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| Thread ID: 69230 | 2006-05-26 06:05:00 | using lan kills internet | heni72847 (1166) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 457919 | 2006-05-28 01:32:00 | If you have two pairs of partners with one common partner, both pairs oing transfers as fast as they can, there will be collisions. You can't say "not to that extent". The extent depends on how busy the one line from the switch to the common host is. There might be a lot. The independent router will have a log. If you can't find that, start a separate session on Ubuntu, and run Etherreal. That will tell you what's going on. | Graham L (2) | ||
| 457920 | 2006-05-28 03:41:00 | If you have two pairs of partners with one common partner, both pairs oing transfers as fast as they can, there will be collisions. You can't say "not to that extent". The extent depends on how busy the one line from the switch to the common host is. There might be a lot. The independent router will have a log. If you can't find that, start a separate session on Ubuntu, and run Etherreal. That will tell you what's going on. You seem to be referring to a hub. According to the description on the DSE site, that thing does incorporate a switch. And a switch has independent wiring for each port - i.e., each port is a collision domain, not the whole switch. As the OP writes that both machines are using their own ports on the switch, collisions should not really be apparent. You cannot use a packet sniffer such as Ethernet because you cannot see all ports on a switch. Anyway, a packet sniffer can only see what is flowing, and cannot tell you why it is slow etc. I have a router with a switch, I transfer a large amount of data between a laptop and a server whilst surfing, and I do not notice any significant slowdown. There is something wrong with the OP's setup. Just a thought - are you using Samba to access the Kubuntu machine from XP? |
vinref (6194) | ||
| 457921 | 2006-05-28 04:38:00 | yes i'm using samba | heni72847 (1166) | ||
| 457922 | 2006-05-28 04:58:00 | Vinref, it doesn't matter whether you've got a switch or a hub . The computer on which the problem ("U") is happening has one NIC, connected to the switch . It is receiving, or sending, data from two other devices, "ADSL" and "XP") . The switch can set up a link from U-ADSL, and another from U to XP . But you'll get collisions at U's NIC if it's communicating to both of them at the same time . How can they be avoided? DSE can't stop that . A switch can prevent collisions in independent connections . It can't prevent collisions if one port is involved in multiple connections . |
Graham L (2) | ||
| 457923 | 2006-05-28 05:23:00 | Vinref, it doesn't matter whether you've got a switch or a hub . The computer on which the problem ("U") is happening has one NIC, connected to the switch . It is receiving, or sending, data from two other devices, "ADSL" and "XP") . The switch can set up a link from U-ADSL, and another from U to XP . But you'll get collisions at U's NIC if it's communicating to both of them at the same time . Maybe you should look up the definition of a switch . Try Wikipedia . The internet connection is functionally just another port . I . e . , the switch should just treat it as just another "machine" connected to it at another port . The switch will resolve all collisions because there are 3 independent domains . As for collisions at the NIC on the Kubuntu machine - it is supposed to be a duplex card anyways . At a max throughput of 100Mbps, you cannot be saturating the connection to affect your web access . How can they be avoided? DSE can't stop that . A switch can prevent collisions in independent connections . It can't prevent collisions if one port is involved in multiple connections . You are confused . See the above . I, and many many happy people out there, seem to have a similar set-up but not the same problem . To heni - there is something wrong with your set-up . Keep looking for the answer . It is certainly not insoluble . And seeing as you are using Samba, you'd better check that too . Lots of google results when I just checked . |
vinref (6194) | ||
| 457924 | 2006-05-28 10:56:00 | i might set up http or ftp server if i have time and try transfering files through those and see what happens.. took a while to get my samba working at the current speed..don't wanna change anything |
heni72847 (1166) | ||
| 457925 | 2006-05-29 04:26:00 | Vinref. I am not confused. I was referring to a switch, though it's bloody irrelevant. **** wikipedia. I know what a switch is. I know what a hub is. I even know what a DEMPR is. I know the internet connection is just treated as another port. It is just another port. I bloody well said that. I said that since the transmissions to/from two switch ports are BOTH going through the SAME port which is the ONLY port on the switch connected to the ONLY NIC on the Ubuntu computer, collisions are inevitable. The Ubuntu's NIC is part of two "collision domains". Ethereal run on the Ubuntu machine will show collisions on that machine's NIC. It doesn't have to see any other ports to do that. If it can't see the traffic on the NIC on its own machine there's a realproblem. ... I, and many many happy people out there, seem to have a similar set-up but not the same problem That's the beauty of computer problems. I find it's best to not assume that it's "impossible" for something to happen in realtime systems. Many people have been surprised at just how often the "impossible" happens. |
Graham L (2) | ||
| 457926 | 2006-05-29 13:29:00 | Vinref . I am not confused . You are absolutely confused . You cannot see the significance of a switch . Please look it up - if you have something against wikipedia, google for another source . I was referring to a switch, though it's bloody irrelevant . Then you are in the wrong thread . **** wikipedia . I know what a switch is . I know what a hub is . I even know what a DEMPR is . I know the internet connection is just treated as another port . It is just another port . I bloody well said that . No you did not say that . Show me where . I said that since the transmissions to/from two switch ports are BOTH going through the SAME port which is the ONLY port on the switch connected to the ONLY NIC on the Ubuntu computer, collisions are inevitable . The Ubuntu's NIC is part of two "collision domains" . There is no collision at the switch because it is resolved by the switches OS . High traffic may slow down the OS, but these are not "collisions" . There is no collision at the Kubuntu NIC because is is a duplex card, and is talking to the switch using TCP/IP . Understand? Ethereal run on the Ubuntu machine will show collisions on that machine's NIC . It doesn't have to see any other ports to do that . If it can't see the traffic on the NIC on its own machine there's a realproblem . You have never used Ethereal have you? It cannot detect collisions . It is impossible . Read man ethereal and show me where it says it can detect collisions . Preposterous statement . Gaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhh! |
vinref (6194) | ||
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