We had a 3com router that sometimes refused to pass traffic for no reason we could ever determine. But, all we had to do to get it working again was to unplug one of the interfaces and let the electrons drain out for 30 seconds or so, then plug it back it. The network was back to normal for sometimes months before it would happen again.
Then we replaced the router with their brand-new CoreBuilder 3500 switch. Then, two weeks later they abandoned the enterprise switch market and left us high and dry. Since then, 3com has had a big place in our network plans: the trash can. From: Erik Goldoff [mailto:[email protected]] Sent: Wednesday, September 22, 2010 3:17 PM To: NT System Admin Issues Subject: RE: My whole network went down! Well, by on do you mean on solid, like broadcast storm or locked up ? That's more what I was getting at, I saw that on a 3Com 36 port switch a few years back, whole switch just locked up, thought it was Windows and wanted a reboot before it would work again. Erik Goldoff IT Consultant Systems, Networks, & Security ' Security is an ongoing process, not a one time event ! ' From: James Kerr [mailto:[email protected]] Sent: Wednesday, September 22, 2010 4:13 PM To: NT System Admin Issues Subject: Re: My whole network went down! I did, they looked like they were all functioning but I didnt examine them closely, just saw that the lights were on on all of them. ----- Original Message ----- From: Erik Goldoff <mailto:[email protected]> To: NT System Admin Issues <mailto:[email protected]> Sent: Wednesday, September 22, 2010 2:52 PM Subject: RE: My whole network went down! Did you happen to take note of the link light status on the switches before you shut down the UPS ? Erik Goldoff IT Consultant Systems, Networks, & Security ' Security is an ongoing process, not a one time event ! ' From: James Kerr [mailto:[email protected]] Sent: Wednesday, September 22, 2010 2:45 PM To: NT System Admin Issues Subject: My whole network went down! So anyway, we lost all connectivity around noon at our main office. After some various checks on the servers, I try to ping some of them from my workstation and every so often I get a reply but mostly its timing out. I go to our wire closet and shut off the UPS that all our switches are on, bring them back up and low and behold everything is working again. Anyone have any idea what one of these switches was doing to bring the network to its knees? If it happens again I will restart them individually to see which one caused the drama. Network was down for 45 minutes, not happy. James ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
