Skip to main content
NetApp Knowledge Base

About CLAM takeover enablement setting (CLUSTER NETWORK DEGRADED) ALERT

Views:
729
Visibility:
Public
Votes:
0
Category:
fas-systems
Specialty:
hw
Last Updated:

Applies to

  • FAS2552
  • FAS2554
  • ONTAP 8.3.2P5

Issue

  • Cluster ports e0e/e0f links flap or go down at the same time.

Example:

[ltm_services: snmp.link.down:info]: Interface 3 is down.
[ltm_services: netif.linkDown:info]: Ethernet e0e: Link down, check cable.
[pmcsas_timeout_0: sas.adapter.debug:info]: params: {'debug_string': 'Link down too long ... offlining', 'adapterName': '0b'}
[ltm_services: snmp.link.down:info]: Interface 4 is down.
[ltm_services: netif.linkDown:info]: Ethernet e0f: Link down, check cable.

 

If the ports do not come back up and if Connectivity, Liveliness and Availability Monitor(CLAM) is enabled.

  • An out of quorum panic will occur on one of the nodes.
Example:
 
PANIC : Received PANIC packet from partner, receiving message is (Coredump and takeover initiated because Connectivity, Liveliness and Availability Monitor (CLAM) has determined this node is out of quorum.
 
  • The node that panics will be taken over and the surviving node will be serving all data.
If the ports do not come back up and if Connectivity, Liveliness and Availability Monitor(CLAM) is NOT enabled.
  • There will not be a takeover and both nodes will go out of quorum. Neither node will be serving data.

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.

 

  • Was this article helpful?