Send documentation comments to mdsfeedback-doc@cisco.com
20-54
Cisco MDS 9000 Family Troubleshooting Guide, Release 3.x
OL-9285-05
Chapter 20 Troubleshooting IP Storage Services
iSCSI TCP Performance Issues
Figure 20-14 Congestion Window: Current: 24 kB
TCP Parameter Changes
To change TCP parameters in the Windows registry, use the registry parameters shown in Figure 20-14
as an example.
Setting the Tcp1323Opts (circled in green) to 3, sets two bits on, one for window scaling and the other
for the time-stamp option. We are only interested in the window scaling here.
Caution Editing the registry is a very high risk operation, it can render the system unusable, requiring a
reinstallation of the entire operating system. Only advanced users should perform this operation.
Displaying the Gigabit Ethernet Interface
Choose Switches > Interfaces > Gigabit Ethernet using Fabric Manager to view the Gigabit Ethernet
status.
Or use the show interface CLI command to view the Gigabit Ethernet status (see Example 20-2).
Example 20-2 Annotated Output of show interface gigabitethernet CLI Command
MDS_BOTTOM# show interface gigabitethernet 2/1
GigabitEthernet2/1 is up
Hardware is GigabitEthernet, address is 0005.3000.a85a
Internet address is 10.48.69.251/26
MTU 1500 bytes, BW 1000000 Kbit
Port mode is IPS
Speed is 1 Gbps
Beacon is turned off
5 minutes input rate 3957384 bits/sec, 494673 bytes/sec, 6716 frames/sec
To Next Page
Loading...
Need help?
General