On Monday 03 November 2003 17:28, Gregoire Huet wrote:
> stuff 0.0.1.64 255.255.255.128 128 30 128 128 Some other
This can't be correct. Lets calculate the network and the broadcast address
from this subnet.
We need a BIT AND Operation with a Netmask.
Network Address
0.0.1.64 = Binary 00000000.00000000.00000001.01000000
255.255.255.128 = Binary 11111111.11111111.11111111.10000000
---------------------------------------------------------------------------
0.0.1.0 = Binary 00000000.00000000.00000001.00000000
Here we need an BIT OR with a Hostmask.
Broadcast Address
0.0.1.64 = Binary 00000000.00000000.00000001.01000000
0.0.0.127 = Binary 00000000.00000000.00000000.01111111
---------------------------------------------------------------------------
0.0.1.127 = Binary 00000000.00000000.00000001.01111111
As you can see, 0.0.1.64 can never be a network address for 255.255.255.128.
I suggest allways to take the bigger network first (if it is possible):
Like the example from Jerome.
0.0.0.0 255.255.255.128 128 30 128 128 Some stuff
0.0.0.128 255.255.255.128 128 120 128 128 Some other stuff
0.0.1.0 255.255.255.128 128 64 128 128 Some other different stuff
0.0.1.128 255.255.255.192 64 30 64 64 Some different stuff
0.0.1.192 255.255.255.192 64 20 40 64 Some usual stuff
0.0.2.0 255.255.255.128 128 20 50 100 Some other usual stuff
As far as I remember there is an allocation rule. First year 50% second year
75%.
Cheers
Erich
--
* Erich Hohermuth IP Engineer - SolNet (AS 9044) PGPKEY-46A08FCB *
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