>In the ACRC book (page 200), the author shows the 10.64.0.1/24
>network being placed into an area 0 with the command:
>
> network 10.64.0.1 0.0.0.0 area 0
>
>Why is the wild card mask 0.0.0.0 used and not a mask
>which matches the actual manner in which the network
>has been subneted? Is there any difference to the operation
>of the router, area, OSPF, or area routing if the above was
>changed to:
>
> network 10.64.0.1 0.0.0.255 area 0
>
>?
>
>If the above two forms result in identical operation,
>why is the wild card mask required?
>
>Thanks,
>Brian
>
By making the mask specific enough to match the router interface
only, it makes troubleshooting and maintenance easier. While it is
possible to have masks that meet multiple router interfaces, my
experience tells me that configurations are most clear if there is
1:1 correspondence between network statements and OSPF-speaking
router interfaces.
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