Change Notification

From CCIE Storage

Jump to: navigation, search

Change notification (SCN/RSCN) provides the service for fabrics, what LIP provides on arbitrated loops.

RSCNs are sent from N/NL Port to the fabric, and sent on the initiators who have registered to receive these notifications. This desire to receive SCNs is entered into the FCNS. When a change takes place in the fabric, those nodes that have sent RSCN's to the FCNS are made aware of the change by receiving a SCN.

The SCN does not inform the node of what actual change took place. Just that a change took place. It's up to the individual node to re-query the FCNS to see what changes have taken place.

Personal tools