Re: Intermittent connectivity loss [7:14416]
This may sound stupid... but have the obvious been checked 1) duplex settings 2) speed settings 3) portfast enabled (only on user ports) Don Oxman wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I must admit this is my first question posted to the group, though I've been a lurker for a long time. Here it is: We have workstations on 10 different floors (each floor divided in half, each half a different subnet), all connected to 5505's (20 in total). From the 5505's fiber goes to a 6509, then ultimately to the WAN via ATM. The servers all plug into the 6509. So far, so good. For the past 3 days we have had workstations (not all, but about 50%)on every floor lose connectivity to the network, whereby all of our NT and NetWare servers are unavailable and web browsing is gone. This has happened a total of 6 times, and there doesn't appear to be a pattern to the time or network utilization. Most times the users have to reboot, though sometimes they can reconnect without a reboot. Can anyone help steer me in the right direction? Our WAN guys can't help, and I have a feeling that it's going to be up to me to figure this one out. Thanks a lot. --Don _ 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=14476t=14416 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Intermittent connectivity loss [7:14416]
u may ve virus code red Best Regards Have A Good Day!! *** Farhan Ahmed* MCSE+I, MCP Win2k, CCDA, CCNA, CSE Network Engineer Mideast Data Systems Abudhabi Uae. *** Privileged/Confidential Information may be contained in this message or Attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, Conclusions and other information in this message that do not relate to the Official business of this company shall be understood as neither given nor Endorsed by it. -Original Message- From: Santosh Koshy [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 01, 2001 4:37 PM To: [EMAIL PROTECTED] Subject: Re: Intermittent connectivity loss [7:14416] This may sound stupid... but have the obvious been checked 1) duplex settings 2) speed settings 3) portfast enabled (only on user ports) Don Oxman wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... I must admit this is my first question posted to the group, though I've been a lurker for a long time. Here it is: We have workstations on 10 different floors (each floor divided in half, each half a different subnet), all connected to 5505's (20 in total). From the 5505's fiber goes to a 6509, then ultimately to the WAN via ATM. The servers all plug into the 6509. So far, so good. For the past 3 days we have had workstations (not all, but about 50%)on every floor lose connectivity to the network, whereby all of our NT and NetWare servers are unavailable and web browsing is gone. This has happened a total of 6 times, and there doesn't appear to be a pattern to the time or network utilization. Most times the users have to reboot, though sometimes they can reconnect without a reboot. Can anyone help steer me in the right direction? Our WAN guys can't help, and I have a feeling that it's going to be up to me to figure this one out. Thanks a lot. --Don _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp [GroupStudy.com removed an attachment of type application/octet-stream which had a name of Farhan Ahmed.vcf] Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=14486t=14416 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Intermittent connectivity loss [7:14416]
For the past 3 days we have had workstations (not all, but about 50%)on every floor lose connectivity to the network, whereby all of our NT and NetWare servers are unavailable and web browsing is gone. This has happened a total of 6 times, and there doesn't appear to be a pattern to the time or network utilization. Most times the users have to reboot, though sometimes they can reconnect without a reboot. Can anyone help steer me in the right direction? Our WAN guys can't help, and I have a feeling that it's going to be up to me to figure this one out. Thanks a lot. --Don You will need to do troubleshooting at two levels here(Network and Datalink. When these users loose connectivity, what is the furthest that they can reach (traceroute out to the NET, see how far they got, from the workstation). You can also do some datalink layer troubleshooting by having a console logging one of the 5505's for example. This could be spanning tree pruning. Has any new equipment been added, any new ports turned up in the past 3 days ? Can the users ping one another, can they ping the switch. Can you reach the switch? Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=14419t=14416 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Intermittent connectivity loss [7:14416]
I understand you to say that there are two 5505s on each floor. Half of the users on each floor connect to each 5505 through a single vlan. Each 5505 connects to a 6509. Has anyone changed the config of any of the switches lately? Any hardware changes? Thinking intermittant hardware failure. Do all the users on a floor who loose connectivity connect to the same 5505? Does the aggregate of all users on all floors who loose connectivity connect to the 6509 through the same blade via their 5505s? Any error messages on the 6509? What's the uptime? What does a show log provide? What is the bandwidth of the links between the 5505s and the 6509? If gig, do you have any spare GBICs? I have heard reports of failing units. Any construction in the building? How about lots of dust in the wiring closets? Any commonality to the electrical feeds for the switches? UPS or not? Can you log error messages to a syslog server? -Original Message- From: Don Oxman [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 31, 2001 6:44 PM To: [EMAIL PROTECTED] Subject: Intermittent connectivity loss [7:14416] I must admit this is my first question posted to the group, though I've been a lurker for a long time. Here it is: We have workstations on 10 different floors (each floor divided in half, each half a different subnet), all connected to 5505's (20 in total). From the 5505's fiber goes to a 6509, then ultimately to the WAN via ATM. The servers all plug into the 6509. So far, so good. For the past 3 days we have had workstations (not all, but about 50%)on every floor lose connectivity to the network, whereby all of our NT and NetWare servers are unavailable and web browsing is gone. This has happened a total of 6 times, and there doesn't appear to be a pattern to the time or network utilization. Most times the users have to reboot, though sometimes they can reconnect without a reboot. Can anyone help steer me in the right direction? Our WAN guys can't help, and I have a feeling that it's going to be up to me to figure this one out. Thanks a lot. --Don _ 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=14426t=14416 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: Intermittent connectivity loss [7:14416]
Hi Daniel, We had a similar situation few days back. Users connected on One of our switches were complaining of intermittent loss in connectivity. We had a problem with the GBIC port on one of our Catalyst switch. Regds Amit -Original Message- From: Daniel Cotts [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 01, 2001 6:37 AM To: [EMAIL PROTECTED] Subject:RE: Intermittent connectivity loss [7:14416] I understand you to say that there are two 5505s on each floor. Half of the users on each floor connect to each 5505 through a single vlan. Each 5505 connects to a 6509. Has anyone changed the config of any of the switches lately? Any hardware changes? Thinking intermittant hardware failure. Do all the users on a floor who loose connectivity connect to the same 5505? Does the aggregate of all users on all floors who loose connectivity connect to the 6509 through the same blade via their 5505s? Any error messages on the 6509? What's the uptime? What does a show log provide? What is the bandwidth of the links between the 5505s and the 6509? If gig, do you have any spare GBICs? I have heard reports of failing units. Any construction in the building? How about lots of dust in the wiring closets? Any commonality to the electrical feeds for the switches? UPS or not? Can you log error messages to a syslog server? -Original Message- From: Don Oxman [mailto:[EMAIL PROTECTED]] Sent: Tuesday, July 31, 2001 6:44 PM To: [EMAIL PROTECTED] Subject: Intermittent connectivity loss [7:14416] I must admit this is my first question posted to the group, though I've been a lurker for a long time. Here it is: We have workstations on 10 different floors (each floor divided in half, each half a different subnet), all connected to 5505's (20 in total). From the 5505's fiber goes to a 6509, then ultimately to the WAN via ATM. The servers all plug into the 6509. So far, so good. For the past 3 days we have had workstations (not all, but about 50%)on every floor lose connectivity to the network, whereby all of our NT and NetWare servers are unavailable and web browsing is gone. This has happened a total of 6 times, and there doesn't appear to be a pattern to the time or network utilization. Most times the users have to reboot, though sometimes they can reconnect without a reboot. Can anyone help steer me in the right direction? Our WAN guys can't help, and I have a feeling that it's going to be up to me to figure this one out. Thanks a lot. --Don _ 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=14446t=14416 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
