JNCIP ISIS suboptimal routing

wrbuttwrbutt Registered Users Posts: 2 ■□□□□□□□□□
i am facing suboptimal routing between L1 router which is R7 in my case and R3 and R4 are other extrema.

R7---R6--R5--R4
R7---R1--R2--R3

I want to ask which link should be in L1 and which would be in L2 so that i cant face suboptimal routing.

Regards,
Waqas
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