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From: scottp@se-sd.SanDiego.NCR.COM (Scott Platenberg)
Newsgroups: comp.protocols.tcp-ip
Subject: subnetting
Summary: mixing 8-bit & 0-bit mask hosts
Message-ID: <4492@se-sd.SanDiego.NCR.COM>
Date: 19 Mar 91 03:09:32 GMT
Reply-To: scottp@se-sd.SanDiego.NCR.COM (Scott Platenberg)
Organization: NCR Corp., Systems Engineering - San Diego
Lines: 25


  I am trying to build up a case for proper coordination of subnet
masks on hosts and gateways in a medium sized network.  There is a 
central router which employs the 8-bit subnet mask connecting 8 physical
nets in a class B network.  Some hosts on the segments have 8-bit
subnet masks and others do not.  The network functions with this hodge-podge
config, but when I want to further subnet off one of the segments I run
into problems that I feel are attributed to the subnet config.  When this
further segmented net tries to reach hosts on the segment which it has the
direct connection to it fails if the host is not using the subnet mask. 

  What are some other specific reasons for not having hosts on the same
network have different subnet masks?  Also, what problems may arise
if there is a gateway with one interface using masking and the
other interface not?  
  If you feel this discussion is inappropriate for the group, please
email.  Thanks.

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