Dell CX4 manual Using Worldwide Port Name Zoning, Port Worldwide Names in a SAN Environment

Zoning automatically and transparently enforces access of information to the zone devices. More than one PowerEdge cluster configuration can share Dell/EMC storage system(s) in a switched fabric using Fibre Channel switch zoning and with Access Control enabled. By using Fibre Channel switches to implement zoning, you can segment the SANs to isolate heterogeneous servers and storage systems from each other.

Using Zoning in SAN Configurations Containing Multiple Hosts

Using the combination of zoning and Access Control in SAN configurations containing multiple hosts, you can restrict server access to specific volumes on a shared storage system by preventing the hosts from discovering a storage volume that belongs to another host. This configuration allows multiple clustered or nonclustered hosts to share a storage system.

Using Worldwide Port Name Zoning

PowerEdge cluster configurations support worldwide port name zoning.

A worldwide name (WWN) is a unique numeric identifier assigned to Fibre Channel interfaces, such as HBA ports, storage processor (SP) ports, and Fibre Channel to SCSI bridges or storage network controllers (SNCs).

A WWN consists of an 8-byte hexadecimal number with each byte separated by a colon. For example, 10:00:00:60:69:00:00:8a is a valid WWN. Using WWN port name zoning allows you to move cables between switch ports within the fabric without having to update the zones.

Table 3-1 provides a list of WWN identifiers that you can find in the Dell/EMC cluster environment.

Table 3-1. Port Worldwide Names in a SAN Environment

Identifier	Description
xx:xx:00:60:69:xx:xx:xx	Dell/EMC or Brocade switch
xx:xx:xx:00:88:xx:xx:xx	McData switch
50:06:01:6x:xx:xx:xx:xx	Dell/EMC storage processor
xx:xx:00:00:C9:xx:xx:xx	Emulex HBA ports
xx:xx:00:E0:8B:xx:xx:xx	QLogic HBA ports (non-embedded)
xx:xx:00:0F:1F:xx:xx:xx	Dell 2362M HBA port

Preparing Your Systems for Clustering

43