About CLAM takeover enablement setting (CLUSTER NETWORK DEGRADED) ALERT
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.