Lab 3 Task 4.12

I am using ver 4.11.

When I summarize the loopback address on the fa0/0 interface with the following command, why do I get a route in the routing tables of the routers on this segment instead of a route?

ip summary-address eigrp 10

I've tried to logically figure it out bit-wise, but it doesn't make sense to me.


  • Acer0001,

    When you summarize to /23, the first 23 bits are the summary: The 3rd octet is 00001000 (8). In order to have a 9 in the third octet (00001001), you would need a 24-bit summary (/24). Both and fall within the /23 summary.

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