Setting tmnxChassisModeForce to a value of 'doAction' in the
same SNMP SET request where tmnxChassisAdminMode is set to 'modeB'
allows the chassis to be upgraded to 'modeB' even if there are 
IOM cards in the chassis with a value of 'iom-20g' for
tmnxCardAssignedType.
        
Setting tmnxChassisModeForce to a value of 'doAction' in the
same SNMP SET request where tmnxChassisAdminMode is set to 'modeC'
allows the chassis to be upgraded to 'modeC' even if there are
IOM cards in the chassis with a value of 'iom2-20g' for
tmnxCardAssignedType.           
 
An attempt to set tmnxChassisModeForce to 'doAction' without
also setting tmnxChassisAdminMode, in the same SNMP SET request 
will fail with an inconsistentValue error.
       
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      Mode change   | Assigned card | Force   |  Result
-----------------------------------------------------------------------
a to b (upgrade)  |    iom-20g    | not-set |  error
a to b (upgrade)  |    iom-20g    |   set   |  mode b with warnings
a to b (upgrade)  |    iom-20g-b  | not-set |  mode b
a to b (upgrade)  |    iom-20g-b  |   set   |  mode b
a to c (upgrade)  |    iom-20g    | not-set |  error
a to c (upgrade)  |    iom-20g    |   set   |  mode c with warnings
a to c (upgrade)  |    iom2-20g   | not-set |  mode c
a to c (upgrade)  |    iom2-20g   |   set   |  mode c
b to c (upgrade)  |    iom-20g-b  | not-set |  error
b to c (upgrade)  |    iom-20g-b  |   set   |  mode c with warnings
b to c (upgrade)  |    iom2-20g   | not-set |  mode c
b to c (upgrade)  |    iom2-20g   |   set   |  mode c
b to a (downgrade)|    iom-20g    | not-set |  mode a on save and reboot
b to a (downgrade)|    iom-20g    |   set   |  mode a on save and reboot
b to a (downgrade)|    iom-20g-b  | not-set |  mode a on save and reboot
b to a (downgrade)|    iom-20g-b  |   set   |  mode a on save and reboot
c to a (downgrade)|    iom-20g    | not-set |  mode a on save and reboot
c to a (downgrade)|    iom-20g    |   set   |  mode a on save and reboot
c to a (downgrade)|    iom2-20g   | not-set |  mode a on save and reboot
c to a (downgrade)|    iom2-20g   |   set   |  mode a on save and reboot
c to b (downgrade)|    iom-20g-b  | not-set |  mode b on save and reboot
c to b (downgrade)|    iom-20g-b  |   set   |  mode b on save and reboot
c to b (downgrade)|    iom2-20g   | not-set |  mode b on save and reboot
c to b (downgrade)|    iom2-20g   |   set   |  mode b on save and reboot
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