>Please ask your customers on which method they prefer. Both methods and >all three path identification have been developed and deployed. We are >only describing how protocols suppose to work, not mandating customer >requirements. I am not sure I agree with you. IESG has repeatedly asked for a single mandatory method. Otherwise IETF RFCs become an archive for peoples implementations. For proof just look at PWE3 ATM-ENCAP draft. Thanks, Shahram > >If you have questions on protocol detail issues, please forward them to >the MPLS list. > >Thanks! > >- Ping > >> Hi, >> >> Also Facility back-up and Detour both do protection. Which >> one must be implemented to comply with this draft? For >> interoperability reasons it seems that one of them should be >> Mandatory and the other one Optional. >> >> Thanks, >> Shahram Davari >> >