I want to summarize three addresses within an OSPF area:
10.2.1.0/24
10.2.2.0/24
10.2.3.0/24
Converting to binary, I see the 15th bit is the highest order bit the three
addresses have in common. From that I see the summary address is 10.2.0.0.
What I don't understand is why the subnet mask is 16bits. To me it looks
like it should be 15.
Thanks,
Steve
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