As noted earlier, FrameSets are logical packets. More...

As noted earlier, FrameSets are logical packets.

Here is my current thinking about the layout of frameset data - which is a variant of Type, Length, Value (TLV) entries like those used by LLDP and CDP. Below you will see a number of 2-byte integers, which are all in network-byte order.

+--------------+
| framesettype | 16 bits
+--------------+
|  fs_length   | 16 bits
+--------------+
|   fsflags    | 16 bits
+--------------+
|  frames...   | "fs_length" bytes
+--------------+

All framesets look like this - but the content of the fs_length bytes worth of frames at the end change. Any given framesettype has a set of expected frames that might be included - some mandatory, some optional. All others would be considered unexpected - and will be ignored.