diff --git a/docs/ROADMAP.md b/docs/ROADMAP.md
index 37c832e..351efd4 100644
--- a/docs/ROADMAP.md
+++ b/docs/ROADMAP.md
@@ -297,6 +297,23 @@ and the global feed carries none — so E4 is **built to the L3VPN schema and
 unverifiable in this lab**; it validates only against production routers.
 Keep E4 scope minimal until there's a real L3VPN source.
 
+### E5. L2VPN / EVPN support — platform-level, not a dashboard task
+
+L2VPN/EVPN was requested alongside L3VPN. **It cannot be done as a dashboard
+change**: this OpenBMP deployment (collector 2.2.3, psql-app 2.2.2) has *no
+EVPN/L2VPN schema* — the only RIB tables are `ip_rib` (unicast), `l3vpn_rib`
+(VPNv4/6) and `ls_*` (BGP-LS). EVPN routes (Type-2 MAC/IP, Type-3 IMET,
+Type-5 IP-prefix) have nowhere to land and are dropped by the consumer.
+
+Supporting it means **upstream platform work**, not Grafana:
+- EVPN parsing in the collector + psql-app (these are upstream `openbmp/*`
+  images — would need a fork or an upstream contribution).
+- A new `evpn_rib` / `l2vpn_rib` table + history + stats.
+- Only then: EVPN dashboards (per-EVI, MAC mobility, RT scoping).
+
+Recommend treating E5 as a research spike first: confirm whether any current
+OpenBMP release adds EVPN, versus the cost of carrying a fork.
+
 ### E-scale. PostgreSQL sizing for a full table
 
 A full v4+v6 table is ~1.2M prefixes; with attributes and history this is a
@@ -328,7 +345,8 @@ more valuable once real-Internet AS paths are present.
 | 14 | E1 | Analytics | GoBGP full-table feed (AS57355 live + MRT fallback) |
 | 15 | E2 | Analytics | Generic 4-router diff dashboard |
 | 16 | E3 | Analytics | Global table exploration dashboard |
-| 17 | E4 | Analytics | VRF/RD scoping (to schema, lab-unverifiable) |
+| 17 | E4 | Analytics | VRF/RD scoping for L3VPN (to schema, lab-unverifiable) |
+| 18 | E5 | Platform | L2VPN/EVPN support — research spike, then collector/schema work |
 
 Steps 1-5 (Track A) unblock everything else. Steps 6-7 and 8-10 can proceed in parallel once the foundation is in place. Track E is independent of A-D: E1 is the foundation for E2/E3; E4 can proceed any time but is lab-unverifiable.