The value of tmnxEthTunnelHoldDownTimeMember specifies the time, in
centiseconds, used for the hold-timer for associated Continuity Check
(CC) Session down event dampening. This guards against reporting
excessive member operational state transitions.
This is implemented by not advertising subsequent transitions of the
CC state to the Ethernet Tunnel Group until the configured timer has
expired.
A value of zero (0) specifies that a down transition is reported
immediately.