tcp_cwnd_max

Description

The maximum value of TCP congestion window (cwnd) in bytes.

For more information on TCP congestion window, refer to RFC 1122 and RFC 2581.

Default

1,048,576

Range

128 to 1,073,741,824

Dynamic?

Yes

When to Change

This is the maximum value a TCP cwnd can grow to. Note that even if an application uses setsockopt(3XNET) to change the window size to a value higher than tcp_cwnd_max, the actual window used can never grow beyond tcp_cwnd_max. Thus, tcp_max_buf should be greater than tcp_cwnd_max in general.

Commitment Level

Unstable