This may be a noob question, but I just can't seem to figure it out. So I have been assigned a /26 by the ISP. ISP can't or wont subnet it further for me. I can subnet this further using "Subnetting a subnet" and carve out 4 x /28's. But I get lost here... For now, there is no routing requirements between the subnets but that might change in the future. Also the primary gateway IP exists on the original /26 and will remain that way. How and what device (inexpensive/cost effective way) do I use as so far firewalls have failed me trying to configure this, Router, RouterOS, something else? I need to be able to get each /28 on its own ether interface, the primary gateway will belong to the same subnet (I understand that) but I can't seem to figure out what device to use in front of the firewall to put in the 4 x /28 subnets and configure routing so everything goes out from .1 on the original /26. Please help. Thanks.
Example (ISP Provided Subnet):
Subnet ID: 100.25.80.0/26
Broadcast: 100.25.80.63
Host Range: 100.25.80.1 - 100.25.80.62
Gateway: 100.25.80.1
Subnetted by me: 100.25.80.0/28 ; 100.25.80.16/28 ; 100.25.80.32/28 ; 100.25.80.48/28
Now 1st subnet will have the routable gateway IP of .1 but then subnet 2, 3, 4 will need to have their own gateways of .17 , .33 and .49. Offcourse they will be on my end, so all this needs to be defined somewhere in someway so that device can route traffic to .1 on the first subnet.
OR am i thinking this all wrong?
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