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As per Cisco docs,"Each entry is 72 bytes, followed by a space and then the checksum value." in the databaseYou can approx. the number of entries that you can fit in on your flash.You can also distribute the load by having snooping only on the 2960s ...
interface Port-channel1 <---port-channel 1 logical interface, created when you put a port in a port channel/channel group where multiple ports/links act as a single link with higher bandwidth and loadbalancingswitchport trunk native vlan 101 <---all ...
Thanks for correcting me. The command does accept the tar files.Is the image filename the same as one you downloaded from CCO?It does not like any other names.Can you post the exact upload and download commands you used?
If the issue is not happening with the standby sup, then have you tried replacing the sup1a?Have you tried the cards that failed in other working slots?-Nirav