jgd@pollux.UUCP (Dr. James George Dunham) (07/29/87)
We have a host of machines that are currently connected via an ethernet using network address 180.0 . All the machines support the Bsd 4.2 UNIX style remote commands, shells and logins. We would like to extend our ethernet to communicate with another group of machines. They want to have a seperate network address of 192.0 and again use the Bsd 4.2 UNIX type of commands. I ran a test and there was no problems in doing this over one ethernet. The problem I have is how to communicate between the two networks. I put both networks hosts address in /etc/hosts yet they apparently did not recognize the other network. When I tried telnet and ftp, they told me the network was unreachable when I tried to access a machine from the other network. My first question is how do I access the other network sharing the same ethernet. My second question is if I can somehow access the other network, can I get the usual Bsd 4.2 UNIX type of remote commands? -Jim Dunham jgd@pollux
hedrick@topaz.rutgers.edu (Charles Hedrick) (08/06/87)
You asked how to put two networks on one Ethernet. You need to use a variant of "route add" to tell your machine that the other network is present. Assume that the other network is 192.13.2.0. You would say route add 192.13.2.0 `/bin/hostname` 0 The hop count of 0 says that the network specified is directly connected. Note that you have to put the command in /etc/rc.local for every machine on your network. Machines on the other network of course get a command that points at your network. I note that your network addresses seem a bit odd. 180.0 is certainly a legal class B network number, but it has not been allocated. You don't just make up network numbers: they are allocated by the Network Information Center. SMU is quite likely to be connected to the rest of the Internet at some point, if it isn't already. When that happens, if you are using random addresses, other sites are likely to get quite upset at you. It's better to start out with officially allocated numbers from the beginning, since otherwise you'll have to change all your addresses, which is a painful process. To start the process for having a network number assigned, send mail to registrar@sri-nic.arpa.