diff --git a/pkg/pillar/cmd/domainmgr/domainmgr.go b/pkg/pillar/cmd/domainmgr/domainmgr.go
index 7e733e7683..4e5a640076 100644
--- a/pkg/pillar/cmd/domainmgr/domainmgr.go
+++ b/pkg/pillar/cmd/domainmgr/domainmgr.go
@@ -2409,6 +2409,18 @@ func handleDNSImpl(ctxArg interface{}, key string,
 		log.Functionf("handleDNSImpl: ignoring %s", key)
 		return
 	}
+	if status.DPCKey == "" {
+		// Do not activate PhysicalIOAdapterList subscription until NIM receives
+		// a DPC and publishes corresponding DNS.
+		// NIM can publish DNS even before it receives first DPC. In such case
+		// DPCKey is empty.
+		// The goal is to avoid assigning network ports to PCIBack if they are going to be
+		// used for management purposes. This way we avoid doing unintended port assignment
+		// to PCIBack that would be shortly followed by a release, therefore mitigating
+		// the risk of race conditions between domainmgr and NIM.
+		log.Warnf("handleDNSImpl: DNS with empty DPCKey")
+		return
+	}
 	// Ignore test status and timestamps
 	// Compare Testing to save its updated value which is used by us
 	if ctx.deviceNetworkStatus.MostlyEqual(status) &&