Troubleshoot OOBM and split stack issues

If all the OOBM ports in the stack are in the same VLAN, you can use the show oobm commands to view the current state of all the switches. For example, if you have a five-member chain and member 4 fails or has the power removed, a stack split will occur with an active fragment on members 1-2-3 and an inactive fragment on member 5.

There is one IP address for the active fragment. This can be statically set by assigning an IP address to the global OOBM port.

If the stack splits, you can connect to the Active Fragment using the global OOBM IP address and then enter the show oobm discovery command to see if this active fragment has discovered any other members that are connected using the OOBM LAN.

In the following five member chain example, connect using the global IP address of 10.0.11.49. Once logged on, enter the show stacking command.

Viewing stacking member status

switch# show stacking

Stack  ID          : 00011cc1-de4d87c0

MAC  Address       : 1cc1de -4d87e5
Stack  Topology    : Chain
Stack  Status      : Fragment
Active Uptime      : 0d 0h 5m
Software  Version  : KA.15.03.0000x

Mbr
ID  Mac Address    Model                                 Pri  Status
--- ------------- -------------------------------------- --- ---------------
1   1cc1de-4d87c0  HPE J9573A 3810-24G-PoE+-2SFP+ Switch  128  Commander
2   1cc1de-4dc740  HPE J9573A 3810-24G-PoE+-2SFP+ Switch  128  Member
3   1cc1de-4dbd40  HPE J9575A 3810-24G-2SFP+ Switch       128  Standby
4   1cc1de-4d79c0  HPE J9576A 3810-48G-4SFP+ Switch       128  Missing
5   1cc1de-4da900  HPE J9576A 3810-48G-4SFP+ Switch       200  Missing

Enter show oobm discovery to see if the members have been discovered using OOBM.

Viewing oobm discovery

switch#  show oobm discovery

Active Stack Fragment(discovered) IP Address : 10.0.11.49

Mbr          
ID   Mac Address   Status
--- -------------- ----------
1   1cc1de-4d87c0  Commander
2   1cc1de-4dc740  Member
3   1cc1de-4dbd40  Member

Inactive Stack Fragment(discovered) IP Address : 10.0.10.98

Mbr      
ID  Mac Address    Status
--- -------------- ----------
5   1cc1de-4da900  Commander

Member 5 is up, but is an inactive fragment. It has an addressable IP address, which can be used to connect to this fragment.

Connecting to a stack fragment

switch# telnet 10.0.10.98 oobm
HPE J9576A 3810-48G-4SFP+ Switch
Software revision KA.15.03.0000x
Copyright (C) 1991-2011 Hewlett-Packard Development Company, L.P.
RESTRICTED RIGHTS LEGEND
Confidential computer software. Valid license from HPE required for possession,
use or copying. Consistent with FAR 12.211 and 12.212, Commercial
Computer Software, Computer Software Documentation, and Technical
Data for Commercial Items are licensed to the U.S. Government under
vendor's standard commercial license.
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
20555 State Highway 249, Houston, TX 77070

Enter the show stacking command.

Viewing missing stack members

switch# show stacking

Stack  Topology      : Chain
Stack  Status        : Fragment Inactive
Uptime               : 0d 0h 7m
Software  Version    : KA.15.03.0000x

Mbr
ID  Mac Address   Model                                  Pri  Status
--- ------------- -------------------------------------- --- ---------------
1   1cc1de-4d87c0 HPE J9573A 3810-24G-PoE+-2SFP+ Switch   128  Missing
2   1cc1de-4dc740 HPE J9573A 3810-24G-PoE+-2SFP+ Switch   128  Missing
3   1cc1de-4dbd40 HPE J9575A 3810-24G-2SFP+ Switch        128  Missing
4   1cc1de-4d79c0 HPE J9576A 3810-48G-4SFP+ Switch        128  Missing
5   1cc1de-4da900 HPE J9576A 3810-48G-4SFP+ Switch        200  Commander

Confirm by entering the oobm discovery command. Member 4 is down.

Confirming stack member 4 is down

switch# show oobm discovery

Inactive Stack Fragment(discovered) IP Address: 10.0.10.98

Mbr  
ID   Mac Address   Status
--- -------------- ----------
5   1cc1de-4da900 Commander

Active Stack Fragment(discovered) IP Address: 10.0.11.49

Mbr  
ID   Mac Address   Status
--- -------------- ----------
1   1cc1de-4d87c0  Commander
2   1cc1de-4dc740  Member
3   1cc1de-4dbd40  Member