Link-flap causes switch reboot

[Zeeeee]

Hi, 

I have a question. My 3750x switch rebooted by itself like 6 to 8 times a day. After the reboot, I noticed in the log that there is a link-flap to 1 of the interface. Can link-flap cause the switch to reboot? 

Thank you, 

Zeeeee

[dbeattie]

Anything is possible if you consider what might happen if you are experiencing a bug, but this certainly shouldn't happen. I would tend to ensure that you are running the latest stable (recommended) code level. After this, ensure that you are not running any impacting EEM functionality. Finally, take steps to reduce the impact of an interface flap, e.g. if appropriate: Implement Control Plane Policing, Implement dampening, use BFD for rapid failure detection rather than over tuning routing protocols, and limit logging and trapping to only the levels that you need.

Hope this helps,

Dave

[Zeeeee]

Hi Dave, 

Thank you for the tips. Will take note of that. 

Regards, 

Zeeeee

[Leo Laohoo]

Post the complete output to the following commands:
1. sh version;
2. dir

[Zeeeee]

Hi Leo, 

I do not have access to the switch now. Will post to you as soon as I can. 

In the meantime, i have read some other posts and you had mentioned that 12.2(55)SE8 is reliable. May need your advise on the type of bootloader for this IOS. 

Regards, 

Zeeeee

[Leo Laohoo]

Bootloader is not important. 12.2(55)SE train is the most stable IOS from Cisco. Download the latest one.

[Zeeeee]

Hi,

I found the problem. It was related to Bug CSCto85754.

Thank you all for your assistance and tips!

Regards,

Zeeeee

[Zeeeee]

Hi Leo, 

Unfortunately, problem is not solved. It rebooted again earlier. 

Here are the info that you requested. 

RC-RC-00#show ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 21-Jul-11 01:23 by prod_rel_team

ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750X-HBOOT-M) Version 12.2(58r)SE1, RELEASE SOFTWARE (fc1)

RC-RC-00 uptime is 1 hour, 12 minutes
System returned to ROM by power-on
System restarted at 12:24:21 GMT Fri Sep 21 2018
System image file is "flash:/c3750e-universalk9-mz.122-58.SE2/c3750e-universalk9-mz.122-58.SE2.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
 --More--         to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

License Level: ipservices
License Type: Permanent
Next reload license Level: ipservices

cisco WS-C3750X-24S (PowerPC405) processor (revision R0) with 524288K bytes of memory.
Processor board ID FDO1852F19H
Last reset from power-on
2 Virtual Ethernet interfaces
1 FastEthernet interface
28 Gigabit Ethernet interfaces
2 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : F4:CF:E2:88:C8:00
 --More--         Motherboard assembly number     : 73-13061-07
Motherboard serial number       : FDO18490LPP
 --More--         Model revision number           : R0
Motherboard revision number     : A0
Model number                    : WS-C3750X-24S-E
Daughterboard assembly number   : 800-32727-03
Daughterboard serial number     : FDO18521DN6
System serial number            : FDO1852F19H
Top Assembly Part Number        : 800-33746-06
Top Assembly Revision Number    : E0
Version ID                      : V05
CLEI Code Number                : CMMP200DRA
Hardware Board Revision Number  : 0x05

Switch Ports Model              SW Version            SW Image                 
------ ----- -----              ----------            ----------               
*    1 30    WS-C3750X-24S      12.2(58)SE2           C3750E-UNIVERSALK9-M     

Configuration register is 0xF

RC-RC-00#
RC-RC-00#dir
Directory of flash:/

    2  drwx        4096   Mar 1 1993 08:08:08 +08:00  crashinfo_ext
   25  -rwx          57   Mar 1 1993 08:19:14 +08:00  express_setup.debug
   26  -rwx         916   Mar 1 1993 08:01:14 +08:00  vlan.dat
   27  drwx        4096   Mar 1 1993 08:00:08 +08:00  crashinfo
   29  -rwx        2053   Mar 1 1993 08:01:45 +08:00  config.ext.old
   30  drwx        4096   Mar 1 1993 08:37:19 +08:00  c3750e-universalk9-mz.122-58.SE2
  488  -rwx        3096   Mar 1 1993 08:01:21 +08:00  multiple-fs
  485  -rwx        1919  Sep 20 2018 14:12:48 +08:00  private-config.text
  487  -rwx        9957  Sep 20 2018 14:12:47 +08:00  config.text

119144448 bytes total (89067520 bytes free)
RC-RC-00#

Thank you, 

Zeeeee

[Leo Laohoo]

I am not troubleshooting anything running 12.2(58)SE train. This train is one of the top buggiest version.

[Zeeeee]

Hi Leo,

I am currently working on changing it to 12.2(55)SE12.

Thank you,

Zeeeee