MSA 2040 SMU Reference Guide

Configuring system settings 47
To change iSCSI host interface settings
1. In the Configuration View panel, right-click the system and select Configuration > System Settings > Host
Interfaces.
2. In the Common Settings for iSCSI section of the panel, set the options that apply to all iSCSI ports:
• Authentication (CHAP). Enables or disables use of Challenge Handshake Authentication Protocol. Disabled by
default.
NOTE: CHAP records for iSCSI login authentication must be defined if CHAP is enabled. To create CHAP
records, see "Configuring CHAP" (page 78).
• Jumbo Frames. Enables or disables support for jumbo frames. A normal frame can contain 1500 bytes
whereas a jumbo frame can contain a maximum of 9000 bytes for larger data transfers. Disabled by default.
NOTE: Use of jumbo frames can succeed only if jumbo-frame support is enabled on all network components
in the data path.
• iSCSI IP Version. Specifies whether IP values use Internet Protocol version 4 (IPv4) or version 6 (IPv6) format.
IPv4 uses 32-bit addresses. IPv6 uses 128-bit addresses. The default is IPv4.
• iSNS. Enables or disables registration with a specified Internet Storage Name Service server, which provides
name-to-IP-address mapping. Disabled by default.
• iSNS Address. Specifies the IP address of an iSNS server. The default address is all zeroes.
• Alternate iSNS Address. Specifies the IP address of an alternate iSNS server, which can be on a different
subnet. The default address is all zeroes.
3. In the upper section of the panel, set the port-specific options:
• IP Address. For IPv4 or IPv6, the port IP address. For corresponding ports in each controller, assign one port to
one subnet and the other port to a second subnet. Ensure that each iSCSI host port in the storage system is
assigned a different IP address. For example, in a system using IPv4:
• Controller A port 3: 10.10.10.100
• Controller A port 4: 10.11.10.120
• Controller B port 3: 10.10.10.110
• Controller B port 4: 10.11.10.130
• Netmask. For IPv4, subnet mask for assigned port IP address. The default is 255.255.255.0.
• Gateway. For IPv4, gateway IP address for assigned port IP address. The default is 0.0.0.0.
• Default Router. For IPv6, default router for assigned port IP address. If the gateway was set for IPv4 and then
ports were switched to IPv6, the default is ::IPv4-address; otherwise, the default is :: (the short form of
all zeroes).
• Link-Local Address. For IPv6, the link-local address that is automatically generated from the MAC address and
assigned to the port.
CAUTION: Changing IP settings can cause data hosts to lose access to the storage system.
4. Click Apply.