Before someone mentions it, let me say that I already did a search for "discards" on the forum and did not find anything relating to my issue.
With that said, I am using SW Engineer Toolset v9, Network Performance Monitor, and am seeing millions of receive discards on 3 of 7 ports which are active on a Cisco 3508. All 7 active ports are uplinks to other Cisco switches - not connections to servers that might be congested or to routers or firewalls. 4 ports that uplink to other Cisco switches have no problems (no errors reported), 3 have millions. I would think, if the Cisco switch is having problems keeping up with all packets it is receiving, all the ports would show some number of receive discards.
Also, to make matters more confusing, receive discards is not a statistic that the Cisco switches seem to keep track of.
Question - what might cause packets on specific uplinks to be discards, but not packets on other uplinks?
FYI, all 7 active ports on the 3508 seem to have a fairly consistent 1500-1700 packets/sec output rate. Most have virtually no input rate (0-50packets/sec) 2 have 1500-1700 packets/sec input rate, neither of which is one of the probelmatic error filled ports.
Any advice would be most helpful,
JW
P.S. CPU Utilization on the 3508 is at 35%. Mem Ultilization is at 58%