I have been using EXOS release 188.8.131.52 for a while to test ring topologies and G.8032 with full satisfaction.
Now, I'm involved with a multi-ring scenario (main-ring+sub-ring) where I'd like to provide protection of the sub-ring against double faults in case of loss of connectivity between major ring and sub-ring according to the description in supplement 52 to ITU-T G.8032.
The supplement states: "the first step in minimizing the segmentation effect is to identify that the major ring is currently disconnected from the sub-ring...For this one can use a unicast UP MEP (as defined in [IEEE 802.1ag]) from the sub-ring port of the interconnected node to the sub-ring port of the other interconnection node. This can use the VID used by the major ring R-APS channel with a higher MEL or use any one VID that is controlled by the major ring protection mechanism...".
I've tried with a simplified ring topology like the one represented in the above supplement and several different configurations of the UP MEP but the protection is not correctly working yet: in case of UP MEP DOWN the sub-ring is switched to protection and its port belonging to the interconnection node is blocked instead of being unblocked.
Has anyone already tried such a configuration?
Any suggestions on the above is welcome.
Thank you in advance,