> I would like to know what protocol does the ethertype
> 0x886D stand for. I have searched for it in RFC1700
> under assigned numbers for ether types but could not
> find it there.
RFC 1700 is several years old; no updated versions have been produced.
The page at
http://www.iana.org/numbers.html
says:
IANA houses the many unique parameters and protocol values
necessary for operation of the Internet and its future
development. Types of numbers range from unique port
assignments to the registration of character sets. In the past,
these numbers were documented through the RFC document series,
the last of these documents was RFC 1700, which is also now
outdated. Since that time, the assignments have been listed in
this directory as living documents, constantly updated and
revised when new information is available and new assignments
are made. They are listed alphabetically. Please check back
periodically if you need up to date information from these
files. Thank you.
so you should look at that page, and pages to which it links, rather
than RFC 1700.
If you look under "E" on that page:
http://www.iana.org/numbers.html#E
it says:
Ethernet Numbers
Many of the networks of all classes are Ethernets (10Mb) or
Experimental Ethernets (3Mb). These systems use a message
"type" field in much the same way the ARPANET uses the "link"
field. The following list of EtherTypes is contributed
unverified information from various sources.
The "Ethernet Numbers" link goes to
http://www.iana.org/assignments/ethernet-numbers
but...
> I have a captured frame containing the ethertype as
> 0x886D that I want to decode.
...it has no entry for 886D.
A Google search for
+886d +Ethernet
found
http://www.ethereal.com/lists/ethereal-users/200102/msg00052.html
which is a message from a thread on, well, "ethereal-users", about the
Ethernet type 0x886d.
The conclusion in that thread appears to be that they're heartbeat
packets for some Intel-proprietary network adapter fault tolerance
protocol. Good luck in finding a specification for that protocol....