I am having a really strange problem with certain ethernet ports on my cisco catalyst 6506 switch. I have four WS-X6148-GE-TX (48 port 10/100/1000 ethernet) cards residing in slots 3 thru 6. I am having connectivity issues on ports 3/1, 3/26-30 and 4/26-30. Any device plugged into these ports will have poor connectivity and a ping from any other device on the network (even plugged into the same switch) will result in about 500ms response time. Strange thing is that it is ANY device plugged into these "bad" ports have the issue, so it's not a NIC driver or autonegotiation issue. And the weird part is that its the pretty much exactly the same bad ports on the cards in both slot 3 and 4, so its most likely not a hardware issue, it would seem. And the strangest symptom of all is that the issue only exists between 9am and 11pm. Between 11pm and 9am, any devices on these ports respond to pings in < 1ms locally. The supervisors are in slots 1 and 2 (WS-X6K-SUP2 with MSFC2), What could possibly be causing these issues?
I have this problem too.