Turning Off ICMP Router Discovery

For reasons involving router reliability, you might not want your hosts to use RDISC. If the automatic selection of RIP rather than RDISC by a host is to work reliably, the routers in the network (particularly those running RDISC) must also work reliably.

If your routers are not running RDISC and you install a single Solaris router, by default all hosts connected to that router rely on it alone. To have the hosts on that network use the other routers as well, turn off RDISC on the new router.

Turning Off ICMP Router Discovery Task Map

Table 6-5 Turning Off ICMP Router Discovery Task Map

Task	Description	For Instructions, Go To ...
Turn off ICMP router discovery on the host.	Involves changing the name of the host's in.rdisc file.	"netmasks Database"
Turn off ICMP router discovery on the router.	Involves changing the name of the router's in.rdisc file.	"What Is Subnetting?"

How to Turn Off ICMP Router Discovery on the Host

1. Become superuser on the host.

2. Change the name of the host's /usr/sbin/in.rdisc to some other name, such as /usr/sbin/in.rdisc.saved.

3. Reboot the host.

How to Turn Off ICMP Router Discovery on the Router

1. Become superuser on the router.

2. Change the name of the router's /usr/bin/in.rdisc file to some other file name.

3. Reboot the router.