Switch port failure on 3548 [7:15089]
Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15089t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Switch port failure on 3548 [7:15089]
The only way I can think that it would be a cable problem is if there was a short in the wire somewhere. Unplug the CAT5 from the suspect port, do a shut/no shut do you get the same result? Better still plug a PC into the port, does it stay up/up? Then plug a PC in another port with an FTP server on it and do some file transfers, then check for errors. MikeM - Original Message - From: Hans Stout To: Sent: Tuesday, August 07, 2001 7:51 AM Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15094t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Switch port failure on 3548 [7:15089]
Mike, thanks for your reply. The problem is that the switch is physically very far away; I just want know if a shut/no shut that is not followed by an up/down of the port inidcates that there is some sort of the problem with the switch port or the cabling. Thanks again in advance for your help. Regards, Hans From: Mike Mandulak To: Hans Stout , [EMAIL PROTECTED] Subject: Re: Switch port failure on 3548 [7:15089] Date: Tue, 07 Aug 2001 07:44:33 -0400 The only way I can think that it would be a cable problem is if there was a short in the wire somewhere. Unplug the CAT5 from the suspect port, do a shut/no shut do you get the same result? Better still plug a PC into the port, does it stay up/up? Then plug a PC in another port with an FTP server on it and do some file transfers, then check for errors. MikeM - Original Message - From: Hans Stout To: Sent: Tuesday, August 07, 2001 7:51 AM Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15098t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Switch port failure on 3548 [7:15089]
Herr Stout, Another easy way of determining if the problem is with the port or the cable would be to plug both ends of the cat 5 cable(s) into a cable tester. The manner Mike proposes is legit but I would want to positively know that all pairs are 100%. Once you certify the cable as being good, then the port would probably be the problem. Hopefully it will be the cable...helluva lot cheaper! -Michael Vaughan Senior Network Engineer Predator-Hunter.com Inc. [EMAIL PROTECTED] -Original Message- From: Mike Mandulak Sent: Tue 8/7/2001 8:52 AM To: [EMAIL PROTECTED] Cc: Subject: Re: Switch port failure on 3548 [7:15089] The only way I can think that it would be a cable problem is if there was a short in the wire somewhere. Unplug the CAT5 from the suspect port, do a shut/no shut do you get the same result? Better still plug a PC into the port, does it stay up/up? Then plug a PC in another port with an FTP server on it and do some file transfers, then check for errors. MikeM - Original Message - From: Hans Stout To: Sent: Tuesday, August 07, 2001 7:51 AM Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15100t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Switch port failure on 3548 [7:15089]
Agreed, that would be the best method but as Hans said in a later message the switch is physicaly very far away. Hans if you can get someone who is onsite to unplug the CAT5 and do a shut/no shut you can see if the behavior changes. Otherwise it sounds like a road trip is in order. - Original Message - From: Michael To: Mike Mandulak ; Sent: Tuesday, August 07, 2001 9:19 AM Subject: RE: Switch port failure on 3548 [7:15089] Herr Stout, Another easy way of determining if the problem is with the port or the cable would be to plug both ends of the cat 5 cable(s) into a cable tester. The manner Mike proposes is legit but I would want to positively know that all pairs are 100%. Once you certify the cable as being good, then the port would probably be the problem. Hopefully it will be the cable...helluva lot cheaper! -Michael Vaughan Senior Network Engineer Predator-Hunter.com Inc. [EMAIL PROTECTED] -Original Message- From: Mike Mandulak Sent: Tue 8/7/2001 8:52 AM To: [EMAIL PROTECTED] Cc: Subject: Re: Switch port failure on 3548 [7:15089] The only way I can think that it would be a cable problem is if there was a short in the wire somewhere. Unplug the CAT5 from the suspect port, do a shut/no shut do you get the same result? Better still plug a PC into the port, does it stay up/up? Then plug a PC in another port with an FTP server on it and do some file transfers, then check for errors. MikeM - Original Message - From: Hans Stout To: Sent: Tuesday, August 07, 2001 7:51 AM Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15101t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Switch port failure on 3548 [7:15089]
Hi Mike, thanks for your answer. Does that mean that if a shut/no shut doesn't result in an up/down, there definitely IS a problem with either the cabling OR the switch port ? For now that is all I need to know... Thanks for your help in advance. Regards, Hans From: Michael Reply-To: Michael To: [EMAIL PROTECTED] Subject: RE: Switch port failure on 3548 [7:15089] Date: Tue, 7 Aug 2001 09:27:36 -0400 Herr Stout, Another easy way of determining if the problem is with the port or the cable would be to plug both ends of the cat 5 cable(s) into a cable tester. The manner Mike proposes is legit but I would want to positively know that all pairs are 100%. Once you certify the cable as being good, then the port would probably be the problem. Hopefully it will be the cable...helluva lot cheaper! -Michael Vaughan Senior Network Engineer Predator-Hunter.com Inc. [EMAIL PROTECTED] -Original Message- From: Mike Mandulak Sent: Tue 8/7/2001 8:52 AM To: [EMAIL PROTECTED] Cc: Subject: Re: Switch port failure on 3548 [7:15089] The only way I can think that it would be a cable problem is if there was a short in the wire somewhere. Unplug the CAT5 from the suspect port, do a shut/no shut do you get the same result? Better still plug a PC into the port, does it stay up/up? Then plug a PC in another port with an FTP server on it and do some file transfers, then check for errors. MikeM - Original Message - From: Hans Stout To: Sent: Tuesday, August 07, 2001 7:51 AM Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp [EMAIL PROTECTED] _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15106t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Switch port failure on 3548 [7:15089]
Hans, The easiest way to troubleshoot this is issue is by connecting a Known Good laptop/desktop directly into the switch port. I would also suggest enabling portfast on the switch ports connecting to host stations (ie workstation, servers, and printers). Regards -Original Message- From: Hans Stout [mailto:[EMAIL PROTECTED]] Sent: Tuesday, August 07, 2001 7:51 AM To: [EMAIL PROTECTED] Subject: Switch port failure on 3548 [7:15089] Hello colleagues, I have a Cisco 3548 switch and I suspect that one of the switch ports is not working. All 48 ports have a CAT5 cable connection, and all ports are patched to the respective wall outlets, there are no active users yet, so all the ports are down/down. When I do a shut/no shut on all the ports, I can see in the log that all ports except one show that the port goes up and then down. To my best knowledge, the fact that the port goes up/down after a shut/no shut shows that the port is ok. The port that doesn't work goes down right away. My question is: does this mean that the actual physical switch port is defective, or that the CAT5 cable attached to the switch isn't working, or that something on the path from the switch port to the wall outlet isn't working ? Thanks for your help in advance ! Regards, Hans _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=15114t=15089 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
