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 the link between member 3 and 4 fails, a stack split will occur with an active fragment on members 1-2-3 and an inactive fragment on members 4 and 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 10.0.102.173. Once logged on, enter the
show stack command.
Viewing stacking member status before split
switch# show stack
Stack ID : 02009418-82db0080
MAC Address : 941882-db0089
Stack Topology : Chain
Stack Status : Active
Split Policy : One-Fragment-Up
Uptime : 0d 0h 5m
Software Version : WC.16.04.0000x
Mbr
ID Mac Address Model Pri Status
--- ----------------- ------------------------------------- --- ----------
*1 941882-db0080 Aruba JL321A 2930M-48G Switch 128 Commander
2 941882-dc05c0 Aruba JL322A 2930M-48G-PoE+ Switch 128 Member
3 941882-dc9340 Aruba JL322A 2930M-48G-PoE+ Switch 128 Member
4 941882-dccf80 Aruba JL320A 2930M-24G-PoE+ Switch 128 Member
5 941882-dd3480 Aruba JL320A 2930M-24G-PoE+ Switch 128 Standby
Viewing stacking member status after split
switch# show stack
Stack ID : 02009418-82db0080
MAC Address : 941882-db0089
Stack Topology : Chain
Stack Status : Fragment Active
Split Policy : One-Fragment-Up
Uptime : 0d 0h 7m
Software Version : WC.16.04.0000x
Mbr
ID Mac Address Model Pri Status
--- ----------------- ------------------------------------- --- ---------------
1 941882-db0080 Aruba JL321A 2930M-48G Switch 128 Commander
*2 941882-dc05c0 Aruba JL322A 2930M-48G-PoE+ Switch 128 Member
3 941882-dc9340 Aruba JL322A 2930M-48G-PoE+ Switch 128 Standby Booting
4 941882-dccf80 Aruba JL320A 2930M-24G-PoE+ Switch 128 Missing
5 941882-dd3480 Aruba JL320A 2930M-24G-PoE+ Switch 128 Missing
switch# show stack
Stack ID : 02009418-82db0080
MAC Address : 941882-dd34a2
Stack Topology : Chain
Stack Status : Fragment Inactive
Split Policy : One-Fragment-Up
Uptime : 0d 0h 7m
Software Version : WC.16.04.0000x
Mbr
ID Mac Address Model Pri Status
--- ----------------- ------------------------------------- --- ---------------
1 941882-db0080 Aruba JL321A 2930M-48G Switch 128 Missing
2 941882-dc05c0 Aruba JL322A 2930M-48G-PoE+ Switch 128 Missing
3 941882-dc9340 Aruba JL322A 2930M-48G-PoE+ Switch 128 Missing
4 941882-dccf80 Aruba JL320A 2930M-24G-PoE+ Switch 128 Missing
*5 941882-dd3480 Aruba JL320A 2930M-24G-PoE+ Switch 128 Commander
Enter
show oobm discovery to see if the members have been discovered using OOBM.
Viewing oobm discovery
Switch# show oobm discovery Active Stack Fragment(local) IP Address : 10.0.102.173 Mbr Mac Address Status ID --- ------------------ ---------- 1 941882-d83c40 Commander 2 941882-d91a40 Member 3 941882-d9a240 Member Inactive Stack Fragment(discovered) IP Address : 10.0.102.114 Mbr Mac Address Status ID --- ------------------ ---------- 5 941882-d9e900 Commander 4 941882-da0f40 Member Switch# show oobm discovery Inactive Stack Fragment(local) IP Address : 10.0.102.114 Mbr Mac Address Status ID --- ------------------ ---------- 5 941882-d9e900 Commander 4 941882-da0f40 Member Active Stack Fragment(discovered) IP Address : 10.0.102.173 Mbr Mac Address Status ID --- ------------------ ---------- 1 941882-d83c40 Commander 2 941882-d91a40 Member 3 941882-d9a240 Member
Members 4 and 5 are 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 10.0.102.162 oobm
Aruba JL320A 2930M-24G-PoE+ Switch
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Press any key to continue
Enter the
show stacking
command.
Viewing missing stack members
switch# show stacking
Stack ID : 02009418-82db0080
MAC Address : 941882-dd34a2
Stack Topology : Chain
Stack Status : Fragment Inactive
Split Policy : One-Fragment-Up
Uptime : 0d 0h 9m
Software Version : WC.16.04.0000x
Mbr
ID Mac Address Model Pri Status
--- ----------------- ------------------------------------- --- ---------------
1 941882-db0080 Aruba JL321A 2930M-48G Switch 128 Missing
2 941882-dc05c0 Aruba JL322A 2930M-48G-PoE+ Switch 128 Missing
3 941882-dc9340 Aruba JL322A 2930M-48G-PoE+ Switch 128 Missing
4 941882-dccf80 Aruba JL320A 2930M-24G-PoE+ Switch 128 Missing
5 941882-dd3480 Aruba JL320A 2930M-24G-PoE+ Switch 128 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(local) IP Address : 10.0.102.162 Mbr Mac Address Status ID --- ------------------ ---------- 5 941882-dd3480 Commander Active Stack Fragment(discovered) IP Address : 10.0.102.218 Mbr Mac Address Status ID --- ------------------ ---------- 1 941882-db0080 Commander 2 941882-dc05c0 Member 3 941882-dc9340 Member