If you look further to page 201 in the description for the network / area
command........
0.0.0.0 is used to specify that the mask uses the interface address
If you look at RouterA it uses an inverse mask
network 10.0.0.0 0.255.255.255 area 0
but look at RouterB, it uses
network 10.64.0.2 0.0.0.0 area 0
now look at the interface configuration, ip address 10.64.0.2 255.255.255.0
in this case the "0.0.0.0" will be interpreted as 0.255.255.255
sort of a shortcut if the router has multiple interfaces.
Kevin Wigle
CCDA CCNA CBE CBI MCSE
----- Original Message -----
From: Field, Brian <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, 10 May, 2000 21:59
Subject: OSPF question- network statement
>
> 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
>
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