[pve-devel] [PATCH pve-docs 1/1] sdn: vxlan: add short section about underlay address family

[Hannes Laimer]

Signed-off-by: Hannes Laimer <h.laimer at proxmox.com>
---
 vxlan-and-evpn.adoc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/vxlan-and-evpn.adoc b/vxlan-and-evpn.adoc
index 12bcea9..4349ba9 100644
--- a/vxlan-and-evpn.adoc
+++ b/vxlan-and-evpn.adoc
@@ -19,6 +19,14 @@ Each overlay network is known as a VXLAN Segment and identified by a unique
 VXLAN encapsulation add 50bytes overhead, so you need to increase mtu on your host
 physical interfaces to 1550 at minimum. (or decrease mtu inside your vms to 1450)
 
+Underlay address family
+^^^^^^^^^^^^^^^^^^^^^^^
+
+VXLAN underlays are configured either IPv4-only or IPv6-only. Dual-stack
+underlays are not supported; the peer list must be a single address family.
+When using a fabric that provides both IPv4 and IPv6 node addresses, IPv6 is
+preferred.
+
 For BUM traffic (broadcast / unknown unicast traffic, multicast),
 we have 3 different VXLAN setup modes : multicast, unicast, bgp-evpn
 
-- 
2.47.3