From: Thomas Monjalon <tho...@monjalon.net>
> I'm not familiar with these headers.
> Are they standardized?
> Is there a RFC?

Arista Vendor Specific Protocol is not publicly disclosed yet. However, 
Wireshark already includes a dissector implementetation and its source code can 
serve for now as a reference:
https://gitlab.com/wireshark/wireshark/-/blob/master/epan/dissectors/packet-avsp.c

> I'm not sure about adding vendor specific protocols.
> What should be the policy here?

Given the large number of registered EtherType™ assignments related to IEEE 
802.3™ (ISO/IEC 8802-3) standard, supporting vendor-specific protocols should 
be considered. Though probably not in the way I organized it, mixing 
RFC-standardized and proprietary protocols in the same files. ./lib/net can 
have a new subdirectory for keeping them separate. 

Arista timestamp is particularly valuable for stock exchanges due to 
efficiency. The timestamp extension is already in use at German Eurex Exchange 
and it needs to undergo PoC trials at Borsa İstanbul, which utilizes Nasdaq 
infrastructure. Some parts of it rely on DPDK and this patch will be especially 
useful.

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