HP StorageWorks XPath OS 7.4.X Administrator Guide (AA-RVHDD-TE, February 2006)

XPath OS 7.4.x administrator guide 81

A secondary switch automatically becomes the primary if the current primary is removed from the fabric.

When this occurs, the primary selection is based on the second and third least-significant bytes of the

switch WWN. The secondary switch in the fabric with the larger value of those two bytes becomes the

primary. For example, a secondary with a WWN of 10:00:00:05:1e:15:84:00 becomes primary over

another secondary with a WWN of 10:00:00:05:1e:12:de:00 because 0x1584 is larger than 0x12de.

Enabling and disabling iFCS

The MP Router on which you enable iFCS becomes the primary iFCS router. The iFCS function is disabled

by default.

Use the following commands to enable or disable iFCS:

Issue the ifcsEnable command to enable iFCS.

On the primary iFCS router, issue the ifcsDisable command to disable iFCS.

Displaying iFCS information

Once the primary iFCS router has distributed and synchronized the configuration information across MP

Routers, you can display information about the entire iSCSI configuration from any MP Router in the fabric.

The types of information you can view are described in Table 7.

iFCS behavior during configuration download

The status of iFCS is indicated by the iscsi.ifcsEnableStatus entry in the configuration file.

If iFCS is enabled, the entry reads iscsi.ifcsEnableStatus:YES

If iFCS is disabled, the entry reads iscsi.ifcsEnableStatus:NO

Table 8 summarizes the resulting iFCS status for a fabric when a configuration file is downloaded to that

fabric.

Table 7 iFCS information

To display Use the command Parameter

iFCS information ifcsShow none

IQN-to-WWN mapping table iscsiWwnAlloc none

Zoning information iscsiWwnAlloc –v

CHAP information iscsiAuthCfg none

Table 8 Effect of downloading a configuration file with iFCS enabled or disabled

iFCS status in configuration file iFCS enabled in destination file Result

iscsi.ifcsEnableStatus:YES

(enabled)

YES The switch joins the fabric as a

secondary iFCS switch.

iscsi.ifcsEnableStatus:NO

(disabled)

NO The switch joins the fabric with

iFCS disabled.