HP Comware 5 Debug Manual Vol 2

debugging vty
Use debugging vty to enable VTY debugging.
Use undo debugging vty to disable VTY debugging.
Syntax
debugging vty { fsm | negotiate }
undo debugging vty { fsm | negotiate }
Views
User view
Parameters
fsm: Telnet state machine debugging.
negotiate: VTY option debugging.
Examples
# Enable VTY option debugging.
<Sysname> debugging vty negotiate
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