Setting up TCP/IP Networking

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Setting up the Network on System V (IRIX)

The basic ideas are the same as in the BSD version but the configuration files are done differently. Under IRIX, there is a shell script /etc/init.d/network that controls all the network related setup. That shell script gets it information from some files described below.

The hostname can be defined by created a file named /etc/sys_id and placing the name of the host on a line in that file. The network script will check for that file and set the hostname.

Irix uses a file named /etc/config/netif.options to define the network interfaces available and the IP addresses associated with those interfaces. Instead of IP-addresses the interface addresses can be a hostname and IRIX will look up the IP address in the /etc/hosts file. The file /etc/config/netif.options has the format:

if1name=et0
if1addr=130.85.199.2     OR   if1addr=$HOSTNAME

To set the netmask and broadcast addresses you must define a config file for each interface under the name /etc/config/ifconfig-N.options where N is the interface number starting with 1. The contents of this file contain a single line with the netmask and broadcsat keywords, as in:

netmask 255.255.255.0 broadcast 130.85.199.255

To turn on routed for the system you must use the command
chkconfig routed on
Then upon startup, the network script will look for a file named /etc/config/routed.options. This file contains any command options you want run such as default route, etc. On our systems we just run this with the option -q to place the system in quiet mode and only listen for RIP requests. To set up a static route the routed.options file would contain the line:
add default 130.85.199.1

Edit the /etc/resolv.conf file and list the nameservers to use. The format of this file is

domain umbc.edu 
hostresorder local bind nis
nameserver 130.85.1.4
nameserver 130.85.1.5

Select the application deamons to support. On Irix, the network script automatically starts the master internet service deamon inetd which reads a file named /etc/inetd.conf. This file has a line for each application to be served by inetd.