Entries used for providing transmit side
WRED information. If this entry got deleted,
the corresponding cewredConfigGlobIndex
(identified by cewredTxValue) associated entry
in cewredConfigGlobTable is also deleted.
If a entry corresponding to the value of
cewredTxValue does not exist in the
cewredConfigGlobTable, the value of
cewredTxValue can be (re)used as an index to
create a new entry in the
cewredConfigGlobTable for building association
between this mapping table and the
cewredConfigGlobTable.