HP StorageWorks 2000 Series Reference Manual page 44

You can configure the following settings for the iSCSI ports on each MSA2012i
controller module.
Settings that are common to all iSCSI ports are:
Authentication – Enables or disables use of Challenge-Handshake Authentication
Protocol (CHAP). Disabled by default. To set CHAP names and shared secrets,
see "Configuring iSCSI Login Authentication" on page 45.
Link Speed – Sets the link speed either to Automatic, which allows the system to
negotiate the proper speed, or to 1 Gbit/sec. The default is Automatic.
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.
Use of jumbo frames can succeed only if jumbo-frame support is enabled on
all network components in the data path.
iSNS – Enables or disables registration with a specified Internet Storage Name
Service (iSNS) server, which provides name-to-IP-address mapping. Disabled by
default.