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RE: (ASCEND) how to calculate the 'ascend' netmask
FYI This is found in RFC1878. Please note that a /31 is not usable as
it has no host components. To amplify on Stephen's list, this gives you
a complete subnet chart for ipv4:
Mask value: # of
Hex CIDR Decimal addresses Classfull
80.00.00.00 /1 128.0.0.0 2048 M 128 A
C0.00.00.00 /2 192.0.0.0 1024 M 64 A
E0.00.00.00 /3 224.0.0.0 512 M 32 A
F0.00.00.00 /4 240.0.0.0 256 M 16 A
F8.00.00.00 /5 248.0.0.0 128 M 8 A
FC.00.00.00 /6 252.0.0.0 64 M 4 A
FE.00.00.00 /7 254.0.0.0 32 M 2 A
FF.00.00.00 /8 255.0.0.0 16 M 1 A
FF.80.00.00 /9 255.128.0.0 8 M 128 B
FF.C0.00.00 /10 255.192.0.0 4 M 64 B
FF.E0.00.00 /11 255.224.0.0 2 M 32 B
FF.F0.00.00 /12 255.240.0.0 1024 K 16 B
FF.F8.00.00 /13 255.248.0.0 512 K 8 B
FF.FC.00.00 /14 255.252.0.0 256 K 4 B
FF.FE.00.00 /15 255.254.0.0 128 K 2 B
FF.FF.00.00 /16 255.255.0.0 64 K 1 B
FF.FF.80.00 /17 255.255.128.0 32 K 128 C
FF.FF.C0.00 /18 255.255.192.0 16 K 64 C
FF.FF.E0.00 /19 255.255.224.0 8 K 32 C
FF.FF.F0.00 /20 255.255.240.0 4 K 16 C
FF.FF.F8.00 /21 255.255.248.0 2 K 8 C
FF.FF.FC.00 /22 255.255.252.0 1 K 4 C
FF.FF.FE.00 /23 255.255.254.0 512 2 C
FF.FF.FF.00 /24 255.255.255.0 256 1 C
FF.FF.FF.80 /25 255.255.255.128 128 1/2 C
FF.FF.FF.C0 /26 255.255.255.192 64 1/4 C
FF.FF.FF.E0 /27 255.255.255.224 32 1/8 C
FF.FF.FF.F0 /28 255.255.255.240 16 1/16 C
FF.FF.FF.F8 /29 255.255.255.248 8 1/32 C
FF.FF.FF.FC /30 255.255.255.252 4 1/64 C
FF.FF.FF.FE /31 255.255.255.254 2 1/128 C
FF.FF.FF.FF /32 255.255.255.255 This is a single host route
Best regards,
David Van Allen - FASTNET(tm) / You Tools Corporation
dave@fast.net (888)321-FAST(3278) http://www.fast.net
FASTNET - Business and Personal Internet Solutions
>-----Original Message-----
>From: Stephen Fisher [SMTP:lithium@cia-g.com]
>Sent: Thursday, September 18, 1997 12:00 PM
>To: Thilo Wunderlich
>Cc: ascendlist
>Subject: Re: (ASCEND) how to calculate the 'ascend' netmask
>
>
>255.255.255.0 /24
>255.255.255.128 /25
>255.255.255.192 /26
>255.255.255.224 /27
>255.255.255.240 /28
>255.255.255.248 /29
>255.255.255.252 /30
>255.255.255.254 /31
>255.255.255.255 /32
>
>On Mon, 15 Sep 1997, Thilo Wunderlich wrote:
>
>> I can't find it in the max4000 manual:
>> How do I calculate the 'ascend' netmasks ?
>> Instead of 255.255.255.x /xx is used.
>>
>> Thilo
>> --
>> thilo@vossnet.de Thilo Wunderlich Voss Net GmbH
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>> To get FAQ'd: <http://www.nealis.net/ascend/faq>
>>
>
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