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2–Planning
Performance Tuning
2-4 ISR651101-00 G
Performance Tuning
Proper configuration maximizes the router’s performance. Knowing the round-trip
delay (distance between the router and iSCSI initiators) and WAN effective data
rate (connection type) allows you to tune the router for optimal performance. The
following tables provide TCP Window Size settings for specific WAN
environments. The TCP Window Size is configured as two parameters: Window
Size and Scaling Factor. See the iSR6200 Router Manager User’s Guide and the
iSR6200 CLI User’s Guide for configuring the TCP window size.
Table 2-1. T1—1.554Mbps
Round-Trip Delay (ms) TCP Window Size (kBytes)
≤ 41.5 8
≤ 82.9 16
≤ 165.8 32
≤ 331.6 64
≤ 663.2 128
≤ 1326.5 256
≤ 2652.9 512