On Dec 5, 2025, at 12:34 PM, Mahesh Jethanandani <[email protected]> 
wrote:

> What did we decide for grandfathered entries that do not have a reference? 
> Did we not decide to refer to the document itself? E.g., LinkType Value 4, 5, 
> etc.

For LinkType value 4, what does adding a reference to a document that says

        Name            LINKTYPE_PRONET
        Number          4
        Description     Proteon PRONet Token Ring

have over a Descrption field in the registry that says "Proteon PRONet Token 
Ring"? (There's no reference because I haven't found a document giving the 
detailed octet-by-octet format of the link-layer header for PRONet; if somebody 
knows of such a document, I'd be happy to point to that as a reference.)

For LinkType value 5, we *do* have a reference - 
http://www.bitsavers.org/pdf/mit/ai/AIM-628_chaosnet.pdf, which is Dave Moon's 
AI lab memo on Chaosnet.
For LinkType value 6, the reference would either be IEEE Std 802.5, as the 
Description field says "IEEE 802.5 Token Ring", or would be a 
LINKTYPE_IEEE802_5 document on tcpdump.org giving more details, indicating that 
the frame format is from 802.5 and that it doesn't include the Starting 
Delimiter, Ending Delimiter, or Frame Status. For 802.5, we can probably 
specifically refer to IEEE Std 802.5-1998, as I don't anticipate any further 
802.5 work. In any case, I'm not sure how citing referring back to the I-D/RFC 
itself is useful other than filling a hole in the registry.
For LinkType value 7, the problem is that I haven't spent enough time staring 
at the BSD ARCnet code to figure out everything weird about it. For example, it 
appears that for fragmented frames as per RFC 1201/ATA 878.2 Draft ARCNET 
Packet Fragmentation Standard, the fragments and the reassembled packet might 
both be delivered.
So my inclination for those entries is to fill in the Reference column in the 
text with "Reference not available".
Are registry entries mutable, so that, if a reference for a "Reference not 
available" entry later becomes available, it could be added?
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