Hello,
I am provisioning a new 3750 switch stack (ip x.x.x.200) to replace an old stack (ip x.x.x.100). I'm having issues with the stack-ports on the new stack. Both stacks are 3750-E 48 ports (all switches in each stack are the same hardware running the same IOS code). My SNMP monitoring is showing stack ports 1-2 and 2-1 as down, so I'm investigating. Below (at the bottom..."SHOW OUTPUT") you find the output from the commands "show switch stack-ports summary", "show switch", and "show version". I've tried disabling and reenabling the stack ports with:
switch 1 stack port 2 disable
switch 2 stack port 1 disable
switch 1 stack port 2 enable
switch 2 stack port 1 enable
but (with console logging) I get the following:
000138: *Mar 1 08:17:14.052 EST: % Disabling stack port not allowed with current stack configuration.
000139: *Mar 1 08:17:34.150 EST: % Disabling stack port not allowed with current stack configuration.
I've also tried reseating the stacking cable between 1-2 and 2-1 and even replacing it with a brand new stacking cable entirely, but get the same switch stack-ports summary. It seems the problem is with port 2-1, but I can't find the stack-port summary trouble shooting for the combination of output shown (link OK = NO, Link Active = NO, but Sync OK = Yes). It looks like both 2-1 and 1-2 are SENDING valid stacking protocol messages (Sync OK = Yes), but for some reason 2-1 is not receiving valid messages (LinkOK = No). See "http://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swstack.html#wp1277038"
So I'm stumped! How can I get both stacking links working properly?
Thanks,
Sue
<<<<<<<<<<<<<<<<< SHOW OUTPUT >>>>>>>>>>>>>>>>>>>>
ServTierSw1#show switch stack-ports summary
Switch#/ Stack Neighbor Cable Link Link Sync # In
Port# Port Length OK Active OK Changes Loopback
Status To LinkOK
-------- ------ -------- -------- ---- ------ ---- --------- --------
1/1 OK 2 50 cm Yes Yes Yes 2 No
1/2 Down None 50 cm Yes No Yes 26 No
2/1 Down None 50 cm No No Yes 24 No
2/2 OK 1 50 cm Yes Yes Yes 2 No
ServTierSw1#show switch
Switch/Stack Mac Address : a8b1.d4e5.6980
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master a8b1.d4e5.6980 15 1 Ready
2 Member a8b1.d4e5.7200 10 1 Ready
ServTierSw1#show ver
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(55)SE1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Thu 02-Dec-10 06:08 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x02800000
ROM: Bootstrap program is C3750E boot loader
BOOTLDR: C3750E Boot Loader (C3750E-HBOOT-M) Version 12.2(44r)SE3, RELEASE SOFTWARE (fc3)
ncmec-ServTierSw1 uptime is 13 hours, 30 minutes
System returned to ROM by power-on
System image file is "flash:c3750e-universalk9-mz.122-55.SE1.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
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: ipbase
License Type: Permanent
Next reload license Level: ipbase
cisco WS-C3750E-48TD (PowerPC405) processor (revision K0) with 262144K bytes of memory.
Processor board ID FDO1424Z042
Last reset from power-on
3 Virtual Ethernet interfaces
1 FastEthernet interface
104 Gigabit Ethernet interfaces
4 Ten Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : A8:B1:D4:E5:69:80
Motherboard assembly number : 73-11175-14
Motherboard serial number : FDO142412MU
Model revision number : K0
Motherboard revision number : A0
Model number : WS-C3750E-48TD-S
Daughterboard assembly number : 800-29737-01
Daughterboard serial number : FDO14240T9F
System serial number : FDO1424Z042
Top Assembly Part Number : 800-28920-03
Top Assembly Revision Number : A0
Version ID : V04
CLEI Code Number : COMCD00ARA
Hardware Board Revision Number : 0x00
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 54 WS-C3750E-48TD 12.2(55)SE1 C3750E-UNIVERSALK9-M
2 54 WS-C3750E-48TD 12.2(55)SE1 C3750E-UNIVERSALK9-M
Switch 02
---------
Switch Uptime : 13 hours, 30 minutes
Base ethernet MAC Address : A8:B1:D4:E5:72:00
Motherboard assembly number : 73-11175-14
Motherboard serial number : FDO142412LB
Model revision number : K0
Motherboard revision number : A0
Model number : WS-C3750E-48TD-S
Daughterboard assembly number : 800-29737-01
Daughterboard serial number : FDO14240UHY
System serial number : FDO1424Z05V
Top assembly part number : 800-28920-03
Top assembly revision number : A0
Version ID : V04
CLEI Code Number : COMCD00ARA
License Level : ipbase
License Type : Permanent
Next reboot licensing Level : ipbase
Configuration register is 0xF
ServTierSw1#
