Original Posting: Dear all,
I am trying to find the source of C0 error at the console. From what I know, this is a communication error to workstation. The 8-port ethernet switch on the console had died and I replaced it. I see power for all the ports now, but it still is not connecting to the workstation. All the green lights are flashing on the 8-port switch on the console. I tried reinstalling diskless and it doesn't seem to fix this either.
Occasional green and yellow lights flash on the ethernet port on the back of workstation (It's HP X1100 workstation running Redhat Linux).
Any suggestions to try is greatly appreciated.
Thank You.
Gopal Subramaniam
SOLUTION: The replacement switch from Amazon marketplace vendor was the culprit. The power lights came on and it deceived me by thinking it was a good one. Ultimately, an 8-port switch from a local store solved the problem.
Suggestions from the community that are good check points to try and solve the issue.
1. Check the output for hostname, hostname -f, hostname -vf. What do you receive as answer if you type in a terminal
hostname (<-- should display the hostname e.g. nmrpc)
hostname -f (<-- should display the "full qualified name" e.g. nmrpc.lab.company.de)
hostname -vf (<-- should display the "full qualified name" and the answer of an IP-Address request)
1. Check the powering sequence. Sometimes it can be console first and then computer OR vice versa.
2. From the description, this looks more like an IPSO related issue. Did you consult the IPSO manual ? Also, if you are familiar with it, you can connect a laptop to the ethernet switch inside the console and try to run a packet sniffer such as 'wireshark', which is open source and runs on all platforms. If there is a communication issue between the HP PC and IPSO, this is perhaps the best way to catch it.
3. The first thing and most straight forward and fastest thing to try is to connect a different ethernet cord from IPSO to computer.
On the switch, all the lights blinking in unison? Perhaps your replacement is not working.
Another possibility is that the ethernet board on the computer is having a problem.
If you don't have a spare card, then there is a way, in software, to switch ports (assuming that you have two ethernet ports).
1. Be sure to address whether or not the switch has any firewall limitations or priorities on it. You will see activity on the ports, but that doesn't mean any data is getting through...
One other possible thing; is the host configured to communicate on a specific gateway/port?
1. Telnet spect to see if the communication works
2. type 'ha' on the command line
Dr. Gopal Subramaniam
Tel: 718-997-4123
Dept of Chemistry and Biochemistry
Queens College - CUNY
Flushing, NY 11367
Received on Mon Feb 10 2020 - 11:46:40 MST