Summary

Amendment 2 to Recommendation ITU-T G.8032/Y.1344 provides a revised Appendix XI, which addresses situations in which an Ethernet service that traverses an Ethernet ring protection (ERP) protected ring may start and end outside that ring. In order to provide full service protection, three options are described in this appendix. One is an interaction between ITU-T G.8032/Y.1344 and ITU-T G.8031/Y.1342, a second is the usage of a modified sub-ring, and a third is the insertion of a non-ERP node in the ERP protected ring.