Christoffer Pio wrote:
Is it not possible to subnet a C class into 3 nets, like
0-63 64-191 <-- Offending network (?) 192-255
If so, why is this?
I think you got explanations on the why.
Now it should still be possible to subnet the way you want I think.
While I would never recommend it, think routing should go with the most significant mask for a given address.
So if you subnet:
1) x.x.x.0/26 2) x.x.x.192/26 3) x.x.x.0/24
you should be able to do the trick.
An address in the range 0-63 will match both mask 1) and 3) but mask 1) is most significant (more bits, higer value) so the packet will be routed to subnet 1).
Same thing for a packet in the range 192-255, with subnet 2) and 3), it will be router to subnet 2).
And a packet in the range 64-191 will only match the subnet 3) so it will go to the subnet 3).
IF I AM NOT WRONG, this should work, but it is definitely nasty.
If you absolutely need 2 subnets of 64 addresses and one of 128, doing:
1) x.x.x.0/26 2) x.x.x.64/26 3) x.x.x.128/25
is nicer and will result in the ranges 0-64, 64-127 and 128-255.
Yes, but any host in the 64-191 range will need to be configured with a /24 net mask *and* have static routes for 0-63 and 192-255. And I'm not even completely sure that will work.
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