Table of Contents
Advertisement
NOTE:
Set the same value for R_A_TOV on all directors and switches in a multiswitch fabric. If the
value is not the same on all units, the fabric segments. Also, the value for R_A_TOV must be greater
than the value configured for E_D_TOV.
E_D_TOV
Adjust the E_D_TOV in tenth-of-a-second increments. An error condition occurs when an expected
response is not received within the time limit set by this value. The default value is 20 tenths (2
seconds). Set a value from 2 tenths through 600 tenths (.2 through 60 seconds).
NOTE:
Set the same value for E_D_TOV on all switches and directors in a multiswitch fabric. If the
value is not the same, the fabric segments.
Switch priority
Setting this value determines the principal switch for the multiswitch fabric. Select Principal (highest
priority), Default, or Never Principal (lowest priority) from the Switch Priority drop-down list.
Setting these priority values determines the principal switch selected for the multiswitch fabric. For
example, if you have three switches in the fabric and set one as Principal, one as Default, and one
as Never Principal, the unit set to Principal becomes the principal switch in the fabric.
If all switches are set to Principal or Default, the switch with the highest priority and the lowest
WWN becomes the principal switch. Following are some examples of principal switch selection
when switches have these settings:
•
If you have three switches and set all to Default, the switch with the lowest WWN becomes the
principal 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.
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:
HP recommends that you leave the switch priority setting as Default. If you are considering
setting this value to something other than default, refer to the section on principal switch selection for
multiswitch fabrics in the HP StorageWorks HA-Fabric Manager user guide for details.
In, for example, 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 of 2-253 are not currently in use.
46
Installing and configuring the Edge Switch 2/32
Advertisement
Table of Contents
