SAN Boot Implementation and Best Practices Guide ... - IBM Redbooks

SG247958-Introduction to SAN Boot-CL.fm Draft Document for Review June 27, 2012 9:05 am
WA1
Zone Name Aliases
Zone_1 WA1, WA2
Zone_2 NY1, NY2
Zone_3 CO1, CO2
Figure 1-2 Basic zoning configuration
Important reminders:
Zone_1
WA 2 NY 1
Alias WWPN
WA1 50:05:76:ab:cd:22:03:65
WA2 50:05:76:ab:cd:22:03:66
NY1 50:05:76:ab:cd:22:03:67
NY2 50:05:76:ab:cd:22:03:68
CO1 50:05:76:ab:cd:22:03:69
CO2 50:05:76:ab:cd:22:03:70
Zone_2
Zon e_3
Correct zoning helps avoid many problems and makes it easier to trace cause of errors.
Here are some examples of why correct zoning is important:
► Ensure that all zoning information is fully documented and that documentation is kept
up to date. This information must be kept in a safe location and can be used for
reference and planning purposes. If done correctly, the document can be used to assist
in diagnosing zoning problems as well.
► When configuring World Wide Name (WWN) based zoning, it is important to always use
the World Wide Port Name (WWPN), not the World Wide Node Name (WWNN). With
many systems, the WWNN is based on the Port WWN of the first adapter detected by
the HBA driver. If the adapter that the WWNN is based on happens to fail, and you
based your zoning on the WWNN, then your zoning configuration becomes invalid.
Subsequently, the host with the failing adapter then completely loses access to the
storage attached to this switch.
► Keep in mind that you will need to update the zoning information if you ever need to
replace a Fibre Channel adapter in one of your servers. Most storage systems such as
the DS4000, Enterprise Storage Subsystem, and IBM Tape Libraries have a WWN tied
to the Vital Product Data of the system unit, so individual parts can usually be replaced
with no effect on zoning.
For more details on configuring zoning with your particular switch, see:
► Implementing an IBM/Brocade SAN with 8 Gbps Directors and Switches, SG24-6116
► IBM SAN Survival Guide, SG24-6143
8 SAN Boot Implementation and Best Practices Guide for IBM System Storage
NY 2
CO1
CO 2