HP StorageWorks XP Remote Web Console Software - Manual (Page 21)

LUN Configuration and Security Manager XP user guide for the XP1024/XP128 21
that would otherwise be reserved for the other ports. Balancing the workload on the processors can
improve system performance.
If high-speed (2 port) mode is applied to a four-port channel adapter board, two ports out of the four ports
cannot be used. The remaining two ports can exclusively use channel processors and FOPs that would
otherwise be reserved for the other two ports.
Figure 6 Differences between high-speed and high-speed (2 port) modes
Before changing the configuration of a port that is being used, perform a backup operation. You cannot
switch between standard and high-speed while you are online to the hosts.
iSCSI environments
iSCSI (Internet Small Computer System Interface) is a protocol that enables data transfers between host
computers and large-scale storage devices over an IP (Internet Protocol) network. If you want to use the
disk array as an IP storage device, host servers should be attached to disk array’s iSCSI ports.
iSCSI environments that can be created with LUN Manager support local connections (that is, hosts in the
same domain can communicate with each other), but do not support inter-domain connections or external
LAN connections.
Configuring an iSCSI environment
When configuring an iSCSI environment:
• Confirm what operating systems are used to run hosts in your IP network. To configure an iSCSI
network, each of the hosts must run under the Windows Server 2003, Windows 2000 ® , or HP-UX 11i
operating system. However, user authentication is not available on hosts running under HP-UX 11i.
• You can set ports to perform user authentication. The ports use CHAP (Challenge Handshake
Authentication Protocol) as the authentication method.
• Switching hubs can be connected to iSCSI ports, but other network relay devices cannot be connected
to iSCSI ports.
iSCSI port settings and iSNS server settings
You must configure iSCSI ports and iSNS servers, if necessary, when configuring an iSCSI environment.
Specify the following items when configuring an iSCSI environment. (See ” Configuring iSCSI Ports ” on
page 42).
• IP: (Mandatory). The IP addresses of iSCSI ports. In LUN Manager, the default value of an iSCSI port
IP address is 192.168.0.xxx, where xxx is the location of the iSCSI port.
• Subnet mask: (Mandatory). The subnet mask is the value that is used to obtain a network address from
an IP address. In LUN Manager, the default subnet mask is 255.255.255.0.