
DLSw Configuration Overview
114063 Rev. A 3-9
Dual-Switch Configuration Requirements
This section describes the objects you define when you configure dual-switch
DLSw services on the router, specifically
• DLSw global parameters
• DLSw Slot Table entries
• DLSw Peer IP Table entries
DLSw Global Parameters
In dual-switch DLSw configurations, DLSw requires the same DLSw global
parameters as those required by single-switch DLSw. However, you may want to
edit those parameters that directly tune network performance, such as TCP
Window Size, Keepalive Time, and Reject Unconfigured Peers.
TCP Window Size
The TCP Window Size parameter informs DLSw about how much data can be
outstanding on a TCP connection. The size of the window affects performance,
latency, flow control, and memory usage. A larger window causes less flow
control to occur with a possible increase in latency. Editing the TCP Window Size
parameter affects new TCP session establishment only. Existing sessions are
unaffected.
Generally, networks with slower line speeds require smaller window sizes, while
networks with faster line speeds benefit from larger windows. The default value is
acceptable for most networks. A TCP Window Size setting of 5000 octets may be
appropriate for small networks. For high-speed networks, you should increase this
value.
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