Dell PowerSwitch S4820T 9.50.1 Configuration Guide for the S4820T System - Page 911
Recover from Stack Link Flaps, Recover from a Card Problem State on an S-Series Stack
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Recover from Stack Link Flaps S-Series 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 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 and power-cycle the stack STANDBY UNIT 10:55:18: %STKUNIT1-M:CP %KERN-2-INT: Error: Stack Port 50 has flapped 5 times within 10 seonds.Shutting down this stack port now. 10:55:18: %STKUNIT1-M:CP %KERN-2-INT: Error: Please check the stack cable/module and power-cycle the stack MEMBER 2 Error: Stack Port 51 has flapped 5 times within 10 seconds.Shutting down this stack port now. Error: Please check the stack cable/module and power-cycle the stack. Recover from a Card Problem State on an S-Series 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 an S-Series Stack - Different Dell Networking OS Versions stack-1#show system brief Stack MAC : 00:01:e8:8a:fd:6e Reload Type : normal-reload [Next boot : normal-reload] -- Stack Info -- Unit UnitType Status ReqTyp CurTyp Version Ports 0 Standby card problem S4810 unknown 64 1 Management online S4810 S4810 8-3-10-223 64 2 Member not present 3 Member not present 4 Member not present 5 Member not present Stacking 911
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