Hi Lek,
Please let me know the following:
1- What's the model of the Switch? ( Get me show version output).
2- If it is Cat 4500/3750 ( Get me the output of show platform crash dump, show stacks , check for any crash file under flash of cat 3750)
3- If it is Cat 6500, Get the crash info file generated in bootflash and sup bootflash or disk0.
Regards
Inayath