HP 6125G Command Reference Manual page 80

The Fail timer value must be greater than or equal to three times the Hello timer value.
Examples
# Set the Hello timer value to 2 seconds and the Fail timer value to 7 seconds.
<Sysname> system-view
[Sysname] rrpp domain 1
[Sysname-rrpp-domain1] timer hello-timer 2 fail-timer 7
75