Multiple subnets on a single ethernet. Related to routes.

[Chris Brown <CBROWN@ssnet.com>]

     I have been doing a bit of planning related to subnetting a 
class C for our ehternet.  One of the problems that I ran into was 
that if I used RIP the entire network had to be on the same 
subnetmask, since RIP doesn't deal with subnet masks.  This was a 
real pain since I have a couple of machines that will need to have 
alliased addresses (WWW and FTP servers) and they will each use up a 
large portion of a subnet each if masked as 255.255.255.240.

     What complications occur if a particular machine has a single IP 
address and needs to communicate with a machine on a different 
subnet even though they share a single ethernet.  I have done this 
before by manually adding the routes to the routing table but the 
connections seam extremely slow in establishment.  Once the 
connection is made everything seams to be ok but the broadcast 
addresses are obviously out of different blocks which may be causing 
problems.  Theoretically it shouldn't be a problem but practice can 
be a different thing all together.


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