Stats Reports follows per-peer header, which has L flag indicating
indicates that the message reflects post-policy

RFC7854 created stats type 7/8/9/10 for route counts, without
specifying whether they are pre or post policy

Later RFC8671 added stats report 14/15/16/17 with dedicated stat types
for pre / post policy in Adj-RIB-Out, making the route counter setup
inconsistent with Adj-RIB-In
https://www.iana.org/assignments/bmp-parameters/bmp-parameters.xhtml#statistics-types

Should L flag be meaningful for stats reports? If this is the case
data in type 7/8/9/10 would be expected to match L flag?
If not, why didn't stat type 7/8/9/10 get updated to match the setup
in RFC8671 for Adj-RIB-Out?

In JunOS 18's implementation, it appears stats reports are always sent
with L flag set to 0, even though only post-policy monitoring has been
configured.

a related discussion that predates RFC 8671
https://mailarchive.ietf.org/arch/msg/grow/Coqz738DPv7ZGVy-9GGzUBjtsF8/

Thanks.



Yang

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