Encapsulation mode of a service instance. none : Invalid value. default : Match packets by the default criteria which matches packets that do not match any other service instance. It is supported when the encapDefault field of h3cEvcCapabilities is set. untagged : Match untagged packets. It is supported when the encapUntagged field of h3cEvcCapabilities is set. tagged : Match all tagged packets. It is supported when the encapTagged field of h3cEvcCapabilities is set. svlanIdList: Match packets by SVLAN ID list and untagged packets if PVID of the port is in SVLAN ID list, the SVLAN ID list is denoted by h3cEvcSrvInstSvlanIdListLow and h3cEvcSrvInstSvlanIdListHigh. It is supported when the encapSvlanId or encapSvlanIdList field of h3cEvcCapabilities is set. Only a VLAN ID is supported when the encapSvlanId field of h3cEvcCapabilities is set. svlanIdListOnlyTagged: Match only tagged packets by an SVLAN ID list, the SVLAN ID is denoted by h3cEvcSrvInstSvlanIdListLow and h3cEvcSrvInstSvlanIdListLow. It is supported when the encapSvlanId (or encapSvlanIdList) and encapSvlanIdOnlyTagged fields of h3cEvcCapabilities are set. Only a VLAN ID is supported when the encapSvlanId and encapSvlanIdOnlyTagged field of h3cEvcCapabilities are set. svlanIdCvlanId: Match packets by an SVLAN ID and a CVLAN ID. The SVLAN ID is denoted by h3cEvcSrvInstSvlanIdListLow or h3cEvcSrvInstSvlanIdListHigh. The CVLAN ID is denoted by h3cEvcSrvInstCvlanIdListLow or h3cEvcSrvInstCvlanIdListHigh. It is supported when the encapSvlanIdCvlanId field of h3cEvcCapabilities is set. svlanIdCvlanIdList: Match packets by an SVLAN ID and a CVLAN ID list. The SVLAN ID is denoted by h3cEvcSrvInstSvlanIdListLow or h3cEvcSrvInstSvlanIdListHigh. The CVLAN ID list is denoted by h3cEvcSrvInstCvlanIdListLow and h3cEvcSrvInstCvlanIdListHigh. It is supported when the encapSvlanIdCvlanIdList field of h3cEvcCapabilities is set. svlanIdCvlanIdAll: Match packets by an SVLAN ID and all CVLAN IDs. The SVLAN ID is denoted by h3cEvcSrvInstSvlanIdListLow or h3cEvcSrvInstSvlanIdListHigh. The CVLAN ID includes all VLAN IDs. It is supported when the encapSvlanIdCvlanIdList field of h3cEvcCapabilities is set. cvlanIdList: Match packets by CVLAN ID list. The CVLAN ID list is denoted by h3cEvcSrvInstCvlanIdListLow and h3cEvcSrvInstCvlanIdListLow. It is supported when the encapCvlanId or encapCvlanIdList field of h3cEvcCapabilities is set.