Administrator Guide

Stack MAC : 00:21:22:23:24:25
Reload-Type : normal-reload [Next boot : normal-reload]
-- Stack Info --
Unit UnitType Status ReqTyp CurTyp Version Ports
------------------------------------------------------------------------------------
1 Standby online S3048-ON S3048-ON 9.8(0.0P2) 52
2 Management online S3048-ON S3048-ON 9.8(0.0P2) 52
3 Member not present S3048-ON
4 Member not present
5 Member not present
6 Member not present
NOTE: Each unit in the stack has a stack number that is either assigned by you or Dell EMC Networking OS. To manually
renumber stack members, use the stack-unit old-unit-number renumber new-unit-number command.
Renumbering stack members causes the entire stack to reload.
Removing Front End Port Stacking
To remove the configuration on the front end ports used for stacking, use the following commands.
1. Remove the stack group configuration that is configured.
CONFIGURATION mode
no stack-unit id stack-group id
2. Save the stacking configuration on the ports.
EXEC Privilege mode
write memory
3. Reload the switch.
EXEC Privilege mode
reload
After the units are reloaded, the system reboots. The units come up as standalone units after the reboot completes.
Troubleshoot a Stack
To troubleshoot a stack, use the following recovery tasks.
● Recover from Stack Link Flaps
● Recover from a Card Problem State on a Stack
Recover from Stack Link Flaps
Stack link integrity monitoring enables units to monitor their own stack ports and disable any stack port that flaps five times
within 10 seconds.
Dell EMC Networking OS displays console messages for the local and remote members of a flapping link, and on the primary
(master) and standby management units as KERN-2-INT messages if the flapping port belongs to either of these units.
In the following example, a stack-port on the master flaps. The remote member, Member 2, displays a console message, and the
master and standby display KERN-2-INT messages.
To re-enable the downed stack-port, power cycle the offending unit.
Example of Console Messages About Flapping Link
---------------------MANAGMENT UNIT------------------------------
Error: Stack Port 50 has flapped 5 times within 10 seconds.Shutting down this st
ack port now.
Error: Please check the stack cable/module and power-cycle the stack.
10:55:20: %STKUNIT1-M:CP %KERN-2-INT: Error: Stack Port 50 has flapped 5 times w
ithin 10 seconds.Shutting down this stack port now.
10:55:20: %STKUNIT1-M:CP %KERN-2-INT: Error: Please check the stack cable/module
Stacking
833