diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c
index 16102e5..93a13f8 100644
--- a/zebra/zebra_rib.c
+++ b/zebra/zebra_rib.c
@@ -54,6 +54,7 @@
   {ZEBRA_ROUTE_RIPNG,   120},
   {ZEBRA_ROUTE_OSPF,    110},
   {ZEBRA_ROUTE_OSPF6,   110},
+  {ZEBRA_ROUTE_ISIS,    115},
   {ZEBRA_ROUTE_BGP,      20  /* IBGP is 200. */}
 };
 
diff --git a/zebra/zebra_vty.c b/zebra/zebra_vty.c
index ebb3694..4bcd29f 100644
--- a/zebra/zebra_vty.c
+++ b/zebra/zebra_vty.c
@@ -49,6 +49,8 @@
       return "ospf";
     case ZEBRA_ROUTE_OSPF6:
       return "ospf";
+    case ZEBRA_ROUTE_ISIS:
+      return "isis";
     case ZEBRA_ROUTE_BGP:
       return "bgp";
     default:
@@ -78,6 +80,8 @@
       return 'O';
     case ZEBRA_ROUTE_OSPF6:
       return 'O';
+    case ZEBRA_ROUTE_ISIS:
+      return 'I';
     case ZEBRA_ROUTE_BGP:
       return 'B';
     default:
@@ -558,6 +562,7 @@
 #define ONE_WEEK_SECOND 60*60*24*7
       if (rib->type == ZEBRA_ROUTE_RIP
 	  || rib->type == ZEBRA_ROUTE_OSPF
+	  || rib->type == ZEBRA_ROUTE_ISIS
 	  || rib->type == ZEBRA_ROUTE_BGP)
 	{
 	  time_t uptime;
@@ -721,6 +726,7 @@
 
       if (rib->type == ZEBRA_ROUTE_RIP
 	  || rib->type == ZEBRA_ROUTE_OSPF
+	  || rib->type == ZEBRA_ROUTE_ISIS
 	  || rib->type == ZEBRA_ROUTE_BGP)
 	{
 	  time_t uptime;
@@ -748,7 +754,7 @@
     }
 }
 
-#define SHOW_ROUTE_V4_HEADER "Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,%s       B - BGP, > - selected route, * - FIB route%s%s"
+#define SHOW_ROUTE_V4_HEADER "Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,%s       I - ISIS, B - BGP, > - selected route, * - FIB route%s%s"
 
 DEFUN (show_ip_route,
        show_ip_route_cmd,
@@ -874,6 +880,7 @@
        "Connected\n"
        "Kernel\n"
        "Open Shortest Path First (OSPF)\n"
+       "ISO IS-IS (ISIS)\n"
        "Routing Information Protocol (RIP)\n"
        "Static routes\n")
 {
@@ -891,6 +898,8 @@
     type = ZEBRA_ROUTE_KERNEL;
   else if (strncmp (argv[0], "o", 1) == 0)
     type = ZEBRA_ROUTE_OSPF;
+  else if (strncmp (argv[0], "i", 1) == 0)
+    type = ZEBRA_ROUTE_ISIS;
   else if (strncmp (argv[0], "r", 1) == 0)
     type = ZEBRA_ROUTE_RIP;
   else if (strncmp (argv[0], "s", 1) == 0)
@@ -1437,6 +1446,7 @@
 #define ONE_WEEK_SECOND 60*60*24*7
       if (rib->type == ZEBRA_ROUTE_RIPNG
 	  || rib->type == ZEBRA_ROUTE_OSPF6
+	  || rib->type == ZEBRA_ROUTE_ISIS
 	  || rib->type == ZEBRA_ROUTE_BGP)
 	{
 	  time_t uptime;
@@ -1615,6 +1625,7 @@
       
       if (rib->type == ZEBRA_ROUTE_RIPNG
 	  || rib->type == ZEBRA_ROUTE_OSPF6
+	  || rib->type == ZEBRA_ROUTE_ISIS
 	  || rib->type == ZEBRA_ROUTE_BGP)
 	{
 	  time_t uptime;
@@ -1642,7 +1653,7 @@
     }
 }
 
-#define SHOW_ROUTE_V6_HEADER "Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,%s       B - BGP, * - FIB route.%s%s"
+#define SHOW_ROUTE_V6_HEADER "Codes: K - kernel route, C - connected, S - static, R - RIPng, O - OSPFv3,%s       I - ISIS, B - BGP, * - FIB route.%s%s"
 
 DEFUN (show_ipv6_route,
        show_ipv6_route_cmd,
@@ -1726,6 +1737,7 @@
        "Connected\n"
        "Kernel\n"
        "Open Shortest Path First (OSPFv3)\n"
+       "ISO IS-IS (ISIS)\n"
        "Routing Information Protocol (RIPng)\n"
        "Static routes\n")
 {
@@ -1743,6 +1755,8 @@
     type = ZEBRA_ROUTE_KERNEL;
   else if (strncmp (argv[0], "o", 1) == 0)
     type = ZEBRA_ROUTE_OSPF6;
+  else if (strncmp (argv[0], "i", 1) == 0)
+    type = ZEBRA_ROUTE_ISIS;
   else if (strncmp (argv[0], "r", 1) == 0)
     type = ZEBRA_ROUTE_RIPNG;
   else if (strncmp (argv[0], "s", 1) == 0)