The differences between Link Pass Through (LPT) and Link Loss Forwarding (LLF)

Hi there, everybody!

This post emphasizes the differences between Link Pass Through (LPT) and Link Loss Forwarding (LLF). Please see more details below.

BACKGROUND INFORMATION

The LPT takes place between the Transmission sink and source, while LLF is between Client to Client:

NETWORK SCENARIO FOR LPT

Below is the network scenario for LPT.

When there's a fiber cut at Link B, Link B is faulty, while Link A is active:

NETWORK SCENARIO FOR LLF

Below is the network scenario for LLF.

When there's a fiber cut at Link B, Link B is faulty, while Link A is inactive.

NETWORK SCENARIO FOR LPT AT Link A AND LLF AT Link B

Below is the network scenario for LPT at Link A and LLF at Link B.

When there's a fiber cut at Link B, Link B is faulty, while Link A is inactive.

NETWORK SCENARIO FOR LLF AT Link A AND LPT AT Link B

Below is the network scenario for LLF at Link A and LPT at Link B.

When there's a fiber cut at Link B, Link B is faulty, while Link A is active.

This would be all on the differences between Link Pass Through (LPT) and Link Loss Forwarding (LLF). Thanks for reading this post!