I have a setup with a dark fiber (STM-16) and a couple of STM-1s via a thirdpart SDH networ between two ONS15454E.
I know how to create a SNCP protected STM-1 circuit across the STM-16 and a STM-1 if they are directly connected, but what if one of the paths between the two SDH nodes are running via a thirdparty network and SDH overhead bytes are not transmitted via this circuit, hence I can't create a normal DCC connection across this STM-1?
Hope someone can direct me in a usefull direction.
I am not certain but I believe you need to create an Open-ended SNCP Circuit. The term "Open-ended" refers to the fact that one path of the SNCP's is not reachable via DCC connection.
You might review the following procedure:
NTP-D358 Create an Automatically Routed Open-Ended SNCP High-Order Circuit
I hope this helps.