Administrator Guide

2 1 up AC up NA
2 2 absent absent NA
3 1 absent absent 0
3 2 up AC up 7888
-- Fan Status --
Unit Bay TrayStatus Fan1 Speed Fan2 Speed
------------------------------------------------------------------------------------
2 1 up up 6956 up 7058
3 1 up up 7058 up 7164
Speed in RPM
DellEMC#
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.
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 aps ve times within 10
seconds.
Dell EMC Networking OS displays console messages for the local and remote members of a apping link, and on the primary (master) and
standby management units as KERN-2-INT messages if the apping port belongs to either of these units.
In the following example, a stack-port on the master aps. 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 oending unit.
Example of Console Messages About Flapping Link
DellEMC#00:42:46: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down:
2/54
00:42:48: %S3148P:4 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 4/53
00:42:48: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 2/54
00:42:48: %S3148P:4 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down: 4/53
00:42:48: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down: 2/54
00:42:52: %S3148P:4 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 4/53
00:42:52: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 2/54
00:42:53: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down: 2/54
00:42:53: %S3148P:4 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down: 4/53
00:42:55: %S3148P:4 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 4/53
00:42:55: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_UP: Changed stack port state to up: 2/54
00:42:56: %S3148P:2 %IFAGT-5-STACK_PORT_LINK_DOWN: Changed stack port state to down: 2/54
Recover from a Card Problem State on a Stack
If a unit added to a stack has a dierent Dell EMC Networking OS version, the unit does not come online and Dell EMC Networking OS
cites a card problem error.
To recover, disconnect the new unit from the stack, change the Dell EMC Networking OS version to match the stack, and then reconnect
it to the stack.
914
Stacking