Server User Manual

Troubleshooting 411
Host Problems
Host Problems
Cannot access a host by name:
z If using DNS or if DNS is required, ensure a nameserver is configured on your IOLAN and is
accessible (ping it).
z If not using DNS, verify that the host is configured in the Host Table. Check access to the host
by pinging it using the host’s IP address.
Cannot access a host on a local network, verify:
z The network address is correct.
z The subnet mask is set correctly and reflects the network configuration.
z The broadcast address is set correctly and reflects the network configuration.
Cannot access a host on a remote network:
z Use the show route command to verify that there is a route to the remote host. If no gateway is
specified, verify that a default gateway is specified. Ping the default gateway to check if it is
working.
z Consider the situation beyond the gateway; for example, are intermediate gateways and the
remote host available? Also, check the messages returned by the
ping command; for example,
that a particular host or gateway is unreachable.
Gateways added into the gateway table are ignored by the IOLAN:
z Have you used BOOTP and entered a single static gateway in the bootptab file entry? If yes, the
other gateways will be ignored.
Access to host lost after a few minutes.
z If the route to this host goes through routers, make sure those routers are all sending RIP packets
across the networks.
RADIUS Authentication Problems
User is waiting up to 60 seconds before login is accepted or denied and Authentication is set to
RADIUS. User has entered
User Name and Password, and has pressed Enter.
z Check RADIUS configuration of primary and secondary authentication/accounting hosts
specified, if you have retry and timeout values greater than the default, the IOLAN will be
spending time trying each of these hosts and keeping the user waiting.
z Adjust RADIUS configuration: specify just one host, reduce Timeout and Retry values to the
default or less than default.
You cannot progress beyond the login and password prompts when authentication is set to
RADIUS:
z On the RADIUS host, check the secret (password), you should see it displayed in clear text in the
RADIUS clients file. If you are unsure whether it is the same secret which you entered in the
IOLAN, go to the IOLAN and re-enter a new secret.
z On the RADIUS host, verify that there is only one entry for a particular user; do not have
multiple entries of the same user name (even if the passwords are different).