Cisco WS-C3750V2-48PS-S with WS-C3750V2-48PS-S doesn't set the stack in one direction

[jmhalegre]

Hi Team,

I have 2 WS-C3750V2-48PS-S configured in stack, but I see that one of the stack is not set, why?

CRM_Hercules_3-4#sh switch detail
Switch/Stack Mac Address : 24b6.5779.7c00
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master 24b6.5779.7c00 2 0 Ready
2 Member 24b6.5790.2280 1 0 Ready

Stack Port Status Neighbors
Switch# Port 1 Port 2 Port 1 Port 2
--------------------------------------------------------
1 Ok Down 2 None
2 Down Ok None 1

CRM_Hercules_3-4#

CRM_Hercules_3-4#sh 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 9 No
1/2 Down None 50 cm Yes No Yes 9 No
2/1 Down None 50 cm No No Yes 7 No
2/2 OK 1 50 cm Yes Yes Yes 1 No

CRM_Hercules_3-4#

CRM_Hercules_3-4#sh ver
Switch Ports Model SW Version SW Image
------ ----- ----- ---------- ----------
* 1 52 WS-C3750V2-48PS 12.2(50)SE5 C3750-IPBASEK9-M
2 52 WS-C3750V2-48PS 12.2(50)SE5 C3750-IPBASEK9-M

Thanks & Best Regards,

Juan Miguel Huertas Alegre

[Leo Laohoo]

Means someone has connected only one stacking cable or the other stacking cable connection isn't secure.

[Reza Sharifi]

Hi,

It maybe that one of the stacking cables is loose or has been disconnected.  Check the cable and make sure the pins are inserted all the way into the slot.

HTH

[jmhalegre]

Hi team,

We have connected the 2 stack cables, and we have replaced the cable that connected Switch 1 Port 2 with Switch 2 Port 1 by a new cable, but it still fails.

Is it possible that one of the ports is damaged?

When I launch the command "sh switch stack-ports summary" I see:

Thanks & Best Regards,

Juan Miguel Huertas Alegre

[Julio E. Moisa]

Hi Juan,

Yes, it could be the case, if you have already replaced the stack cables it could be poiting to port issue. Have you restarted the stack and see the behavior?

They should be connected like:

[jmhuertasalegre]

Hi Julio.

When the system restarted it shows the following:

