i have three stack cisco switches 2960 and i added a stand alone  cisco 2960 and i took two uplink from those stack switches which is port channel suddenly my whole internet goes down and when i remove the uplink i got internet back. 

IOS for the current software version and whether this can be upgraded to the latest compatible versionIf it can be upgraded, let us know to which version and the IOS for the compatible versionupdraging steps for two switch.now the switch is running c...

need to know how to create a username and password for nx-os 9000

we have same 6 WS-C2960X-24TD-L switch which is in stack. in these 6 switch one of the switch is master with high priority configured 15. other 5 switch is member. if the master switch got faulty we know that another switch will take care the master ...

we are having a problem in WS-C2960X-48FPD-L when i am trying to enter in the privilege mode its showing % Error in authentication through console and shh.please note: we dont configure the tacacs