Troubleshooting
Problem
In the Events of the Cloud Pak System or IBM Cloud Pak Software instance, the following message is observed:
CWZIP1200E Unable to communicate with the virtual management software using IP address <nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn>
Symptom
You observe the following message when reviewing the events on your device or software instance:
CWZIP1200E Unable to communicate with the virtual management software using IP address <nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn>
Cause
This message is a warning event, indicating that there was a loss of communications between the PSM management software and the virtualization management software running on one of the compute nodes.
See the documentation in the IBM Knowledge Center at this link: CWZIP1200E
Diagnosing The Problem
Check the following:
- Look at the 'count' on the event - verify whether it was raised once or many times
- Note the date and time the event was last recorded
- Find the serial number of the Compute Node associated with the IP address indicated at the end of the CWZIP1200E event message:
- Go to System > System troubleshooting > Click "Collect system logs..." > In the list, select "System Health Check", then click "Submit".
- Once the "System Health Check" is generated, download the resulting .tgz file.
- Unpack the "System Health Check" archive and find the compute node configuration details in the file
Health_YY-MM-DD.HH.MM.SS.tgz\Health_YY-MM-DD.HH.MM.SS.tar\config\compute_nodes_resolved.json
- Within that file, search on the IP address from the event. You find data for the related Compute Node similar to the following:
{
"compute_nodes": "/admin/resources/compute_nodes/nnnnn-nnnn-nnn-nnnnn",
"created_time_raw": 1563445757341,
"hardware": "T",
"rack_unit_number": 0,
"rack_number": "8283/NNNNNNN",
"node_bay_number": 4,
"mm_bay_number": 0,
"width": 1,
"state": "available",
"label_text": "Rack 8283/NNNNNNN Chassis 1 Node Bay 4",
"drive_bay_number": 0,
"ipaddress": "nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn:nnnn",
"type": "compute_node",
"label_key": "pure4504",
"updated_time": "Thu 02 Apr 2020 00:07:41.942 UTC",
"version": "2.3.1.1",
"id": "/admin/resources/locations/936f71f2-5a96-4481-9d05-a6d19849b332",
"physical_location": "n/a",
"height": 0,
"updated_time_raw": 1585786061942,
"parent_type": "compute_nodes",
"name": "SN#NNNNNNN",
"io_bay_number": 0,
"chassis_number": 1,
"created_time": "Thu 18 Jul 2019 10:29:17.341 UTC"
}
], - Note the value in the "name" field - it is the serial number of the Compute Node that uses the IP address indicated in the event message.
- Verify the date of any recent hardware repairs for the Compute Node with the serial number from step 3.5.
Resolving The Problem
If
- The CWZIP1200E event occurred only one time recently
and
- The date / time of the event matches the date of a recent repair action involving the Compute Node serial number you found in step 3.5 of the "Diagnosing the Problem" section
then, no further action is necessary.
The event was properly raised when the Compute Node was shut down and powered off for the repair action. The management software on the PSM would lose connectivity to the virtual management software running on the Compute Node until that Compute Node could be successfully powered on.
Document Location
Worldwide
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Product Synonym
PureApplication;PureApp;ICPS;Cloud Pack System;PureApplication System
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Document Information
Modified date:
06 May 2020
UID
ibm16151455