Update NetworkManager Overlay

Signed-off-by: Stephen Simpson <ssimpson89@users.noreply.github.com>

CHANGELOG.md

@@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - `wwctl overlay edit` again writes temporary files to the default location.
   (After #1886 better resolves the underlying issue from #1473.) #1946
 - Prevent brp-mangle-shebangs from changing files in overlays.
+- The NetworkManager overlay now only adds an `[ethernet]` section for ethernet interfaces.
 
 ### Fixed
 
@@ -31,6 +32,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fixed `wwclient --debug` to properly enable debug logging.
 - Updated golang BuildRequires in RPM specfile. #1990
 
+### Changed
+
+### Fixed
+
 ## v4.6.3, 2025-08-01
 
 ### Added

overlays/NetworkManager/internal/networkmanager_test.go

@@ -259,7 +259,6 @@ id=tagged
 interface-name=eth0.902
 type=vlan
 autoconnect=true
-[ethernet]
 [ipv4]
 method=manual
 route1=192.168.1.0/24,192.168.2.254
@@ -331,7 +330,6 @@ miimon=100
 mode=balance-rr
 xmit_hash_policy=layer2+3
 updelay=0
-[ethernet]
 [ipv4]
 method=manual
 address=192.168.3.110/24

overlays/NetworkManager/rootfs/etc/NetworkManager/system-connections/ww4-managed.ww

@@ -29,7 +29,7 @@ transport-mode=datagram
 {{- if $netdev.MTU }}
 mtu={{ $netdev.MTU }}
 {{- end }}
-{{- else }}
+{{- else if eq (default "ethernet" (lower $netdev.Type)) "ethernet" }}
 [ethernet]
 {{- if $netdev.Hwaddr }}
 mac-address={{ $netdev.Hwaddr }}