Wireshark accepts user-defined dissectors that can parse out packets that Wireshark does not understand natively. One such dissector has been created for CobraNet packets. The attached .lua file is the dissector. The attached PDF explains how to install and use it.

[15 Jan 2020, KATench] Updated the dissector to version 2.15 (since network storage is offline). Note, if you have an earlier version installed, you must either remove the old version in the Wireshark plugins or change the extension to something other than .lua.