[SuSE Linux] Excessive Network Collisions
Hi Folks, I am experiencing what seems to be excessive packet "collisions" on my 10BaseT network. There are five systems on the LAN and they have a mixture of NIC's. The collisions seem to occur most often when I am installing software or copying/moving large files. I know that some collisions are normal but, there seems to a collision for every packet sent. It really seems to slow things down substantially. Could some one explain what is going on? Thanks for the help! -- D. R. Grindstaff MACROSHAFT Corp. has Performed an Illegal Operation and Will be Shut Down !!!!! Powered by SuSE 5.3 - To get out of this list, please send email to majordomo@suse.com with this text in its body: unsubscribe suse-linux-e
"D. R. Grindstaff" wrote:
Hi Folks,
I am experiencing what seems to be excessive packet "collisions" on my 10BaseT network.
[snip]
-- D. R. Grindstaff
First, to reiterate your point, a certain amount of collisions are okay. In fact, Ethernet wouldn't exist as we know it without collisions. Bill Metcalfe, the inventor of Ethernet, once said, it is claimed, that he wishes he hadn't used the term 'collisions' in the first place :) I don't know if this is true or not but collisions are perfectly normal to an extent. Now, I have a question for you: what do you mean by excessive? You say that "there seems to be a collision for every packet sent" How do you know this? By looking at the "idiot lights" on the hub, as they are known? Have you installed and/or used an ethernet packet sniffer (such as tcpdump) Until you answer those questions, your assertion of excessive collisions wouldn't really hold much water. In general, once the number of collisions approach 100f total traffic, one should start getting concerned. If you don't like collisions, I suggest you buy yourself a switch. Cheers and good luck. -- Frederic Woodbridge Network Janitor Anexis, Inc. (954) 964-2772 - To get out of this list, please send email to majordomo@suse.com with this text in its body: unsubscribe suse-linux-e
D. R, A few months ago I looked into ethernet packet collisions and discovered they are part of a normally operating ethernet. (Forgive me if you know all this. :-) ) On your 5 node ethernet segment, I would expect collisions under load. Can you tell that it is affecting operations? This 'may' help. <A HREF="http://intel.com/training/olc/course/cert/fn2/mod_03/lesson_4/fn20304b.htm"><A HREF="http://intel.com/training/olc/course/cert/fn2/mod_03/lesson_4/fn20304b.htm</A">http://intel.com/training/olc/course/cert/fn2/mod_03/lesson_4/fn20304b.htm</A</A>> It's not great but check it out. Hotbot and yahoo have thousands of hits on 'ethernet and collisions.' Steve. On Tue, 24 Nov 1998, D. R. Grindstaff wrote:
Hi Folks,
I am experiencing what seems to be excessive packet "collisions" on my 10BaseT network. There are five systems on the LAN and they have a mixture of NIC's. The collisions seem to occur most often when I am installing software or copying/moving large files. I know that some collisions are normal but, there seems to a collision for every packet sent. It really seems to slow things down substantially. Could some one explain what is going on? Thanks for the help!
-- D. R. Grindstaff
MACROSHAFT Corp. has Performed an Illegal Operation and Will be Shut Down !!!!!
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- To get out of this list, please send email to majordomo@suse.com with this text in its body: unsubscribe suse-linux-e
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participants (3)
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daleg＠planetc.com -
fred＠shogun.anexis.com -
stevep＠mindspring.com