Users Guide
Dell#
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 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
Dell#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 different Dell Networking OS version, the unit does not come online and Dell Networking OS cites a card
problem error.
To recover, disconnect the new unit from the stack, change the Dell Networking OS version to match the stack, and then reconnect it to
the stack.
Example of Card Problem Error on a Stack - Different Dell Networking OS Versions
Dell#show system brief
Stack MAC : 34:17:17:18:19:1e
Reload-Type : normal-reload [Next boot : normal-reload]
-- Stack Info --
Unit UnitType Status ReqTyp CurTyp Version Ports
------------------------------------------------------------------------------------
1 Management online S3148P S3148P 1-0(0-4679) 54
2 Standby online S3148P S3148P 1-0(0-4679) 54
3 Member not present S3124F
4 Member card problem S3148P unknown
5 Member not present S3124
6 Member not present S3124
7 Member not present S3124P
832
Stacking