Tuning Recommendations¶

When a connection is made over an expensive link (for example, ISDN), use a large idle value to reduce network traffic:

TCP_KEEPIDLE=14400   ! Corresponds to 7200 seconds (2 hours) between probes

If a connection failure must be detected as quickly as possible, use a small value. For example:

TCP_KEEPIDLE=150   ! Corresponds to 75 seconds before first probe