Nortel NN46225-300 Fundamentals page 77

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If you are using SNMPv3, verify the following:
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Copyright © 2005-2007, Nortel Networks
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Is the switch turned on?
Does the switch have an incorrect IP address?
Is the incorrect IP address specified in the Open Device field in Java
Device Manager?
Is the network misconfigured?
Is the encryption module correctly loaded on the switch?
Is the user login and password correct?
Is the authentication protocol and password correct?
Is the privacy protocol and password correct?
Nortel Metro Ethernet Routing Switch 8600
Fundamentals — Using Device Manager
NN46225-300 02.02 Standard
4.2 1 October 2007
Switch fails to open in Device Manager 77