diff --git a/netinfra/dhcp/dhcpd-primary.conf b/netinfra/dhcp/dhcpd-primary.conf
index 5829095..8534ace 100644
--- a/netinfra/dhcp/dhcpd-primary.conf
+++ b/netinfra/dhcp/dhcpd-primary.conf
@@ -110,7 +110,10 @@ subnet 192.168.0.0 netmask 255.255.252.0 {
     fixed-address 192.168.3.197;
   }
   host pfv-tsys6-oob {
-    hardware ethernet a4:ba:db:0b:df:a0;
+    # 2026-08-27 #460: was a4:ba:db:0b:df:a0 (core-switch OUI mis-migrated from
+    # pfv-netboot, never matched tsys6 iDRAC); corrected to live iDRAC6 MAC
+    # 00:21:9b:a2:7c:5b read in-band via ipmitool lan print
+    hardware ethernet 00:21:9b:a2:7c:5b;
     fixed-address 192.168.3.196;
   }
   host brother-label-printer {
diff --git a/netinfra/dhcp/dhcpd-secondary.conf b/netinfra/dhcp/dhcpd-secondary.conf
index f70ffdf..702677f 100644
--- a/netinfra/dhcp/dhcpd-secondary.conf
+++ b/netinfra/dhcp/dhcpd-secondary.conf
@@ -108,7 +108,10 @@ subnet 192.168.0.0 netmask 255.255.252.0 {
     fixed-address 192.168.3.197;
   }
   host pfv-tsys6-oob {
-    hardware ethernet a4:ba:db:0b:df:a0;
+    # 2026-08-27 #460: was a4:ba:db:0b:df:a0 (core-switch OUI mis-migrated from
+    # pfv-netboot, never matched tsys6 iDRAC); corrected to live iDRAC6 MAC
+    # 00:21:9b:a2:7c:5b read in-band via ipmitool lan print
+    hardware ethernet 00:21:9b:a2:7c:5b;
     fixed-address 192.168.3.196;
   }
   host brother-label-printer {