Hi All,
Their is a weird problem we are having with MAC-FLAPS and HIGH CPU uses. The odd think is when we change the VLAN on the port to a different one then the flapping stops but when we turn it back it starts again. I removed the Vlan from a switch (3750) and the CPU usage returned back to normal even though it was only using it for a printer only (was 50%/30% cpu!).
However the problem now exists with TWO 2960 PCS and 1 2960 POE and they have HULC LED PROCESS at 65%/40% plus CPU usage. There are no STP or HSRP issues on that VLAN however I think it's related to that VLAN. I even backdated the IOS version and reloaded but problem still persists.
What else can I do or is the switch gone (memory leak?). I don't to change all 3 switches so how do I know which switch is the cause as the CPU to be High and only caused due to 1 vlan? ALso when we put something on that VLAN sometimes we get MACFLAPS; although if we change the VLAN the MACFLAPS stop. But the Macflaps are intermittent so I really am not sure what the problem is.
