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Basic question on choosing P nodes for FRR

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Beginner

Hi,

I've had below topology:

 

111.png

So from RT1's perspective, if link RT1 - RT5 is the link to be protected, the P-space (RT1, Redlink) will be RT2?

 

I can see the definition of P space of RT1 is the set of nodes that RT1 can reach as per pre-convergence without using the link protected.

 

But not sure if the high cost between RT1 and RT2 will make any difference. 

 

Much appreciate if someone could comment on this please.

 

Reagrds

 

Eason 

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