I have a problem with my networks Catalyst 4506 (IOS version 12.2(25)EWA7) each week. Every week more or less on the same day I lose network connectivity to some VLAN's. At the same time I can no longer telnet to the device. Connecting via the console I receive various errors such as %% Low on memory; try again later or %SYS-2-MALLOCFAIL. Rebooting the 4506 fixes the problem. Reloading it anytime on the day the problem usually occurs, before it occurs fixes the problem for that week!
I'm not sure what is causing this problem or how to track down its cause, Any help with be greatly appreciated.
there is probably a software bug that causes some process to eat memory over time:
the fact that if you reload it before the critical point it will stay up for another week is meaningful
memory leakage is the right term for this behaviour
I would think of an IOS upgrade
Hope to gelp