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Black Box Console Server user guide 253
•if your network is congested, subnet it with a bridge; however, bear in mind the
recommendations in the previous paragraph.
Host problems
Cannot access a host by name
•if using DNS or if DNS is required, ensure a nameserver is configured on your
unit and is accessible (ping it).
•if not using DNS, ensure 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
ensure:
•the network address is correct.
•the subnet mask is set correctly and reflects the network configuration.
•the broadcast address is set correctly and reflects the network configuration.
Cannot access a host on a remote network
•use the show route command to verify that there is a route to the remote host. If
no gateway is specified, ensure a default gateway is specified. Ping the
default gateway to check if it is working.
•Consider the situation beyond the gateway; e.g. are intermediate gateways and
the remote host available? Also, check the messages returned by the
show route command; e.g. that a particular host or gateway is unreachable.
Gateways added into the gateway table are ignored by the unit
•have you used BOOTP and entered a single static gateway in the bootptab file
entry? If yes, the other gateways will be ignored. See Appendix F BOOTP
for more information