Juniper JUNOSE 11.1.X - COMMAND REFERENCE A TO M 4-9-2010 Command Reference Manual page 171

Chapter 2: A Commands
never—Indicates the router never stops accepting or generating packets; overrides
previously specified stop times and keeps using the authentication key in sending
and receiving PDUs with the corresponding authentication indefinitely
stopAcceptTime, stopAcceptMonth, stopAcceptDay, stopAcceptYear—Time, month,
day, year that the router will stop accepting packets created with this password.
Use military time format HH : MM[: SS ].
stopGenTime, stopGenMonth, stopGenDay, stopGenYear—Time, month, day, year
that the router will stop inserting this password into packets. Use military time
format HH : MM[: SS ].
Router Configuration
Mode
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area-message-digest-key