TCP/IP and subnets

[Chris Lindblad <cjl%life.ai.mit.edu@RELAY.CS.NET>]

    Date: Tue, 25 Apr 89 16:29:44 EDT
    From: jfh@cs.brown.edu

    I am trying to configure the TCP/IP software on my 3670. Our campus has a 
    backbone (128.148.0.0), which leads to a gateway (128.148.128.194), whose other
    side is our local network (128.148.194.0). Picture:

    128.148.0.0
    ================================|=================
				    |
				    | 128.148.128.194
				   [ ] Gateway
				    | 128.148.194.1
	    128.148.194.0		|
	  --------------------------------------------------|
							    |
					    128.148.194.2	|
					    Lisp Machine   [ ]
   
       Our namespace tells the 3670 that its IP address is 128.148.194.2, and
    that the gateway is 128.148.194.1, and provides gateway service, and many
    things work fine -- if we want to talk to someone at 10.0.0.51, it works. But
    to talk to someone at 128.148.183.6, for example, we lose, because the 3670
    thinks it's on network 128.148.0.0 (or so it says when we Peek at the
    networks). It sends out the packet on its own interface, rather than through
    the gateway, and nothing happens. The problem is that we are a class B subnet,
    but the TCP/IP software seems to think we are not. Does anyone know a fix?

Put this namespace USER-PROPERTY on your NETWORK INTERNET namespace object:

USER-PROPERTY INTERNET-SUBNET-MASKS (("128.148.0.0" "255.255.255.0"))