What is the difference between TNL failure and IPPM failures?

Hello Experts.
What is the difference between TNL failure and IPPM failures?

Anyone with good and simple answer? :wink:

TNL as in Transport Network Layer?

If so, TNL is the transmission MO itself, you presumably can’t have services without it.

IP PM (Performance Monitoring) is a feature, optional.

Not necessarily for Huawei, since TNL will also count for RRU hardware failures, transceiver, fiber…

TNL can also cover misconfiguration on RAN .
If ip to UGW is not configured on eNodeB, you get TNL failures.
(Vendor Huawei)