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  1. Hi Rene,

    thanks a lot for your helpful explanation, I simulated your lab and found something that I need your explanation for it.

    when I leaked at R4, R2 calculated the metric of with 168 as below:

    R2#sh ip route isis 1
 is subnetted, 1 subnets
    i ia [115/168] via, 00:14:47, Ethernet0/2

    although R4 calculated it with 30 :

    R4#sh ip route isis
 is subnetted, 1 subnets
    i L2 [115/30] via, 00:50:55, Ethernet0/1

    the metric calculated with 40 at R2 when I configured the

    ... Continue reading in our forum

  2. Hi Walid,

    That’s a good question. I just booted this topology again and I see a metric of 40 on R2:

    R2#show ip route isis                         
    Gateway of last resort is to network
    i*L1 [115/10] via, 00:14:23, GigabitEthernet0/2
 is subnetted, 1 subnets
    i ia [115/40] via, 00:14:23, GigabitEthernet0/2
    i L1 [115/20] via, 00:15:16, GigabitEthernet0/1
    i L1 [115/30] via, 00:15:10, GigabitEthernet0/1
    i L1
    ... Continue reading in our forum

  3. Hi Rene,


    this command result:

    R1 uses R3

    Why do you write:

    R1 uses R2

  4. Hi Rene
    why we will configure on R4 , not on R2 , is there a reason or first level-1-2 router

  5. When do we use route map and distribute list ?? What are the peculiarities of both?? Can you please distinguish between access list and prefix list also??

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