I have a typical home network. In one room, I have several computers, so I want to use an additional switch there. I got an EDIMAX ES-3208P 100 Mbps switch (90 shekels, at Bug). Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! When I replace the switch with a 10-year-old hub I had lying around (good thing I didn't toss that museum piece), suddenly everything works! I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? Thanks for any ideas, Nadav. -- Nadav Har'El|Sunday, Aug 29 2010, 19 Elul 5770 n...@math.technion.ac.il |- Phone +972-523-790466, ICQ 13349191 |I don't eat snails. I prefer fast food. http://nadav.harel.org.il | ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il -- my blog (hebrew): http://benhamo.org Skype: heunique MSN: hetz-b...@benhamo.org ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
Have you tested all switch ports with both computers? I had a netgear adsl modem/router/wifi which had its ether ports gradually go out after almost a year of perfect operations. I had it replaced under warranty. On 29/08/2010 7:33 AM, Nadav Harapos;El n...@math.technion.ac.il wrote: While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. I have a typical home network. In one room, I have several computers, so I want to use an additional switch there. I got an EDIMAX ES-3208P 100 Mbps switch (90 shekels, at Bug). Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! When I replace the switch with a 10-year-old hub I had lying around (good thing I didn't toss that museum piece), suddenly everything works! I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? Thanks for any ideas, Nadav. -- Nadav Har'El|Sunday, Aug 29 2010, 19 Elul 5770 n...@math.technion.ac.il |- Phone +972-523-790466, ICQ 13349191 |I don't eat snails. I prefer fast food. http://nadav.harel.org.il | ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
OT - self publishing, a review of the Iranian Holocaust Cartoons
Here is a good example of using open source in self publishing, a review I wrote on my site, analyzing the Iranian anti-Semitic Holocaust cartoon web site: - Screen captures were taken on an Ubuntu desktop, using gnome-screenshot --interactive - Captures were mass-cropped using image-magick convert utility (thanks FLUX members for the script and advice) - The page is presented using PmWiki, an open source PHP application. The server runs LAMP, using hardware that is over 12 years old. None of the software involved cost a single cent. In case anyone is interested, here is a link to my review of the site's content. I did not capture the music or the flash, but what I have is better. http://www.words2u.net/pmwiki/?n=Opinion.HolocaustCartoons Z. P.S. If you have any comments on the page, feel free to email them. If you feel others will benefit from the content, direct them to the page (the site is not commercial, though there are google ads in the template I use) -- Check out my web site - www.words2u.net ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Can there be an Ethernet Switch that doesn't work with Linux???
Hi, To make sure its not hardware related, I would try to boot both windows and linux computers from your favorite live CD. I think its less hassle than changing cards/cables. Alon. On 8/29/2010 12:27 AM, Nadav Har'El wrote: While I have quite a bit of networking experience, I have found myself stumped by a frustrating problem in my home network - which surprisingly appears Linux-specific - and I wonder if anyone ever saw such a thing. I have a typical home network. In one room, I have several computers, so I want to use an additional switch there. I got an EDIMAX ES-3208P 100 Mbps switch (90 shekels, at Bug). Now, what happens is that while my wife's Windows computer works well with that switch, my Linux computer does not. Sniffing the network, I see that my Linux computer sends out DHCP broadcasts (to get an IP address from the house's DHCP server) or ARP broadcasts (to contact the gateway), but while replies for these queries are being generated, they are not forwarded by the switch to my Linux computer! When I replace the switch with a 10-year-old hub I had lying around (good thing I didn't toss that museum piece), suddenly everything works! I could have concluded that that EDIMAX switch is simply broken, if it weren't for the fact the Windows computer works perfectly behind it! What could possibly be the cause for the Windows computer to connect correctly behind the switch, while the Linux computer doesn't? Has anyone ever seen such a problem? Thanks for any ideas, Nadav. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
