This series advertises distributed dnat_and_snat NAT entries (floating
IPs) over BGP-EVPN as Type-2 MAC+IP routes, gated by a new 'nat' token of
the provider Logical_Switch 'dynamic-routing-redistribute' option.
Verified in a lab deployment: a distributed floating IP is published in
the SB Advertised_MAC_Binding table, programmed into the EVPN advertise
interface by ovn-controller, advertised as a Type-2 route by FRR, and
reachable from an EVPN peer.
v4 -> v5 (all from Ales' review, thanks!):
- Add a 'type' column ("ip"/"nat") to Advertised_MAC_Binding so that
ovn-controller advertises each row based on the matching redistribute
token. The controller now walks the table in a single pass (instead
of once in the FDB collector and once in the IP collector), and a
floating IP comes out as a Type-2 route with the 'nat' token alone,
without also enabling 'ip'/'fdb'.
- en-advertised-mac-binding-sync no longer triggers a plain recompute on
en_northd/en_lr_nat. It uses a northd change handler gated on the
tracked switches and tracked NAT routers, and reads lr_nat purely as
input data (engine_noop_handler).
- Drop the engine input comments on the plain handlers (a comment is
kept only on the engine_noop_handler input).
- Extend the NAT 'dynamic-routing-advertise' documentation to mention it
also controls the Type-2 advertisement.
On the v4 review note about splitting out a "fix for existing behavior":
I looked into it and could not find one. With the previous
engine_noop_handler on en_northd, toggling the LS 'ip' token (or
dynamic-routing-vni) and the per-port 'dynamic-routing-advertise' option
already take effect, because those changes also update the SB
Port_Binding rows that this node already depends on. Only a NAT change
does not touch a Port_Binding here, which is why the node now needs the
tracked-NAT signal. So there is no separate pre-existing fix to split
out; the new handler exists purely to gate the NAT recompute.
v4: https://mail.openvswitch.org/pipermail/ovs-dev/2026-June/433238.html
Chanyeol Yoon (2):
northd: Advertise distributed NAT IPs over EVPN.
controller: Advertise EVPN MAC bindings by type.
.../topics/dynamic-routing/architecture.rst | 12 ++
NEWS | 6 +
controller/neighbor.c | 81 +++++++---
lib/ovn-util.c | 3 +
lib/ovn-util.h | 3 +-
northd/en-advertised-route-sync.c | 142 ++++++++++++++++--
northd/en-advertised-route-sync.h | 3 +
northd/inc-proc-northd.c | 7 +-
ovn-nb.xml | 27 ++++
ovn-sb.ovsschema | 6 +-
ovn-sb.xml | 19 +++
tests/ovn-inc-proc-graph-dump.at | 3 +-
tests/ovn-northd.at | 98 ++++++++++++
13 files changed, 372 insertions(+), 38 deletions(-)
base-commit: 655f7bfd84aec6afad7447693022a1180789b930
--
2.54.0 (Apple Git-156)
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