Installing and Administering LAN/9000 Software

70 Chapter4
Troubleshooting LAN/9000
Troubleshooting Q & A
In general, the short term average load on an IEEE802.3/Ethernet LAN
should not exceed more than 70% of the total bandwidth of the LAN.
When it does exceed 70% of the total bandwidth, network performance
begins to degrade due to an increase in collisions and deferred
transmissions. When it consistently exceeds 70% of the total bandwidth,
you may need to reconfigure the systems on your LAN. If you notice
throughput/performance degradation on your system, contact your local
HP Representative for additional assistance and consultation.
“No such interface”: After I booted my Series 800 Model E, I found
that networking failed. I found the following error in the
/var/adm/rc.log file:
ifconfig lan0: no such interface
How do I resolve this problem?
Answer: This problem is caused by the LAN driver software disabling
the LAN card because it was not connected to the LAN, or the LAN was
down. Use lanadmin to reset the LAN card and run ifconfig to bring
the card up.
“No such interface”: When I configure an interface, ifconfig returns
the error “no such interface.” What should I do?
Answer: The numeric portion of the interface name is incorrect. Run the
lanscan command to obtain a list of interface names.
“Plumbing error”: When I configure an interface, ifconfig returns a
“Plumbing error” message. What should I look for?
Answer: The interface name specified in the ifconfig run string is not
defined in the /dev directory or is not a streams driver. The network
device files /dev/ip and /dev/tcp are not defined.
Can’t communicate outside local supernet: I recently tried to set up
a supernet on my LAN. The systems in the supernet can communicate
with one another, but they cannot communicate with systems outside the
supernet.
Answer: Check the routing table on your system and the node you want
to communicate with. If the system you want to communicate with does
not support supernetting, you will have to configure a network route for
each of the networks in the supernet. If the system you want to
communicate with supports supernetting, you will only need to add a
network route for the supernet.