A 4506 Switch reboot several times a day for no reason, I have been trying to upgrade the software . Normal operation of more than ten days , Still there reason to restart . cpu and memory usage is normal
Switch output information below, please help me see what caused this failure
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
HKZ-SSL-4-NAN-4506#sh ver
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-ENTSERVICES-M), Version 12.2(54)SG1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 27-Jan-11 11:57 by prod_rel_team
Image text-base: 0x10000000, data-base: 0x12C245CC
ROM: 12.2(44r)SG5
Darkside Revision 4, Nexu Revision 9, Fortooine Revision 1.22
HKZ-SSL-4-NAN-4506 uptime is 5 days, 15 hours, 51 minutes
System returned to ROM by reload
System restarted at 18:47:57 Beijing Tue May 21 2013
System image file is "bootflash:cat4500e-entservices-mz.122-54.SG1.bin"
Last reload reason: Unknown reason <------------------------- I think this is a prompt, but I can not find the document is Cisco's why
cisco WS-C4506-E (MPC8548) processor (revision 8) with 524288K bytes of memory.
Processor board ID FOX1332GCL0
MPC8548 CPU at 1GHz, Supervisor 6L-E
Last reset from Reload
2 Virtual Ethernet interfaces
52 Gigabit Ethernet interfaces
2 Ten Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
Configuration register is 0x2102
HKZ-SSL-4-NAN-4506#sho module
Chassis Type : WS-C4506-E
Power consumed by backplane : 0 Watts
Mod Ports Card Type Model Serial No.
---+-----+--------------------------------------+------------------+-----------
1 6 Sup 6L-E 10GE (X2), 1000BaseX (SFP) WS-X45-SUP6L-E JAE1333GH8X
2 48 1000BaseX SFP WS-X4448-GB-SFP JAE1331FSIA
M MAC addresses Hw Fw Sw Status
--+--------------------------------+---+------------+----------------+---------
1 0026.cbe0.2bc0 to 0026.cbe0.2bc5 1.0 12.2(44r)SG5 12.2(54)SG1 Ok
2 0023.eb22.4390 to 0023.eb22.43bf 1.3 Ok
HKZ-SSL-4-NAN-4506#show environment temperature
Module Sensor Temperature Status
------+--------------------------+--------------------+------------
1 air inlet 40C (51C,65C,68C) ok
1 air outlet 49C (69C,83C,86C) ok
HKZ-SSL-4-NAN-4506#
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
