HP Cisco MDS 9134 Cisco MDS 9000 Family CLI Configuration Guide, Release 3.x ( - Page 1035

Chapter 42 Configuring iSCSI Configuring iSCSI Send documentation comments to [email protected] To access these commands from the iSCSI interface, follow these steps: Step 1 Step 2 Command switch# config t switch(config)# switch(config)# interface iscsi 4/1 switch(config-if)# Purpose Enters configuration mode. Selects the iSCSI interface on the switch. Cisco MDS switches support the following advanced features for iSCSI interfaces: • iSCSI Listener Port, page 42-27 • TCP Tuning Parameters, page 42-27 • QoS, page 42-28 • iSCSI Routing Modes, page 42-28 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. See the "Configuring TCP Listener Ports" section on page 40-12. TCP Tuning Parameters You can configure the following TCP parameters: • Minimum retransmit timeout (See the "Minimum Retransmit Timeout" section on page 40-13.) • Keepalive timeout (See the "Keepalive Timeout" section on page 40-13.) • Maximum retransmissions (See the "Maximum Retransmissions" section on page 40-14) • Path MTU (See the "Path MTUs" section on page 40-14.) • SACK (SACK is enabled by default for iSCSI TCP configurations.) (See the "Selective Acknowledgments" section on page 40-14.) • 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 "Window Management" section on page 40-15.) • Buffer size (The iSCSI default send buffer size is 4096 KB) (See the "Buffer Size" section on page 40-17.) • Window congestion monitoring (enabled by default and the default burst size is 50 KB) (See the "Monitoring Congestion" section on page 40-15.) • Maximum delay jitter (enabled by default and the default time is 500 microseconds) (See the "Estimating Maximum Jitter" section on page 40-16.) OL-16184-01, Cisco MDS SAN-OS Release 3.x Cisco MDS 9000 Family CLI Configuration Guide 42-27