Below is the info collected form Crash info:
Nov 27 17:44:21 IST: %FABRIC-SP-3-DISABLE_FAB: The fabric manager disabled active fabric in slot 6 due to the error (2) on this channel (FPOE 4) connected to slot 6
Nov 27 17:44:21.098 IST: SP: Supervisor has bad local fabric channel. StbyRdyForSwOver 0, StbyLocalFabLinkOk 0
*Nov 27 16:41:36 IST: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for typt change the spanning tree topology
*Nov 27 16:41:37 IST: %SYS-5-CONFIG_I: Configured from memory by console
*Nov 27 16:41:41 IST: %SYS-5-RESTART: System restarted --
Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(33)SXH1, RELEASE SOFTWARE (fc3)
Is that all? You want answers as to why the chassis rebooted and this is the only information you can furnish?