NOTICE: fp(xx): Not enough memory to service RSCNs for 0 ports, continuing (Doc ID 2436153.1)

Last updated on JUNE 14, 2019

Applies to:

Symptoms

The following notices are observed in /var/adm/messages :

As we can see from the above, this condition is taking place on multiple HBA ports or fp instances, indicating a state change took place in the Fibre Channel SAN switch. RSCN is a Fibre Channel specification term, which stands for Registered State change Notification. RSCNs are sent by the SAN switch to initiators whenever a major fabric changes take place. Such changes include a node (other initiator or target in a zone) is logging in or logging out of the switch, ISL (Inter Switch Link) changes in a multi-switch fabric configuration, or any configuration changes on the switch.. It is important to note that RSCNs are not generated if a storage ports is logged in with the switch, and there is a change in the lun presentation, such as LUNs added or deleted.

Changes

The above condition shows that RSCNs are being sent to the initiator by storage ports that are in the same zone with the initiator, but the storage ports are not presenting any LUN, or possibly not allowing the host to discover any LUNs (due to LUN security or LUN permission). So, if the host/initiator does not have an IT nexus established for a "NOT CONNECTED" port, then obviously it will not have enough memory allocated for it.

Cause

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