[comp.protocols.tcp-ip] Subnet Mask Problems

todd@janus.Quotron.com (Todd Booth) (02/13/90)

Hi netWorkers,

It appears that a lot of TCP/IP software out there does not fully
support subnetting.  Is this true?  I'd like to use the last 6 bits
for host addresses and therefore the netmask is 0xffffffc0.  This
would translate the ip address 130.224.4.78 into:

net:  130.224.4.64
host:   0.000.0.14
------------------
      130.224.4.78, right?

But when I set up my routing tables with 

route add net 130.224.4.64 130.224.4.78 0

lots of TCP/IP software has trouble.  The software appears to assume that
a subnet can't use any of the last 8 bits.
 
--todd 

ps. I can't wait to get back on internet (estimated date - next week).