The value of tmnxEthTunnelApsCommandSwitch specifies the switch
command to initiate on an Ethernet Tunnel APS Group.
When read, this object returns the last command written or 'noCmd (0)'
if no command has been written to this Ethernet Tunnel APS Group since
initialization. The return of the last command written does not imply
that this command is currently in effect. This request may be preempted
by a higher priority local or remote request. In order to determine the
current state of the group it is necessary to read the objects
tmnxEthTunnelApsRxPdu and tmnxEthTunnelApsTxPdu.
The value 'noCmd (0)' may not be used in a write command.
The value 'clear (1)' clears all the switch commands listed below for
the specified member. In addition, if tmnxEthTunnelRevertTime is a
non-zero value (revertive mode) the active WTR (Wait To Restore) state
is also cleared.
The value 'lockoutOfSecondary (2)' prevents the primary (working)
member from switching to the secondary (protection) member. The
specified member should be the secondary member index, otherwise an
inconsistentValue error is returned.
The value 'forceSwitchPrimaryToSecondary (3)' switches the primary
member to the secondary member. If the secondary member is specified an
inconsistentValue error is returned.
The value 'manualSwitchPrimaryToSecondary (4)' switches the specified
primary member ot the secondary member. If the secondary member is
specified an inconsistentValue error is returned.
The value 'exercise (5)' exercises the protocol for a protection switch
of the specified member by issuing an Exercise request for that member
and checking the response on the APS member.