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Forum Replies

  1. Hi Mario,

    The first two bits have to be 10 so that means the following range is class B:

    10000000 - 10111111

    Or in decimal:

    128 - 191

    Rene

  2. Thanks Rene,

    When I configure prefix-list and use it in the distribute-list inside EIGRP configuration I notice that we have three options:

    • gateway Filtering incoming address updates based on gateway
    • in Filter incoming service updates
    • out Filter outgoing service updates
     

    The last two are clear but I did not understand the first one ? Can you explain it to me please ?

  3. Regarding the prefix that are covered in 128.0.0.0/3 & 128.0.0.0/5.
    Why does it stop at subnet #6 for /3 and #19 for /5

    256 – 224 = 32 subnets
    256 – 248 = 8 subnets

    So for /3 it looks like this:

    Subnet #1: 0.0.0.0/3
    Subnet #2: 32.0.0.0/3
    Subnet #3: 64.0.0.0/3
    Subnet #4: 96.0.0.0/3
    Subnet #5: 128.0.0.0/3
    Subnet #6: 160.0.0.0/3
    And for /5:

    Subnet #1: 0.0.0.0/5
    Subnet #2: 8.0.0.0/5
    Subnet #3: 16.0.0.0/5
    Subnet #4: 24.0.0.0/5
    Subnet #5: 32.0.0.0/5
    Subnet #6: 40.0.0.0/5
    Subnet #7: 48.0.0.0/5
    Subnet #8: 56.0.0.0/5
    Subnet #9: 64.0.0.0/5
    Subnet #10: 72.0.0.0/5
    Subnet #

    ... Continue reading in our forum

  4. Ok, Hi everyone just joined the site.

    I want to make sure that my brain understands this. It’s like you slice and dice and hopefully everything comes out right. So say I have this already as my prefix list:

    10.0.12.0/24 le 32

    Now say I want to include another network. So I want the following two networks in one prefix-list.

    10.0.12.0/24 and 10.0.13.0/24, I want these covered by one prefix list.

    So I figure that this will fit within the scope of these two networks.

    2 will be size of subnets:

    0, 2, 4, 6, 8, 10
    12 and 13 — this fits just right.
    14, 16, 18 et

    ... Continue reading in our forum

  5. I was so confused by this at first. I know its simple but its also a brain teaser for some reason.
    first I pulled up my boson subnet tool its free tool by the way on the Boson.com (just need to create an account) website. At first I was thinking that first two bits mean the first two spots _ _ thinking it could be anything from 0 to 192 that it did not matter if it was a zero or a one. However after putting into the subnet calculator it helped me to see.

    The next really helpful thing for me was when I went ahead and enabled the command with distribute-

    ... Continue reading in our forum

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