User manual

3
Configure Switch Binding
3-9
Configuring the Switch
• If you have three switches and set two to Principal and one to
Default, the switch with the Principal setting that has the lowest
WWN becomes the principal switch.
• If you have three switches and set two to Default and one to Never
Principal, the switch with the Default setting and the lowest WWN
becomes the principal switch.
Note that at least one switch in a multiswitch fabric needs to be set as
Principal or Default. If all of the switches are set to Never Principal, all
of the interswitch links (ISLs) will segment. If all but one switch is set
to Never Principal and the switch that was Principal goes offline, then
all of the other ISLs will segment.
NOTE: We recommend configuring switch priority as Default. If you are
considering changing this value to something other than the default, refer to
sections on principal switch selection for multiswitch fabrics in the
McDATA
Products in a SAN Environment - Planning Manual (620-000124)
for
details.
In the audit log you may notice that the Principal setting maps to a
number code of 1, Default maps to a number code of 254, and Never
Principal maps to a number code of 255. The number codes 2-253 are
no longer in use.
Interop Mode Select either McDATA Fabric 1.0 or Open Fabric 1.0 mode. Use Open
Fabric 1.0 if the fabric contains McDATA directors and switches and
other open-fabric compliant switches. Use this mode to manage
heterogeneous fabrics. McDATA recommends using this mode. Use
McDATA Fabric 1.0 if the fabric contains McDATA directors and
switches that are also operating in McDATA Fabric 1.0 mode.
Configure Switch Binding
For complete procedures on configuring this optional feature, refer to
SANtegrity Features on page 6-3.