Brian,
In OSPF, the network statement activates OSPF routing on the
interfaces that match the address + mask combination. The
wildcard mask DOES NOT have to match the subnet masks used
on interfaces.
Consider the following config:
int e0
ip addr 10.64.0.1 255.255.255.128
int e1
ip addr 10.64.0.129 255.255.255.128
router ospf 1
<network statements here>
'network 10.64.0.1 0.0.0.0 area 0' only activates OSPF on e0
and not e1.
'network 10.64.0.1 0.0.0.255 area 0' activates OSPF on BOTH
e0 AND e1.
HTH,
Scott
"Field, Brian" wrote:
>
> 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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>> Scott F. Robohn, CCSI #20826, CCNP/CCDA.........703-623-3752 <<
>> Chesapeake Network Solutions.............mailto:[EMAIL PROTECTED] <<
>> mentor:technologies................mailto:[EMAIL PROTECTED] <<
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