HP A7533A - Brocade 4Gb SAN Switch Base, Administrator'S Manual

Page: 236 / 576

234 Administering advanced zoning
To list the commands associated with zoning, use the
zoneHelp
command. For detailed information on
the zoning commands used in the procedures, see the Fabric OS Command Reference or the online man
page for each command.
NOTE: The information in this chapter applies to Brocade Native mode only. For information about
zoning in InteropMode 2 or 3, see Chapter 12, ” Interoperability for merged SANs ” on page 291.
Zone types
Table 57 summarizes the types of zoning available.
Fabric OS has several types of zones that do not behave like the “regular” zones described here. These
special zones include the following:
• broadcast zones
• traffic isolation zones
• QoS zones
• redirection zones
For more infrmation about special zones see ” Broadcast zones ” on page 241, ” Traffic Isolation Routing ” on
page 339, ” QoS: SID/DID traffic prioritization ” on page 361, and Chapter 12, ” Interoperability for
merged SANs ” on page 291.
Table 58 lists the various approaches you can take when implementing zoning in a fabric.
Table 57 Types of zoning
Zone type Description
Storage-based Storage units typically implement LUN-based zoning, also called LUN masking .
LUN-based zoning limits access to the LUNs on the storage port to the specific WWN
of the server HBA. It is needed in most SANs. It functions during the probe portion of
SCSI initialization when the server probes the storage port for a list of available LUNs
and their properties. The storage system compares the WWN of the requesting HBA to
the defined zone list, and returns the LUNs assigned to the WWN. Other LUNs on the
storage port are not made available to the server.
Host-based Host-based zoning can implement WWN or LUN masking.
Fabric-based Fabric switches implement fabric-based zoning, in which the zone members are
identified by WWN or port location in the fabric. Fabric-based zoning is also called
name server-based or soft zoning.
When a device queries the fabric name server, the name server determines the zones
in which the device belongs. The server returns information on all members of the
zones in the fabric to the device. Devices in the zone are identified by node WWN,
port WWN, or domain,port of the switch to which the device is connected.
The primary approaches to fabric-based zoning are summarized in Table 58 .