The value of tmnxWlanGwSoftGreIfShapingType specifies
the granularity of the egress shaping
for Soft GRE on this group interface.
The value of this object can only be modified
while the value of tmnxWlanGwSoftGreIfAdminState
is equal to 'outOfService'.
The value 'perTunnel' specifies that a separate shaper is applied
to each Soft GRE tunnel; the value 'perRetailer' specifies that a separate
shaper is applied to each retailer Mobile Network Operator's fraction of the
Soft GRE tunnel payload.