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

Latest reply: Aug 2, 2021 17:07:21 10079 32 20 0 2

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:


115019ci2y23yvp4wibx0p.jpg?1.JPG


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:


115029uki3lunn3991vivr.jpg?2.JPG


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.


115038qj0kmoev9al50crj.jpg?3.JPG


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.


115047d5fk8s5b5q6b32du.jpg?4.JPG


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.


115058qn5myam8xihyhihr.jpg?5.JPG


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

lylanadya
lylanadya Created Jun 18, 2019 05:42:36 (0) (0)
What is CCM? and what is for?  
asrul
asrul Reply lylanadya Created Jun 18, 2019 06:19:46 (0) (0)
Hi Lylanadya, the CCM is Continuous Check Messager. It acts like a ping to the devise continuously, but in a message.  
Posted by fadrul at 2019-07-22 08:11 Bidirectional Forwarding Detection (BFD) is same like LPT or LLF?
Yes, the mechanism is same
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Thanks for sharing!!
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Great sharing
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GOOD
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good info, thanx
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Great sharing
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thanks for your sharing
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The differences between Link Pass Through (LPT) and Link Loss Forwarding (LLF)-3907839-1
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Great post
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Good
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