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[Didier Barvaux <question237072@xxxxxxxxxxxxxxxxxxxxx>]

Question #237072 on rohc changed:
https://answers.launchpad.net/rohc/+question/237072

    Status: Open => Answered

Didier Barvaux proposed the following answer:
Hello,

As stated on [1], the IP/ROHC tunnel implements packing. So, it waits a
little bit for additional ROHC packets before sending them altogether.
If no additional packets come, the packet is sent alone after some time.

This behavior works great for traffic with many small packets such as
VoIP. It does not work well for scarse traffic such as a single ping.
Try sending ICMP packets quicker with a command such as: ping -i 0.2
<ipaddress> . It should give you better RTT.

You may also change the "packing" parameter in the configuration file of
the IP/ROHC server to increase/decrease the number of packets that are
packed together.

Regards,
Didier

[1] http://rohc-lib.org/wiki/doku.php?id=iprohc-overview

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