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

Latest reply: Jul 22, 2019 16:11:38 497 12 12 2

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

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Below is the network scenario for LPT:

When fiber cut at the Link B, the Link B is faulty while the Link A is active.

115029uki3lunn3991vivr.jpg?2.JPG



Below is the network scenario for LLF:

When fiber cut at the Link B, the Link B is faulty while the Link A is inactive.

115038qj0kmoev9al50crj.jpg?3.JPG



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

When fiber cut at the Link B, the Link B is faulty while the Link A is inactive.

115047d5fk8s5b5q6b32du.jpg?4.JPG




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

When fiber cut at the Link B, the Link B is faulty while the Link A is active.

115058qn5myam8xihyhihr.jpg?5.JPG


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lylanadya Created Jun 18, 2019 13:42:36
What is CCM? and what is for?  
asrul Reply lylanadya Created Jun 18, 2019 14:19:46
Hi Lylanadya, the CCM is Continuous Check Messager. It acts like a ping to the devise continuously, but in a message.  
Vijay24 Created Jun 18, 2019 11:57:16 Helpful(0) Helpful(0)

Great and detailed sharing
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Albertpr Created Jun 18, 2019 11:57:43 Helpful(0) Helpful(0)

Great sharing. Diagram is very useful and easy to understand.
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JesseYu Admin Created Jun 18, 2019 12:09:30 Helpful(0) Helpful(0)

So clear and helpful
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Jali Created Jun 18, 2019 12:12:13 Helpful(0) Helpful(0)

So clear with diagram
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SteveShim Created Jun 18, 2019 12:20:50 Helpful(1) Helpful(1)

Hi Asrul the expert,

what if we implement both LPT and LLF?

Thanks

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One for All and All for One !
yjhd Created Jun 18, 2019 13:32:39 Helpful(0) Helpful(0)

thanks for your sharing
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najib Created Jun 18, 2019 13:50:19 Helpful(1) Helpful(1)

This is what i'm looking for!
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Be the very best of you
asrul Created Jun 18, 2019 14:21:51 Helpful(1) Helpful(1)

Posted by SteveShim at 2019-06-18 12:20 Hi Asrul the expert, what if we implement both LPT and LLF?Thanks
Hi Steve, good question. When we implemented both LPT and LLF, the result is just like we implement the LLF only.
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LinKeng Created Jun 18, 2019 15:02:55
good, very clear answer  
fadrul Created 2 days 16:11 Helpful(0) Helpful(0)

Bidirectional Forwarding Detection (BFD) is same like LPT or LLF?
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