The value of tmnxEthRingPathIfRapsCcTag specifies the member's
encapsulation.
This object must be included in the same SNMP PDU as that of the
tmnxEthRingPathRowStatus object for creation of the path. The absense
of this object will result in a NO CREATION ERROR
Once specified, the tmnxEthRingPathIfRapsCcTag can not be changed;
the row must be destroyed and re-created.