Each row entry represents a MCM in a chassis in the 7710 system.
Entries in the table cannot be created and deleted via SNMP SET
operations. When a tmnxChassisEntry is created, a
tmnxMcmEntry is created in the chassis. Before a
tmnxChassisEntry can be deleted, each tmnxMcmEntry
for the chassis must be in the proper state for removal.