Correcting a No connection state for a managed system
The No connection state can occur when the HMC is not connected, or the connection with the managed system failed.
About this task
Procedure
- Obtain the IP address for the managed system's service
processor by performing the following steps.
- On the HMC, right-click the desktop and select terminal > xterm. The restricted shell command line interface opens.
- At the terminal, issue the command:
lssysconn -r all
Information similar to the following is displayed:resource_type=sys,type_model_serial_num=9117-570*100729E,sp=unavai lable,ipaddr=10.0.0.247,alt_ipaddr=unavailable,state=No Connection,conne ction_error_code=Connecting 0000-0000-00000000
- At the terminal, issue the ping command to the address of the
failing system. In the previous example, you would type:
ping 10.0.0.247
.
- Choose from the following options:
- If the ping test is successful,
perform the following steps:
- If your system is equipped with a control panel, ensure that
there are no steady (nonscrolling) reference codes displayed on the
panel.Note: A steady reference code might indicate a hardware problem. Contact your next level of support or your hardware service provider.
- Restart the HMC. For instructions about restarting the HMC, see Shutting down, restarting, logging off, and disconnecting the HMC.
- If restarting the HMC does not resolve the problem, contact your next level of support or your hardware service provider.
- If your system is equipped with a control panel, ensure that
there are no steady (nonscrolling) reference codes displayed on the
panel.
- If the ping test is not successful,
perform the following steps:
- If your system is equipped with a control panel, ensure that
there are no steady (nonscrolling) reference codes displayed on the
panel.Note: A steady reference code might indicate a hardware problem. Contact your next level of support or your hardware service provider.
- If your system has a control panel, check to see if the power light is on.
- Choose from the following options:
- If there is power to the managed system, go to step 5.
- If there is no power to the managed system, see HMC and system power-on and power-off procedures. After the power is restored, wait 5 minutes for the service processor to restart and the HMC to re-establish contact. If the system is equipped with redundant service processors, allow up to 20 minutes for this step.
- If your system is equipped with a control panel, ensure that
there are no steady (nonscrolling) reference codes displayed on the
panel.
- Verify physical network connectivity by
performing the following steps:
- Verify that the HMC and the service processor are correctly connected to your Ethernet network.
- Verify that Ethernet link status is good on all network segments which exist between the HMC and the managed system.
- If you think the network might be the problem, connect a cable
from the HMC to
the service processor and try pinging the failing system. Then choose
from the following options:
- If the ping is successful, replace the cables the way they were and correct the network problem. After the network problem is resolved, repeat this entire procedure.
- If the ping is not successful, replace the cables the way they were and continue with step 5.d.
- Reset the service processor. See Resetting the service processor.
- If the problem is not resolved by any of the above steps, contact your next level of support or your hardware service provider.