vtpVlanEditIsCRFBackup 1.3.6.1.4.1.9.9.46.1.4.2.1.17

True if this VLAN is of type trCrf and also is acting as a backup trCrf for the ISL distributed BRF. This object is only instantiated when the value of the corresponding instance of vtpVlanEditType has a value of tokenRing(3).