Hi Saumya,

Greatly appreciate your positive feedback on the Remote VRF Information TLV 
approach.

Please feel free to integrate your team's ideas and proposals into the -02 
version. Let's collaborate to shape a comprehensive new version together.

Best regards,
Shunwan (on behalf of the co-authors of 
draft-zhuang-grow-bmp-enhancement-for-vrf-loc-rib)


From: Dikshit, Saumya <[email protected]>
Sent: Sunday, July 26, 2026 6:50 PM
To: [email protected]
Cc: [email protected]; Changwang Lin 
<[email protected]>; Srivastava, Mukul <[email protected]>
Subject: [GROW] Comments on 
draft-zhuang-grow-bmp-enhancement-for-vrf-loc-rib-01 : applicability to 
EVPN/IRB and inter-VRF leaking


Hi Shunwan, Nan, Haibo,

The Remote VRF Information TLV nicely closes the "which remote VPN instance did 
this best-path come from" gap in RFC 9069 Loc-RIB reporting. I believe there's 
a directly analogous problem on the EVPN side that this draft's mechanism could 
cover with minor generalization:

  *   draft-saum-grow-bmp-afi-safi-evpn defines per-EVI EVPN RIB stats keyed by 
RD (Section 2.2), and separately calls out "dynamic inter-VRF route leaking 
(IVRL)" for EVPN Type-5/IRB routes as an area needing counters.

  *   Today your draft scopes the Remote VRF Information TLV to VPNv4/VPNv6 
Loc-RIB only (Figure 1 example).

     *   Would you be open to extending the applicability statement to the EVPN 
AFI/SAFI (25/70).

     *   Thus, single Remote VRF Information TLV mechanism covers both L3VPN 
and EVPN-IRB inter-VRF leak visibility?

  *   If that's in scope for a -02, we'd like to contribute the EVPN-side text 
and an example (analogous to your Figure 1) showing an EVPN Type-5 (prefix) 
route leaked across VRFs with the Remote VRF Information TLV attached.

(Hi Nan, a separate topic from your rel-enhancement/filtering thread which I 
was trying keep pace with.  Just flagging in case both land in your inbox close 
together.)

Let us know if a joint revision makes sense, happy to send a draft diff. 
@Srivastava, Mukul<mailto:[email protected]> and @Changwang 
Lin<mailto:[email protected]> are also co-author to 
draft-saum-grow-bmp-afi-safi-evpn

Thanks ,
Saumya
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