HI Sir,
Couple of things to chck
1) From the switch "show interface terse | match inet" > Does this show your mgmt IP?
2) Can you ping the mgmt IP from switch itself. > ping mgmt ip address
3) show interface me0 extensive
4) show log messages | match me0
One more way to resolve this without reboot would be delete and reconfigure me0.
Before this try this in shell
ifconfig me0 down
ifconfig me0 up
Thanks
Partha