Administrator Guide

Prerequisites for Conguring an iSNS Server
The following considerations might apply when conguring an iSNS server:
• By default, the group disables target discovery by iSNS servers. If you want iSNS servers to discover a target, you must enable
this functionality on the target. Set up the iSNS server and congure the iSCSI initiator to use the iSNS server for discovery. See
your iSNS server and iSCSI initiator documentation for details.
• The iSNS server must be accessible to all the group members.
• A group disables automatic discovery of group targets by iSNS servers only if all the group members are running PS Series
rmware version 5.0 or later. If a member is running a previous rmware version, iSNS servers can automatically discover all
group targets.
• You can specify up to three IP addresses. The group uses only one iSNS server at a time. The rst server listed is the default
server. If the default server is not available, the group uses the other servers in the order in which they were specied. Click the
Up and Down arrows to change the IP address order.
• If you are using a port number other than the default of 3205, you need an IP address for each iSNS server in the format
nnn.nnn.nnn.nnn:port.
Enable or Disable iSNS Discovery
You can congure a PS Series group to use an iSNS (Internet Storage Name Service) server, which facilitates the discovery of iSCSI
targets in the group.
By default, the group disables automatic discovery of targets by iSNS servers. If you want an iSNS server to automatically discover a
group target, you must enable this functionality on the target.
Requirement
A group disables automatic discovery of group targets by iSNS servers only if all the group members are running PS Series
rmware version 5.0 or later. If a member is running a previous rmware version (for example, if you downgrade a member from
v5.0), iSNS servers can automatically discover all group targets.
You cannot use the Group Manager GUI to enable or disable iSNS discovery for a volume or snapshot. Instead, you must use the
following CLI command lines:
volume select volume_name isns-discovery enable | disable
volume select volume_name snapshot select snapshot_name isns-discovery enable | disable
Congure an iSNS Server in the Group
To congure an iSNS server:
1. Click Group → Group Conguration.
2. Click the iSCSI tab.
3. In the iSCSI Discovery panel, click Add to open the iSNS Server dialog box.
4. Specify the IP address and optional port for an iSNS server and click OK. (The default port setting is 3205.)
5. Repeat steps 3 and 4 to add up to two additional servers.
NOTE: To prevent hosts from discovering iSCSI targets that do not have the correct CHAP credentials, select the
Prevent unauthorized hosts from discovering targets checkbox.
Modify an iSNS Server
To modify the IP address for an iSNS server:
1. Click Group → Group Conguration.
2. Click the iSCSI tab.
3. In the iSCSI Discovery panel, select the address and click Modify.
4. Change the IP address as needed.
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About Volume-Level Security