Hi all, a quick question, If I have a /24 address given to me, can I subnet this down to different networks but still be able to use the whole /24 network as well ? or wouldnt this be advisable once you have subnetted it down ?
What I think once you subnet the class then you can only use /24 for IP that does not be subnetted. Because there is more specific routes for those subnet and the remaining will fall into the /24 route (if there is).
Just as Anand said, you can use x.x.x.0/25 & x.x.x.28/25 for 2 x /25 and x.x.x.0/26, x.x.x.64/26, x.x.x.128/26 & x.x.x.192/26 for 4 x /26 subnets. But please rememeber some of the routing protocol support non-VLSM (e.g. RIP).
you are correct that is how you would do it but rememeber if this is a current network with devices addressed as a /24 you will have to go out and readdress all the clients with addresses that fall within each subnet and change the subnet mask on all devices , if you are using dhcp it will make this easier...
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