This bitmask indicates the level of end to end protection required. A value of zero (no bits set) indicates that any protection may be used. The following describes these bitfields: unprotected This flag is set to indicate that the LSP should not use any protection. fullReroute This flag is set to indicate that the protecting LSP creation only when protected (primary) LSP fails. rerouteWitoutExtraTraffic This flag is set to indicate that protecting LSP shall not carry traffic other than that of Primary LSP. In this case protecting LSP is usually not configured in the data plane before protected LSP failure. dedicatedOneToOne This flag is set to indicate that a dedicated LSP protection scheme, i.e., 1:1 protection, should be used to support the LSP. dedicatedUniOnePlusOne This flag is set to indicate that a dedicated LSP protection scheme, i.e., 1+1 protection, should be used to support the LSP. It is used for protecting uni-directional tunnel and No additional signalling is required for switching from one LSP to another in case of failure and recovery dedicatedBiOnePlusOne This flag is set to indicate that a dedicated LSP protection scheme, i.e., 1+1 protection, should be used to support the LSP. It is used for protecting bi-directional tunnel and additional signalling is required for switching from one LSP to another in case of failure and recovery.