I just upgraded to a 6513 with sup720's. I moved both csm's and config info to the new config. Everything is working but before the move I could see both csm probe details and they were both operable. Now after the move only the active say's operable and the standby says failed. How do I get this back so that both are operable?
you will have to do some troubleshooting.
Get on the standby.
See if it can ping the server.
'ping mod csm X x.x.x.x'
Check csm arp table.
Check L2 mac-address table between CSM and server.
finally, sniff on the server to see if it gets the probe and if it does send a response.
Once you know exactly why it fails, you'll know how to fix it.