> 
> What is the rule for supernetting 2-3 subnets to appear as one single
> block.
> 
> e.g  I have 4 subnets of 192.168.1.0 giving 4 subnets each with 62 usable
> hosts on each subnet. Can I joing the last three subnets to make it appear
> as one. Will doing that will save me 4 IPs and I will be only wasting 2 for
> those subnets (broascast and network). 
> 
> 192.168.1.0  255.255.255.192   (subnet 1)
> 192.168.1.?  255.255.255.?       (subnet 2 after joining 2,3 and 4)
> 
> (I am joining the last three so giving total 2 subnets with 62 hosts on the
> first one and 192-2=190 hosts on the last one ?). What would be mask and
> network address of the last one and what routes should be used ?
> 
> Thanks,
> 
> Irfan Akber

RFC 1878 has the details.  


--bill
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