Zoning is the most common management activity in a SAN. When nodes are zoned into small, granular groupings, the occurrences of disruptive RSCNs are virtually eliminated. However, since that time most HBA vendors have addressed the issues. When this disruption was more common, that is, with older Host Bus Adapter (HBA) drivers, RSCNs gained an undeserved negative reputation. This is important for non-disruptive fabric operations, because RSCNs have the potential to disrupt storage traffic. RSCNs are managed by the fabric Name Server and notify end devices of events in the fabric, such as a storage node or a switch going offline.īrocade isolates these notifications to only the zones that require the update, so nodes that are unaffected by the fabric change do not receive the RSCN. Zoning not only prevents a host from unauthorized access of storage assets, but it also stops undesired host-to-host communication and fabric-wide Registered State Change Notification (RSCN) disruptions. Nodes can be members of multiple zones - allowing for a great deal of flexibility when you implement a SAN using Zoning.
Zoning creates a situation in which nodes can communicate with each other only if they are members of the same zone. Zoning is a fabric-based service in the Storage Area Networks that groups host and storage nodes that need to communicate. Best practices for Zoning on Brocade switches.
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