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  1. Hi,

    I think there is a mistake in the second line in

    R1(config-router)#network 172.16.0.0 
    R1(config-router)#network 172.16.12.0
    

    It should be “network 192.168.12.0” instead right ?

  2. Hi Rene

    I was thinking in order to fix this sub-optimal routing problem of Router R2, why not use the same summarization for the Gi0/2 on R1?
    Please let me know if this would be a solution to this problem.

    Thanks
    Palani

  3. Palani,
    Your solution would work. What you propose doing would be essentially to suppress all specific /24 routes, and only advertise the /16 summary both to R3 and R2. In this case, since the prefix lengths are the same, R2 would fall back using the lowest metric to get to the summary, which for RIP would simply be hop count. R2 would choose the direct connection to R1.

  4. Houari,
    You are correct. I will request that this get corrected. Thanks for point this out.

  5. Hello Chandrasekhar

    The auto-summary command restores the default auto summarization behaviour of the routing protocol. RIP Version 1 always uses automatic summarization. If you are using RIP Version 2, you can turn off automatic summarization by specifying the no auto-summary command. Disable automatic summarization if you must perform routing between disconnected subnets. When automatic summarization is off, subnets are advertised. Note that this is

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