HP Brocade 4Gb SAN Switch for HP BladeSystem p-Class - Manual (Page 128)

128 Administering advanced zoning
• Checks each frame before it is delivered to a zone member and discards it if there is a zone
mismatch. When hardware-enforced zoning is active, the HP StorageWorks switch monitors the
communications and blocks any frames that do not comply with the effective zone configuration. The
switch performs this blocking at the transmit side of the port on which the destination device is
located.
• Is enforced at the ASIC level. Each ASIC maintains a list of source port IDs that have permission to
access any of the ports on that ASIC.
Fabric OS uses hardware-enforced zoning (on a per-zone basis) whenever the fabric membership or
zone configuration changes.
Table 20 shows the various HP StorageWorks switches, the hardware zoning methodology for each, and
tips for best usage.
Table 20 Enforcing hardware zoning
Fabric type Methodology Best practice
1-GB switches Enables hardware-enforced zoning only on domain,
port zones; WWN or mixed zones are not
hardware-enforced. Any domain, port zone that
overlaps a mixed or WWN zone is not
hardware-enforced.
An overlap occurs when a member specified by
WWN is connected to a port in a domain, port zone.
The domain, port zone loses its hardware enforcement
even though a review of the zone configuration does
not indicate it.
Use
domain, port
identifiers. Do not
identify a zone member by its WWN.
2-GB switches,
Core Switch
2/64, and
SAN Director
2/128
Enables hardware-enforced zoning on domain, port
zones and WWN zones. Overlap of similar zone
types does not result in the loss of hardware
enforcement. Overlap with other zone type results in
the loss of hardware enforcement.
As in the 1-GB switches, connecting a device specified
by WWN into a port specified in a domain, port zone
results in loss of the hardware enforcement in both
zones.
Use either WWN or
domain, port
identifiers.
Mixed
switches
Enables hardware-enforced zoning according to each
switch type. Use the
portzoneshow
command to find
the switch type to which a device is attached.
Use d
omain, port
identifiers.
You can use WWN identifiers if you
place disk and tape targets on Core
Switch 2/64 and SAN Director 2/128,
and do not use
domain, port
identifiers.