Quantum SNC 4500, User Manual

Page: 92 / 122

86 Management Port Command Reference
set DPMTU [port number] [MTU choices]
The set DPMTU command controls the MTU (Maximum Transmission Unit) used by the SNC data ports.
Increasing the MTU on the SNC can improve throughput on the SNC data ports. The host MTU must be
changed to match the SNC value in accordance with manufacturer’s instructions. This command must be
followed by
saveConfiguration restart .
The MTU for the management port cannot be changed. The default setting is ”1514.” A saveConfiguration
restart command must be used to permanently save this configuration. Refer to iSCSI Performance Tuning
on page 107 and get DPMTU [port number] on page 65.
The following example sets the Ethernet data port 0 to MTU 1514.
Ready.
set DPMTU dp0 1514
Ready.*
set EthernetSpeed [port number] [speed]
The set EthernetSpeed command controls the speed of the SNC Ethernet ports.
Refer to iSCSI Performance Tuning on page 107. If auto is enabled, the speed is negotiated. When hard
set, 10 and 100 speeds are half duplex. The default setting is “auto." A saveConfiguration restart
command must be used to permanently save this configuration. Refer to get EthernetSpeed [port number]
on page 66.
CAUTION
Increasing the MTU can improve performance. To fully understand the
implications and network requirements, contact your service
representative before modifying this value.
Port Number Meaning
dp0 or dp1 Ethernet connection labeled Ethernet port 0 or Ethernet port 1
all All Ethernet data ports
MTU Choices
1514 9014 16128
CAUTION
Contact ATAC before using this command.
Port Number Meaning
mp0 Ethernet management port labeled Ethernet port 2
dp0 or dp1 Ethernet data port labeled Ethernet port 0 or Ethernet port 1
all All Ethernet port connections