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6806800H62B ATCA‐S201InstallationandUseGuide88
7.1.6 iSCSI Discovery filter configuration (expert mode)
The iSCSI service running on the storage blade includes the ability to limit the
targets each host will see during discovery; this can often significantly reduce the
iSCSI boot time. The filter mechanism uses the host IP address as criteria to expose
or hide iSCSI targets listed in discovery.
Note: This mechanism is not meant to replace the CHAP security features used to
authenticate a host and target.
The iSCSI discovery filter is configured via simple edits to a pair of text based
configuration files:
/etc/initiators.allow
/etc/initiators.deny
The file syntax is explained in the next section. File changes become active
immediately upon save, no reboot is necessary.
Notes: Comment lines must start with a ‘#’ as first character.
- The file consists of one or more iSCSI iqn Target names.
- If a target iSCSI iqn is not listed in these files, no filtering is applied (this is default
case)
- To establish a discovery filter, a target’s iSCSI iqn name must appear in both files.
/etc/initiators.allow
Enter the iSCSI iqn followed by one or more ip addresses. Use a comma to separate
multiple IP address entries. (Note: Entries must not use tabs)
iqn.1995-07.com.emerson:BladeHost.Target0 192.168.1.109
iqn.1995-07.com.emerson:BladeHost.Target1 192.168.1.108, 192.168.1.110
/etc/initiators.deny
For each iSCSI iqn listed above, make a corresponding entry as shown. Each entry
should consist of the iSCSI iqn, followed by the word ALL (Note: Entries must not use
tabs).
iqn.1995-07.com.emerson:BladeHost.Target0 ALL
iqn.1995-07.com.emerson:BladeHost.Target1 ALL