6509 - multiple ports dropping once a day at exact time

jmdriscoll · ‎04-04-2008

Without getting too detailed, I have a 6509 with a 48port 10/100/1000 GigE card installed. 7 ports have major ping and comms drops to them daily from 10:00am to 11:00am. Through all troubleshooting and cable swapping, etc... the trouble has remained with the ports and has not been specific to any piece of equipment, IP or VLAN... just the 7 ports that drop major pings daily between 10:00 - 11:00am. Anybody ever run across one like this? Seems like a timer is expiring somewhere.. and it is central to the router... But WHAT??

Istvan_Rabai · ‎04-04-2008

Hi Mike,

Without promising much, may I ask you to post the running-config of the 6509 switch here?

Thanks:

Istvan

jmdriscoll · ‎04-05-2008

Istvan, due to security reasons, I cannot share the config. I really just posted a thread here to see if anybody has ever experienced this trouble, and what the cause was.

Thanks.

noroutes4u · ‎04-07-2008

Anything show up in the log?

jmdriscoll · ‎04-07-2008

nothing in the log.

kevin-hogan · ‎04-07-2008

Are all 7 ports on the same ASIC... it could be traffic driven, possibly something scheduled on a server. Check the ASIC layout of the card to determine the oversubscription, then dig into any strange applications or use. (Span ports are a common culprit) Odd that it happens at the same time everyday- I would suspect is an automated network backup with the wrong schedule on a 6148 linecard. Good luck.