diff --git a/net/arp/arp_acd.c b/net/arp/arp_acd.c
index 38f3acf2437..78f800d130c 100644
--- a/net/arp/arp_acd.c
+++ b/net/arp/arp_acd.c
@@ -270,7 +270,7 @@ void arp_acd_set_addr(FAR struct net_driver_s *dev)
   if (!net_ipv4addr_cmp(dev->d_ipaddr, INADDR_ANY))
     {
       dev->d_acd.need_announce = true;
-      if (IFF_IS_UP(dev->d_flags))
+      if (IFF_IS_RUNNING(dev->d_flags))
         {
           arp_acd_setup(dev);
         }
diff --git a/net/igmp/igmp_leave.c b/net/igmp/igmp_leave.c
index 75559ecf6f5..7a616ec0e9e 100644
--- a/net/igmp/igmp_leave.c
+++ b/net/igmp/igmp_leave.c
@@ -166,7 +166,7 @@ int igmp_leavegroup(struct net_driver_s *dev,
 
       /* Send a leave if the flag is set according to the state diagram */
 
-      if (IFF_IS_UP(dev->d_flags) && IS_LASTREPORT(group->flags))
+      if (IFF_IS_RUNNING(dev->d_flags) && IS_LASTREPORT(group->flags))
         {
           ninfo("Schedule Leave Group message\n");
           IGMP_STATINCR(g_netstats.igmp.leave_sched);
diff --git a/net/ipforward/ipv4_forward.c b/net/ipforward/ipv4_forward.c
index b3333d7bf27..96dc64f88df 100644
--- a/net/ipforward/ipv4_forward.c
+++ b/net/ipforward/ipv4_forward.c
@@ -371,9 +371,10 @@ static int ipv4_forward_callback(FAR struct net_driver_s *fwddev,
 
   DEBUGASSERT(fwddev != NULL);
 
-  /* Only IFF_UP device and non-loopback device need forward packet */
+  /* Only IFF_RUNNING device and non-loopback device need forward packet */
 
-  if (!IFF_IS_UP(fwddev->d_flags) || fwddev->d_lltype == NET_LL_LOOPBACK)
+  if (!IFF_IS_RUNNING(fwddev->d_flags) ||
+      fwddev->d_lltype == NET_LL_LOOPBACK)
     {
       return OK;
     }
diff --git a/net/ipforward/ipv6_forward.c b/net/ipforward/ipv6_forward.c
index bee70820e53..c56d5d8a5ef 100644
--- a/net/ipforward/ipv6_forward.c
+++ b/net/ipforward/ipv6_forward.c
@@ -361,11 +361,11 @@ static int ipv6_dev_forward(FAR struct net_driver_s *dev,
     }
 #endif
 
-  /* If the interface isn't "up", we can't forward. */
+  /* If the interface isn't "running", we can't forward. */
 
-  if ((fwddev->d_flags & IFF_UP) == 0)
+  if (IFF_IS_RUNNING(fwddev->d_flags) == 0)
     {
-      nwarn("WARNING: device is DOWN\n");
+      nwarn("WARNING: device is not running\n");
       ret = -EHOSTUNREACH;
       goto errout;
     }
@@ -510,9 +510,10 @@ static int ipv6_forward_callback(FAR struct net_driver_s *fwddev,
 
   DEBUGASSERT(fwddev != NULL);
 
-  /* Only IFF_UP device and non-loopback device need forward packet */
+  /* Only IFF_RUNNING device and non-loopback device need forward packet */
 
-  if (!IFF_IS_UP(fwddev->d_flags) || fwddev->d_lltype == NET_LL_LOOPBACK)
+  if (!IFF_IS_RUNNING(fwddev->d_flags) ||
+      fwddev->d_lltype == NET_LL_LOOPBACK)
     {
       return OK;
     }
diff --git a/net/netdev/netdown_notifier.c b/net/netdev/netdown_notifier.c
index f007c94433a..0472cc80f20 100644
--- a/net/netdev/netdown_notifier.c
+++ b/net/netdev/netdown_notifier.c
@@ -73,11 +73,11 @@ int netdown_notifier_setup(worker_t worker, FAR struct net_driver_s *dev,
 
   DEBUGASSERT(worker != NULL);
 
-  /* If network driver is already down, then return zero without setting up
-   * the notification.
+  /* If network driver is already not yet running,
+   * then return zero without setting up the notification.
    */
 
-  if ((dev->d_flags & IFF_UP) == 0)
+  if (IFF_IS_RUNNING(dev->d_flags) == 0)
     {
       return 0;
     }
diff --git a/net/procfs/netdev_statistics.c b/net/procfs/netdev_statistics.c
index 8c7211df350..48166b3cd55 100644
--- a/net/procfs/netdev_statistics.c
+++ b/net/procfs/netdev_statistics.c
@@ -191,7 +191,7 @@ static int netprocfs_linklayer(FAR struct netprocfs_file_s *netfile)
 
   /* Get the interface status:  RUNNING, UP, or DOWN */
 
-  if ((dev->d_flags & IFF_RUNNING) != 0)
+  if (IFF_IS_RUNNING(dev->d_flags) != 0)
     {
       status = "RUNNING";
     }
diff --git a/net/udp/udp_sendto_buffered.c b/net/udp/udp_sendto_buffered.c
index d78dd2bf041..3ca2f142e39 100644
--- a/net/udp/udp_sendto_buffered.c
+++ b/net/udp/udp_sendto_buffered.c
@@ -295,9 +295,9 @@ static int sendto_next_transfer(FAR struct udp_conn_s *conn)
 
   /* Make sure that the device is in the UP state */
 
-  if ((dev->d_flags & IFF_UP) == 0)
+  if (IFF_IS_RUNNING(dev->d_flags) == 0)
     {
-      nwarn("WARNING: device is DOWN\n");
+      nwarn("WARNING: device is not RUNNING\n");
       return -EHOSTUNREACH;
     }
 
diff --git a/net/udp/udp_sendto_unbuffered.c b/net/udp/udp_sendto_unbuffered.c
index c6540a26f38..a8c469fb198 100644
--- a/net/udp/udp_sendto_unbuffered.c
+++ b/net/udp/udp_sendto_unbuffered.c
@@ -457,9 +457,9 @@ ssize_t psock_udp_sendto(FAR struct socket *psock, FAR const void *buf,
 
   /* Make sure that the device is in the UP state */
 
-  if ((state.st_dev->d_flags & IFF_UP) == 0)
+  if (IFF_IS_RUNNING(state.st_dev->d_flags) == 0)
     {
-      nwarn("WARNING: device is DOWN\n");
+      nwarn("WARNING: device is not running\n");
       return -EHOSTUNREACH;
     }