diff --git a/CHANGELOG b/CHANGELOG
index cdf1579a..ce690d23 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -19,6 +19,11 @@ HISTORY
 
   ++ New features:
 
+  2007-05-18 Simon Goldschmidt
+  * netif.h, ethernetif.c, slipif.c, loopif.c: Added define
+    NETIF_INIT_SNMP(type, speed) to initialize per-netif snmp variables, added
+    initialization of those to slipif and loopif.
+
   2007-05-18 Simon Goldschmidt
   * opt.h, ip_frag.c, ip_frag.h, ip.c: Added option IP_FRAG_USES_STATIC_BUF
     (defaulting to off for now) that can be set to 0 to send fragmented
diff --git a/src/include/lwip/netif.h b/src/include/lwip/netif.h
index 562e9a1a..9cacb13a 100644
--- a/src/include/lwip/netif.h
+++ b/src/include/lwip/netif.h
@@ -150,6 +150,26 @@ struct netif {
 #endif /* LWIP_IGMP */
 };
 
+#if LWIP_SNMP
+#define NETIF_INIT_SNMP(type, speed) \
+  /* ifType ethernetCsmacd(6) @see RFC1213 */ \
+  netif->link_type = type;    \
+  /* your link speed here */  \
+  netif->link_speed = speed;  \
+  netif->ts = 0;              \
+  netif->ifinoctets = 0;      \
+  netif->ifinucastpkts = 0;   \
+  netif->ifinnucastpkts = 0;  \
+  netif->ifindiscards = 0;    \
+  netif->ifoutoctets = 0;     \
+  netif->ifoutucastpkts = 0;  \
+  netif->ifoutnucastpkts = 0; \
+  netif->ifoutdiscards = 0
+#else /* LWIP_SNMP */
+#define NETIF_INIT_SNMP(type, speed)
+#endif /* LWIP_SNMP */
+
+
 /** The list of network interfaces. */
 extern struct netif *netif_list;
 /** The default network interface. */
diff --git a/src/netif/ethernetif.c b/src/netif/ethernetif.c
index e044dcf2..ad1900c3 100644
--- a/src/netif/ethernetif.c
+++ b/src/netif/ethernetif.c
@@ -341,22 +341,9 @@ ethernetif_init(struct netif *netif)
   netif->hostname = "lwip";
 #endif /* LWIP_NETIF_HOSTNAME */
 
-#if LWIP_SNMP
   /* initialize the snmp variables and counters inside the struct netif */
   /* ifType ethernetCsmacd(6) @see RFC1213 */
-  netif->link_type = 6;
-  /* your link speed here */
-  netif->link_speed = ;
-  netif->ts = 0;
-  netif->ifinoctets = 0;
-  netif->ifinucastpkts = 0;
-  netif->ifinnucastpkts = 0;
-  netif->ifindiscards = 0;
-  netif->ifoutoctets = 0;
-  netif->ifoutucastpkts = 0;
-  netif->ifoutnucastpkts = 0;
-  netif->ifoutdiscards = 0;
-#endif  /* LWIP_SNMP */
+  NETIF_INIT_SNMP(6, ???);
 
   netif->state = ethernetif;
   netif->name[0] = IFNAME0;
diff --git a/src/netif/loopif.c b/src/netif/loopif.c
index 982404a5..91777b50 100644
--- a/src/netif/loopif.c
+++ b/src/netif/loopif.c
@@ -196,6 +196,12 @@ loopif_init(struct netif *netif)
   netif->state = priv;
 #endif /* LWIP_LOOPIF_MULTITHREADING */
 
+  /* initialize the snmp variables and counters inside the struct netif
+   * ifType: softwareLoopback(24) @see RFC1213
+   * ifSpeed: no assumption can be made!
+   */
+  NETIF_INIT_SNMP(24, 0);
+
   netif->name[0] = 'l';
   netif->name[1] = 'o';
   netif->output = loopif_output;
diff --git a/src/netif/slipif.c b/src/netif/slipif.c
index 9d39cfe0..9b3c43c3 100644
--- a/src/netif/slipif.c
+++ b/src/netif/slipif.c
@@ -253,6 +253,13 @@ slipif_init(struct netif *netif)
     return ERR_IF;
   }
 
+  /* initialize the snmp variables and counters inside the struct netif
+   * ifType: we're using propPointToPointSerial(22) @see RFC1213
+   * ifSpeed: no assumption can be made without knowing more about the
+   * serial line!
+   */
+  NETIF_INIT_SNMP(22, 0);
+
   /* Create a thread to poll the serial line. */
   sys_thread_new(slipif_loop, netif, SLIPIF_THREAD_PRIO);
   return ERR_OK;