Sep 26 14:07:41.583: %ILPOWER-5-IEEE_DISCONNECT: Interface Fa1/0/17: PD removed
Sep 26 14:07:42.422: %LINK-3-UPDOWN: Interface FastEthernet1/0/17, changed state to down
Sep 27 23:32:59.380: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN
Sep 27 23:32:59.732: %STACKMGR-4-SWITCH_REMOVED: Switch 2 has been REMOVED from the stack
Sep 27 23:33:01.787: %LINK-3-UPDOWN: Interface FastEthernet2/0/48, changed state to down
Sep 27 23:33:02.794: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2/0/48, changed state to down
Sep 27 23:36:23.367: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
Sep 27 23:36:58.490: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack
Sep 27 23:37:11.929: %STACKMGR-5-SWITCH_READY: Switch 2 is READY
Sep 27 23:37:11.929: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Sep 27 23:37:11.929: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 2 has changed to state UP
*Mar 1 00:02:41.505: %STACKMGR-4-SWITCH_ADDED: Switch 1 has been ADDED to the stack (Switch-2)
*Mar 1 00:02:41.505: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack (Switch-2)
*Mar 1 00:02:45.062: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan (CRM_Hercules_3-4-2)
*Sep 27 22:37:07.340: %SYS-6-CLOCKUPDATE: System clock has been updated from 21:37:07 UTC Wed Sep 27 2017 to 22:37:07 MET Wed Sep 27 2017, configured from console by console. (CRM_Hercules_3-4-2)
*Sep 27 23:37:07.340: %SYS-6-CLOCKUPDATE: System clock has been updated from 22:37:07 MET Wed Sep 27 2017 to 23:37:07 DST Wed Sep 27 2017, configured from console by console. (CRM_Hercules_3-4-2)
*Sep 27 23:37:11.828: %SYS-5-CONFIG_I: Configured from memory by console (CRM_Hercules_3-4-2)
*Sep 27 23:37:11.887: %STACKMGR-5-SWITCH_READY: Switch 1 is READY (CRM_Hercules_3-4-2)
*Sep 27 23:37:12.591: %STACKMGR-5-MASTER_READY: Master Switch 1 is READY (CRM_Hercules_3-4-2)
*Sep 27 23:37:12.742: %SYS-5-RESTART: System restarted -- (CRM_Hercules_3-4-2)
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1) (CRM_Hercules_3-4-2)
Technical Support: http://www.cisco.com/techsupport (CRM_Hercules_3-4-2)
Copyright (c) 1986-2010 by Cisco Systems, Inc. (CRM_Hercules_3-4-2)
Compiled Tue 28-Sep-10 12:56 by prod_rel_team (CRM_Hercules_3-4-2)
*Sep 27 23:37:12.742: %STACKMGR-5-SWITCH_READY: Switch 2 is READY (CRM_Hercules_3-4-2)
Sep 27 23:37:19.546: %LINK-3-UPDOWN: Interface FastEthernet2/0/48, changed state to up
Sep 27 23:37:20.552: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2/0/48, changed state to up
Sep 27 23:37:51.263: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN
Sep 27 23:37:53.285: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
Sep 27 23:37:53.872: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 2 has changed to state DOWN
Sep 27 23:37:53.872: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 2 has changed to state UP
Sep 27 23:37:56.305: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN
Sep 27 23:37:56.473: %STACKMGR-4-SWITCH_REMOVED: Switch 2 has been REMOVED from the stack
Sep 27 23:37:58.511: %LINK-3-UPDOWN: Interface FastEthernet2/0/48, changed state to down
Sep 27 23:37:59.518: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2/0/48, changed state to down
Sep 27 23:41:39.494: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state UP
Sep 27 23:42:19.382: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack
Sep 27 23:42:35.102: %STACKMGR-5-SWITCH_READY: Switch 2 is READY
Sep 27 23:42:35.102: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Sep 27 23:42:35.102: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 2 has changed to state UP
*Mar 1 00:00:51.925: %STACKMGR-4-SWITCH_ADDED: Switch 1 has been ADDED to the stack (Switch-2)
*Mar 1 00:00:51.925: %STACKMGR-4-SWITCH_ADDED: Switch 2 has been ADDED to the stack (Switch-2)
*Mar 1 00:00:55.742: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan (Switch-2)
*Sep 27 22:42:30.170: %SYS-6-CLOCKUPDATE: System clock has been updated from 21:42:30 UTC Wed Sep 27 2017 to 22:42:30 MET Wed Sep 27 2017, configured from console by console. (CRM_Hercules_3-4-2)
*Sep 27 23:42:30.170: %SYS-6-CLOCKUPDATE: System clock has been updated from 22:42:30 MET Wed Sep 27 2017 to 23:42:30 DST Wed Sep 27 2017, configured from console by console. (CRM_Hercules_3-4-2)
*Sep 27 23:42:34.985: %SYS-5-CONFIG_I: Configured from memory by console (CRM_Hercules_3-4-2)
*Sep 27 23:42:35.043: %STACKMGR-5-SWITCH_READY: Switch 1 is READY (CRM_Hercules_3-4-2)
*Sep 27 23:42:35.748: %STACKMGR-5-MASTER_READY: Master Switch 1 is READY (CRM_Hercules_3-4-2)
*Sep 27 23:42:35.899: %SYS-5-RESTART: System restarted -- (CRM_Hercules_3-4-2)
Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1) (CRM_Hercules_3-4-2)
Technical Support: http://www.cisco.com/techsupport (CRM_Hercules_3-4-2)
Copyright (c) 1986-2010 by Cisco Systems, Inc. (CRM_Hercules_3-4-2)
Compiled Tue 28-Sep-10 12:56 by prod_rel_team (CRM_Hercules_3-4-2)
*Sep 27 23:42:35.907: %STACKMGR-5-SWITCH_READY: Switch 2 is READY (CRM_Hercules_3-4-2)
Sep 27 23:42:41.981: %LINK-3-UPDOWN: Interface FastEthernet2/0/48, changed state to up
Sep 27 23:42:42.988: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet2/0/48, changed state to up
Sep 27 23:47:38.126: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Sep 27 23:47:38.420: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state UP
Sep 27 23:47:46.489: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Sep 27 23:47:47.203: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN
Sep 27 23:47:57.596: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state UP
Sep 27 23:47:58.603: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Sep 27 23:48:07.419: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state UP
Sep 27 23:48:07.688: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state UP
Sep 27 23:48:08.703: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 2 has changed to state DOWN
Sep 27 23:48:09.433: %STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN

Thanks & Best Regards,

Juan Miguel Huertas Alegre

[Meheretab Mengistu]

Have you tried connecting only SW1 port 2 and SW2 port 1?

[jmhuertasalegre]

No,

The switches are in production and it is difficult to make tests, we have requested a window to make tests, but we don't know when they will leave us.

Tests to be performed:

- Only connect the cable from SW1 P1 to SW2 P2.
- Only connect the cable from SW1 P2 to SW2 P1.
- Perform a "diagnostic start switch # test".

Once these tests have been performed, we will determine if the problem is in one of the stack ports and we will proceed with the management of an RMA.

One question, can I make the following combination to verify if the problem is on a stack port?

Thanks & Best Regards,

Juan Miguel Huertas Alegre

[Joseph W. Doherty]

Yes, you can.

[jmhalegre · Accepted solution]

Perfect Joseph,

When customer authorizes us to perform the tests, I'll remember.

Thanks & Best Regards,

Juan Miguel Huertas Alegre