Latency tuning Step 5: Optimize the application layer
Digi Connect Family and ConnectPort TS Family
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n Changing the options from their defaults may violate RFCs.
n Decrementing the values for these options increases the amount of network activity. For
example, there will be increased retransmissions.
n For a peer-to-peer application, you need to consider both sides of the connection and how
options are set. For example, if the setting for the rto_min option for the Digi device is set to a
value that is less than the setting for the delayed_ack option for the other side of the
connection, then there will be a forced retransmission of every packet of data. For a master-
slave application, this consideration does not apply.
Step 5: Optimize the application layer
Optimizing the application layer may include, but is not limited to, these recommendations:
n Avoid having more than one application/network node generating time-sensitive traffic in the
network Have one traffic generator in a master-slave setup on the network.
n Avoid running other (management) applications, such as email, image or mp3 downloading
while time-sensitive traffic is running.
n Verify the application itself has timers that cause retransmissions of data.
n Use firewalls.
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