Dennis, In large installations, I've always found it helpful when diagnosing LAN issues to isolate floors and departments first - using routers or with devices that can do transparent bridging. That way, you can walk through each dept/floor testing for the issues, and hopefully find only one location its still affecting. Its entirely likely that there's either a loop of some sort or a switch has gone off the deep end. If you'd like, let him know if he wants to drop me a mail, I can walk through details about the situation and hopefully help him narrow it down. ------Original Message------ From: Dennis Dayman To: nanog@nanog.org Subject: Latency quesstion Sent: Mar 18, 2010 7:56 AM have a friend who has 21 floors of a building in DFW, multiple switches, etc and they started to have latency issues this weekend where half if not all packet are being dropped to folder shares, printers, etc. Suggestions on how they can troubleshoot that? call in a company to help identify it? -Dennis -- Brielle Bruns http://www.sosdg.org / http://www.ahbl.org
Dennis, You have a massive spanning tree issue....just kidding....check for that though.... Please update us more on your situation and if the other suggestions on the list helped. Or we can communicate privately, I love troubleshooting situations like this....
To: nanog@nanog.org Subject: Re: Latency quesstion From: bruns@2mbit.com Date: Thu, 18 Mar 2010 15:12:59 +0000
Dennis,
In large installations, I've always found it helpful when diagnosing LAN issues to isolate floors and departments first - using routers or with devices that can do transparent bridging. That way, you can walk through each dept/floor testing for the issues, and hopefully find only one location its still affecting.
Its entirely likely that there's either a loop of some sort or a switch has gone off the deep end.
If you'd like, let him know if he wants to drop me a mail, I can walk through details about the situation and hopefully help him narrow it down. ------Original Message------ From: Dennis Dayman To: nanog@nanog.org Subject: Latency quesstion Sent: Mar 18, 2010 7:56 AM
have a friend who has 21 floors of a building in DFW, multiple switches, etc and they started to have latency issues this weekend where half if not all packet are being dropped to folder shares, printers, etc. Suggestions on how they can troubleshoot that? call in a company to help identify it?
-Dennis
-- Brielle Bruns http://www.sosdg.org / http://www.ahbl.org
Its also possible there are STP issues, so check where you roots are for the vlans and make sure they are deterministically set. Brian On Mar 18, 2010, at 11:12 AM, Brielle Bruns wrote:
Dennis,
In large installations, I've always found it helpful when diagnosing LAN issues to isolate floors and departments first - using routers or with devices that can do transparent bridging. That way, you can walk through each dept/floor testing for the issues, and hopefully find only one location its still affecting.
Its entirely likely that there's either a loop of some sort or a switch has gone off the deep end.
If you'd like, let him know if he wants to drop me a mail, I can walk through details about the situation and hopefully help him narrow it down. ------Original Message------ From: Dennis Dayman To: nanog@nanog.org Subject: Latency quesstion Sent: Mar 18, 2010 7:56 AM
have a friend who has 21 floors of a building in DFW, multiple switches, etc and they started to have latency issues this weekend where half if not all packet are being dropped to folder shares, printers, etc. Suggestions on how they can troubleshoot that? call in a company to help identify it?
-Dennis
-- Brielle Bruns http://www.sosdg.org / http://www.ahbl.org
participants (3)
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Brandon Kim -
Brian Feeny -
Brielle Bruns