Skip to main content
NetApp Knowledge Base

Why was a Mediator Assisted Unplanned Switchover triggered?

  1. Last updated
  2. Save as PDF
Views:
30
Visibility:
Public
Votes:
0
Category:
metrocluster
Specialty:
metrocluster
Last Updated:

Applies to

  • MetroCluster IP
  • ONTAP 9
  • Mediator Assisted Unplanned Switchover (MAUSO)

Answer

  • At the time of the switchover, both nodes at one site lost connectivity to their DR and DRAUX partners
Example:

08Jul2024 17:53:16 iscsi_session_stateChanged iscsi_session_state="Reconnecting" iscsi_target="iqn.2016-07.com.netapp:X" iscsi_target_type="dr_partner" iscsi_target_address="1.1.2.3:65200" iscsi_session_state_change_reason="Reason: session login timed out." iscsi_timeout_value="5"

08Jul2024 17:53:16 iscsi_session_stateChanged iscsi_session_state="Reconnecting" iscsi_target="iqn.2016-06.com.netapp:Y" iscsi_target_type="dr_auxiliary" iscsi_target_address="1.1.2.4:65200" iscsi_session_state_change_reason="Reason: session login timed out." iscsi_timeout_value="5"

  • The same nodes also lost access to the Mediator mailbox disks at the same time
Example:

08Jul2024 17:53:21 iscsi_session_stateChanged iscsi_session_state="Reconnecting" iscsi_target="iqn.2012-05.local:mailbox.target.X:1" iscsi_target_type="mailbox" iscsi_target_address="1.2.3.4" iscsi_session_state_change_reason="Reason: socket error 54." iscsi_timeout_value="0"

  • If a MetroCluster IP site loses both of these resources, the nodes will self-halt and the nodes at the other site will trigger a MAUSO

Additional Information

additionalInformation_text

 

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.