From 3609fb676bf0cda3d432f64a37d071f54309570d Mon Sep 17 00:00:00 2001
From: rcourtman <courtmanr@gmail.com>
Date: Fri, 27 Mar 2026 15:25:52 +0000
Subject: [PATCH] Preserve named guest interfaces without MACs (#1319)

---
 internal/monitoring/guest_metadata.go      |  6 +++---
 internal/monitoring/guest_metadata_test.go | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/internal/monitoring/guest_metadata.go b/internal/monitoring/guest_metadata.go
index 65bfb909be..ec93ca19a8 100644
--- a/internal/monitoring/guest_metadata.go
+++ b/internal/monitoring/guest_metadata.go
@@ -611,9 +611,9 @@ func processGuestNetworkInterfaces(raw []proxmox.VMNetworkInterface) ([]string,
 			if ifaceName == "" || lowerName == "lo" || lowerName == "loopback" {
 				continue
 			}
-			if mac == "" || mac == "00:00:00:00:00:00" {
-				continue
-			}
+			// Preserve named non-loopback interfaces even when early/partial guest-agent
+			// payloads have not populated MAC or IP details yet. The interface identity
+			// is still useful for the VM Summary view and should not wait for a later poll.
 		}
 
 		guestIfaces = append(guestIfaces, models.GuestNetworkInterface{
diff --git a/internal/monitoring/guest_metadata_test.go b/internal/monitoring/guest_metadata_test.go
index d4132bdd09..049ed69cc3 100644
--- a/internal/monitoring/guest_metadata_test.go
+++ b/internal/monitoring/guest_metadata_test.go
@@ -557,6 +557,21 @@ func TestProcessGuestNetworkInterfaces(t *testing.T) {
 				{Name: "eth0", MAC: "00:11:22:33:44:55", Addresses: nil},
 			},
 		},
+		{
+			name: "interface with name only still keeps non-loopback identity",
+			raw: []proxmox.VMNetworkInterface{
+				{
+					Name:         "Ethernet 2",
+					HardwareAddr: "",
+					IPAddresses:  nil,
+					Statistics:   nil,
+				},
+			},
+			wantIPs: []string{},
+			wantIfaces: []models.GuestNetworkInterface{
+				{Name: "Ethernet 2", MAC: "", Addresses: nil},
+			},
+		},
 		{
 			name: "loopback-only interface with no IPs and no traffic is excluded",
 			raw: []proxmox.VMNetworkInterface{