Troubleshooting guide

Troubleshooting TCP/IP
5-83
2. The default route entry should specify the router that has the route to the
remote host. If there is no default route entry, use the route add default
command at the UNIX prompt to manually configure the default gateway:
unix-host% route add default <ip-address> <n>
where:
ip-address is the IP address of the default gateway (the router local to the
host).
n indicates the number of hops to the specified gateway.
Incomplete DNS Host Table
If the Domain Name Server (DNS) receives a lookup request for a host name that
is not in its cache, it cannot reply to the request, and the client cannot establish a
connection.
Follow these steps to complete the DNS host table:
1. Enter the following host command at the UNIX prompt:
unix-host% host <ip-address>
where:
ip-address is the IP address of a server, router, or other network node.
2. If a
Host not found message displays, but you can open the connection
using the host’s IP address rather than its name, try connecting to other hosts
using their names. If you can open connections to other hosts using their
names, the host table might be incomplete. Add hostname-to-address
mappings to the DNS cache for every host on the network.
3. If any connections cannot be opened using host names, the DNS might not be
running. Refer to DNS Not Running, for more troubleshooting information.
Note: You may need to reboot the host for this change to take effect.