I have a Catalyst 6509 with a SUP720 running a modular IOS. The IOS filename is s72033-adventerprisek9_wan-vz.122-18.SXF6.bin. I have noticed that the CPU utilization on this switch increases constantly since the time it was last rebooted. On all of our other switches and routers the CPU is higher during the day, and lower during the evening, but with this 6509, the CPU constantly climbs. It never decreases at all. This climb may take over 2 months, but it will start at about 10% utilization, and within 2 months, it'll be near 40% utilization.
I have another 6509 that was just deployed and is also running a modular IOS (but a different version), and I am experiencing the exact same thing. On other 6509's that are running the standard IOS (not modular) we do not see this.
Does anyone know if there are any known issues like this? I tried searching the bug lists, but I didn't see any obvious bugs.