There is no such thing as a fully RFC compliant BGP :

https://www.juniper.net/documentation/en_US/junos/topics/reference/standards/bgp.html does not list 7606

Cisco Bug: CSCvf06327 - Error Handling for RFC 7606 not implemented for NXOS

This is as of today and a 2 second google search.. anyone running code from before RFC 7606 (2015) would also not be compliant.

I did not see Juniper on the list of BGP speakers tested.

Töma Gavrichenkov wrote on 1/8/19 9:31 AM:

8 Jan. 2019 г., 20:19 <niels=nanog@bakker.net>:
> In the real world, doing the correct thing

— such as writing RFC compliant code —

> is often harder than doing

> an incorrect thing, yes.

Evidently, yes.