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Community Member

unable to stack 3750 switches

Hi,

I have got a question about stack of the 3750 switch. I need to add one more member to the stack.

After configured the switches priority and downgrade the IOS version same to the master in 3750 stack.

then I connect the stack cable and power on the new 3750. then the boot process was hanged after the master election complete.

Cisco Internetwork Operating System Software

IOS (tm) C3750 Software (C3750-I9-M), Version 12.1(14)EA1a, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Tue 02-Sep-03 05:15 by antonino

Image text-base: 0x00003000, data-base: 0x0079DB54

Initializing flashfs...

flashfs[1]: 4 files, 1 directories

flashfs[1]: 0 orphaned files, 0 orphaned directories

flashfs[1]: Total bytes: 15998976

flashfs[1]: Bytes used: 3388416

flashfs[1]: Bytes available: 12610560

flashfs[1]: flashfs fsck took 8 seconds.

flashfs[1]: Initialization complete....done Initializing flashfs.

POST: CPU MIC register Tests : Begin

POST: CPU MIC register Tests : End, Status Passed

POST: PortASIC Memory Tests : Begin

POST: PortASIC Memory Tests : End, Status Passed

POST: CPU MIC PortASIC interface Loopback Tests : Begin

POST: CPU MIC PortASIC interface Loopback Tests : End, Status Passed

POST: PortASIC RingLoopback Tests : Begin

POST: PortASIC RingLoopback Tests : End, Status Passed

Waiting for Stack Master Election (around 20 seconds)...

POST: PortASIC CAM Subsystem Tests : Begin

POST: PortASIC CAM Subsystem Tests : End, Status Passed

POST: No Cable found on stack port 2

POST: PortASIC Stack Port Loopback Tests : Begin

POST: Found Stack port 2 Down

POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin

POST: PortASIC Port Loopback Tests : End, Status Passed

Election Complete

Switch 2 booting as Slave, Switch 1 elected Master

Waiting for Port download...<hang>

any suggestions about the case?

Regards,

Weng Kin

5 REPLIES
Hall of Fame Super Silver

Re: unable to stack 3750 switches

Hello Weng,

the following document can help

http://www.cisco.com/en/US/partner/docs/switches/lan/catalyst3750/software/troubleshooting/switch_stacks.html

or

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/troubleshooting/switch_stacks.html

However,

>> POST: No Cable found on stack port 2

you need to close a ring topology it looks like a cable is missing

you need to add a cable from last added switch to the first.

OR there is a cable that is faulty or not correctly plugged.

Hope to help

Giuseppe

Purple

Re: unable to stack 3750 switches

I would also advise you upgrade both boxes . 12.1.14EA1 has to be like the first IOS they ever put on those boxes and could be part of the problem . The latest is like 12.2.52 SG .

Bronze

Re: unable to stack 3750 switches

Glen,

I agree on the upgrade part; however, the 12.2SG is for Cat4500 - you'll need 12.2(50)SE3 as the most recent.

HTH

Purple

Re: unable to stack 3750 switches

You are right I got the last letter wrong , just was doing it off the top of my head. Should be SE not SG .

Community Member

Re: unable to stack 3750 switches

Hi all,

After upgraded the IOS of the switches, it can be stackable now. Thanks for your help.

Regards,

Weng Kin

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