AIX 5L Problem Determination - IBM Redbooks

If you are using the route command to change the routing table on your machine
and you want this change to be permanent, insert the appropriate line in the
/etc/rc.net file.
8.2.1 Dynamic or static routing
If you have a problem with the dynamic routing protocol, follow the procedure
provided in this section.
If your system is set up to use the routed daemon:
1. Check if the routed daemon is running; if not, start it with the startsrc -s
routed command.
2. If routed cannot identify the route through queries, check the /etc/gateways
file to verify that a route to the target host is defined and that the target host is
running the RIP.
3. Make sure that gateways responsible for forwarding packets to the host are
up and that they are running the RIP (routed or gated active). Otherwise you
will need to define a static route.
4. Run the routed daemon with the debug option to log information such as bad
packets received. Invoke the daemon from the command line using the
following command:
startsrc -s routed -a "-d"
5. Run the routed daemon using the -t flag, which causes all packets sent or
received to be written to standard output. When routed is run in this mode, it
remains under the control of the terminal that started it. Therefore, an
interrupt from the controlling terminal kills the daemon.
If your system is set up to use the gated daemon:
1. Check if gated is running; if not, start it with the startsrc -s gated command.
2. Verify that the /etc/gated.conf file is configured correctly and that you are
running the correct routing protocols.
3. Make sure that the gateway on the source network is using the same protocol
as the gateway on the destination network.
4. Make sure that the machine that you are trying to communicate with has a
return route back to your host machine.
You should set static routes under the following conditions:
► The destination host is not running the same protocol as the source host, so it
cannot exchange routing information.
184 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques