Iscsi Interface Advanced Features; Iscsi Listener Port; Tcp Tuning Parameters - HP Cisco MDS 9216 - Fabric Switch Configuration Manual

Configuring iSCSI
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
If an iSCSI initiator supports immediate data and unsolicited data features, these features are
automatically enabled on the MDS switch with no configuration required.

iSCSI Interface Advanced Features

Advanced configuration options are available for iSCSI interfaces on a per-IPS port basis. These
configurations are similar to the advanced FCIP configurations and are already explained in that section .
Cisco MDS switches support the following advanced features for iSCSI interfaces:
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iSCSI Listener Port

You can configure the TCP port number for the iSCSI interface that listens for new TCP connections.
The default port number is 3260. Once you change the TCP port number, the iSCSI port only accepts
TCP connections on the newly configured port.

TCP Tuning Parameters

You can configure the following TCP parameters:
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QoS
To set the QoS values using Fabric Manager, follow these steps:
Cisco MDS 9000 Family CLI Configuration Guide
50-32
iSCSI Listener Port, page 50-32
TCP Tuning Parameters, page 50-32
QoS, page 50-32
iSCSI Routing Modes, page 50-33
Minimum retransmit timeout (See the
Keepalive timeout (See the
Maximum retransmissions (See the
Path MTU (See the "Path MTUs" section on page
SACK (SACK is enabled by default for iSCSI TCP configurations.) (See the
Acknowledgments" section on page
Window management (The iSCSI defaults are max-bandwidth is 1 Gbps, min-available-bandwidth
is 70 Mbps, and round-trip-time is 1 msec.) (See the
page 48-20.)
Buffer size (The iSCSI default send buffer size is 4096 KB) (See the
page 48-21.)
Window congestion monitoring (enabled by default and the default burst size is 50 KB) (See the
"Monitoring Congestion" section on page
Maximum delay jitter (enabled by default and the default time is 500 microseconds) (See the
"Estimating Maximum Jitter" section on page
"Minimum Retransmit Timeout" section on page
"Keepalive Timeout" section on page
"Maximum Retransmissions" section on page
48-20.)
48-20.)
"Window Management" section on
48-20.)
48-21.)
Chapter 50 Configuring iSCSI
48-19.)
48-19)
"Selective
"Buffer Size" section on
OL-16184-01, Cisco MDS SAN-OS Release 3.x
48-19.)