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Standalone 3750 Switch shows Stack Change Error message

muhammadad1
Level 1
Level 1

we are having 3750 standalone switch in our network. IT automatically reboot. through logging history it shows Stack_Link_Change message but this switch is standalone switch.

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C3750-1# sh version
Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 19:15 by nachen
Image text-base: 0x00003000, data-base: 0x01080000

ROM: Bootstrap program is C3750 boot loader
BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.1(19r)EA1b, RELEASE SOFTWARE (fc2)

C3750-1 uptime is 3 hours, 11 minutes
System returned to ROM by power-on
System restarted at 23:22:58 GMT Mon Aug 8 2011
System image file is "flash:c3750-ipbase-mz.122-35.SE5.bin"

cisco WS-C3750-24P (PowerPC405) processor (revision D0) with 118784K/12280K bytes of memory.
Processor board ID CAT0847N0Y3
Last reset from power-on
4 Virtual Ethernet interfaces
24 FastEthernet interfaces
2 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address       : 00:12:80:65:94:00
Motherboard assembly number     : 73-8312-05
Power supply part number        : 341-0029-03
Motherboard serial number       : CAT08470DDE
Power supply serial number      : LIT0841015S
Model revision number           : D0
Motherboard revision number     : A0
Model number                    : WS-C3750-24PS-S
System serial number            : CAT0847N0Y3
Top Assembly Part Number        : 800-21982-02
Top Assembly Revision Number    : B0
Version ID                      : N/A
Hardware Board Revision Number  : 0x0A


Switch   Ports  Model              SW Version              SW Image           
------   -----  -----              ----------              ----------         
*    3   26     WS-C3750-24P       12.2(35)SE5             C3750-IPBASE-M     


Configuration register is 0xF

---------------------------------------------------------------------------------------------------------------

C3750-1#sh logging

*Mar  1 05:00:33: %SYS-5-CONFIG_I: Configured from memory by console

*Mar  1 05:00:33: %STACKMGR-5-SWITCH_READY: Switch 3 is READY

*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state DOWN

*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 3 has changed to state DOWN

*Mar  1 05:00:34: %STACKMGR-5-MASTER_READY: Master Switch 3 is READY

*Mar  1 05:00:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down

*Mar  1 05:00:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan48, changed state to down

*Mar  1 05:00:34: %SYS-5-RESTART: System restarted --

Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Thu 19-Jul-07 19:15 by nachen

*Mar  1 05:00:34: %SNMP-5-COLDSTART: SNMP agent on host C3750-1 is undergoing a cold start

*Mar  1 05:00:35: %LINK-5-CHANGED: Interface FastEthernet3/0/22, changed state to administratively down

*Mar  1 05:00:35: %LINK-5-CHANGED: Interface Vlan1, changed state to administratively down *Mar  1 05:00:33: %SYS-5-CONFIG_I: Configured from memory by console
*Mar  1 05:00:33: %STACKMGR-5-SWITCH_READY: Switch 3 is READY
*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state DOWN
*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 3 has changed to state DOWN
*Mar  1 05:00:34: %STACKMGR-5-MASTER_READY: Master Switch 3 is READY
*Mar  1 05:00:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down
*Mar  1 05:00:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan48, changed state to down
*Mar  1 05:00:34: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C3750 Software (C3750-IPBASE-M), Version 12.2(35)SE5, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Thu 19-Jul-07 19:15 by nachen
*Mar  1 05:00:34: %SNMP-5-COLDSTART: SNMP agent on host C3750-1 is undergoing a cold start
*Mar  1 05:00:35: %LINK-5-CHANGED: Interface FastEthernet3/0/22, changed state to administratively down
*Mar  1 05:00:35: %LINK-5-CHANGED: Interface Vlan1, changed state to administratively down

1 Accepted Solution

Accepted Solutions

The bugs that I provided are also related to the standalone switches, I cannot share internal bug details.

I have seen this issue before & I do understand that this is a standalone switch.

Most of the times this would be because of faulty stack ports which cannot really be detected y the software. I also looked at the cases attached to the bug & found some similar cases.

View solution in original post

6 Replies 6

Amit Aneja
Level 3
Level 3

There was a bug opened for this quite some time back,

CSCsj80738

CSCei29940

Please look at their details on CCO.

There are also some field notices released by Cisco, you might want to check if this switch is affected by one of those.

My guess is that this is because of faulty hardware, you would need to get the switch replaced.

HTH,

Amit

thanks amit, but my switch is working in standalone environment and its showing stack error ?

the Bug IDs you provided are related with switch working in stack.

The bugs that I provided are also related to the standalone switches, I cannot share internal bug details.

I have seen this issue before & I do understand that this is a standalone switch.

Most of the times this would be because of faulty stack ports which cannot really be detected y the software. I also looked at the cases attached to the bug & found some similar cases.

thanks a lot Amit for your time

rakhokha
Cisco Employee
Cisco Employee

 ========

STACKMGR-4-SWITCH_ADDED: Switch [dec] has been ADDED to the stack. Note This message applies only to Catalyst 3750, 2975, and 2960-S switches. 

 ===========

Stack logs generated on a standalone switch, note that this is expected behavior.

Logs: -

Mar  1 05:00:33: %SYS-5-CONFIG_I: Configured from memory by console

*Mar  1 05:00:33: %STACKMGR-5-SWITCH_READY: Switch 3 is READY

*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 3 has changed to state DOWN

*Mar  1 05:00:33: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 3 has changed to state DOWN

*Mar  1 05:00:34: %STACKMGR-5-MASTER_READY: Master Switch 3 is READY

 

Those logs DO get generated, even on a standalone switch, during the boot process. The boot sequence is:

- Boot Loader

- Flash System initialization

- IOS Loading

- POST diagnostic tests

- Stack Master election

- Switch finishes booting in assigned role

A standalone switch can be thought of as a stack of 1 switch, so during the stack master election step, the stack ports are checked in order to detect potential connected switches.

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