diff --git a/vtysh/Makefile.am b/vtysh/Makefile.am
index 95f8f7f..9118350 100644
--- a/vtysh/Makefile.am
+++ b/vtysh/Makefile.am
@@ -18,13 +18,13 @@
 EXTRA_DIST = extract.pl
 
 rebuild4:
-	./extract.pl $(top_srcdir)/zebra/*.c $(top_srcdir)/ripd/*.c $(top_srcdir)/ospfd/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/lib/keychain.c $(top_srcdir)/lib/routemap.c $(top_srcdir)/lib/filter.c $(top_srcdir)/lib/plist.c $(top_srcdir)/lib/distribute.c $(top_srcdir)/lib/if_rmap.c > vtysh_cmd.c
+	./extract.pl $(top_srcdir)/zebra/*.c $(top_srcdir)/ripd/*.c $(top_srcdir)/ospfd/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/isisd/*.c $(top_srcdir)/lib/keychain.c $(top_srcdir)/lib/routemap.c $(top_srcdir)/lib/filter.c $(top_srcdir)/lib/plist.c $(top_srcdir)/lib/distribute.c $(top_srcdir)/lib/if_rmap.c > vtysh_cmd.c
 
 vtysh_cmd.c: $(top_srcdir)/zebra/*.c $(top_srcdir)/ripd/*.c $(top_srcdir)/ripngd/*.c $(top_srcdir)/ospfd/*.c \
-     $(top_srcdir)/ospf6d/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/lib/keychain.c $(top_srcdir)/lib/routemap.c \
+     $(top_srcdir)/ospf6d/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/isisd/*.c $(top_srcdir)/lib/keychain.c $(top_srcdir)/lib/routemap.c \
      $(top_srcdir)/lib/filter.c $(top_srcdir)/lib/plist.c $(top_srcdir)/lib/distribute.c $(top_srcdir)/lib/if_rmap.c
 	$(srcdir)/extract.pl $(top_srcdir)/zebra/*.c $(top_srcdir)/ripd/*.c $(top_srcdir)/ripngd/*.c $(top_srcdir)/ospfd/*.c \
-          $(top_srcdir)/ospf6d/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/lib/keychain.c $(top_srcdir)/lib/routemap.c \
-          $(top_srcdir)/lib/filter.c $(top_srcdir)/lib/plist.c $(top_srcdir)/lib/distribute.c \
+          $(top_srcdir)/ospf6d/*.c $(top_srcdir)/isisd/*.c $(top_srcdir)/bgpd/*.c $(top_srcdir)/lib/keychain.c \
+          $(top_srcdir)/lib/routemap.c $(top_srcdir)/lib/filter.c $(top_srcdir)/lib/plist.c $(top_srcdir)/lib/distribute.c \
           $(top_srcdir)/lib/if_rmap.c > vtysh_cmd.c
 
diff --git a/vtysh/extract.pl b/vtysh/extract.pl
index 9a65f14..cb5ca36 100755
--- a/vtysh/extract.pl
+++ b/vtysh/extract.pl
@@ -37,6 +37,7 @@
 $ignore{'"router ospf6"'} = "ignore";
 $ignore{'"router bgp <1-65535>"'} = "ignore";
 $ignore{'"router bgp <1-65535> view WORD"'} = "ignore";
+$ignore{'"router isis WORD"'} = "ignore";
 $ignore{'"address-family ipv4"'} = "ignore";
 $ignore{'"address-family ipv4 (unicast|multicast)"'} = "ignore";
 $ignore{'"address-family ipv6"'} = "ignore";
diff --git a/vtysh/vtysh.c b/vtysh/vtysh.c
index e9c784a..36b7c58 100644
--- a/vtysh/vtysh.c
+++ b/vtysh/vtysh.c
@@ -423,6 +423,8 @@
 	    if (cmd_stat != CMD_WARNING)
 	      cmd_stat = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_BGP],
 					       line, fp);
+      if (cmd_stat != CMD_WARNING)
+        cmd_stat = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_ISIS], line, fp);
 	    if (cmd_stat)
 	      {
                 line = "end";
@@ -478,6 +480,10 @@
 	  if (vtysh_client_execute (&vtysh_client[VTYSH_INDEX_BGP], line, fp)
 	      != CMD_SUCCESS)
 	    break;
+  if (cmd->daemon & VTYSH_ISISD)
+    if (vtysh_client_execute (&vtysh_client[VTYSH_INDEX_ISIS], line, fp)
+        != CMD_SUCCESS)
+      break;
 	if (cmd->func)
 	  (*cmd->func) (cmd, vty, 0, NULL);
       }
@@ -598,6 +604,10 @@
 	      if (vtysh_client_execute (&vtysh_client[VTYSH_INDEX_BGP],
 					vty->buf, stdout) != CMD_SUCCESS)
 		break;
+      if (cmd->daemon & VTYSH_ISISD)
+        if (vtysh_client_execute (&vtysh_client[VTYSH_INDEX_ISIS],
+          vty->buf, stdout) != CMD_SUCCESS)
+    break;
 	    if (cmd->func)
 	      (*cmd->func) (cmd, vty, 0, NULL);
 	  }
@@ -784,6 +794,14 @@
   "%s(config-router)# ",
 };
 
+/* ISIS node structure. */
+struct cmd_node isis_node =
+{
+  ISIS_NODE,
+  "%s(config-router)# ",
+  1
+};
+
 struct cmd_node interface_node =
 {
   INTERFACE_NODE,
@@ -939,6 +957,18 @@
   return CMD_SUCCESS;
 }
 
+DEFUNSH (VTYSH_ISISD,
+   router_isis,
+   router_isis_cmd,
+   "router isis WORD",
+   ROUTER_STR
+   "ISO IS-IS\n"
+   "ISO Routing area tag")
+{
+  vty->node = ISIS_NODE;
+  return CMD_SUCCESS;
+}
+
 DEFUNSH (VTYSH_RMAP,
 	 route_map,
 	 route_map_cmd,
@@ -1007,6 +1037,7 @@
     case RIPNG_NODE:
     case OSPF_NODE:
     case OSPF6_NODE:
+    case ISIS_NODE:
     case MASC_NODE:
     case RMAP_NODE:
     case VTY_NODE:
@@ -1154,7 +1185,21 @@
        "quit",
        "Exit current mode and down to previous mode\n")
 
-DEFUNSH (VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D,
+DEFUNSH (VTYSH_ISISD,
+    vtysh_exit_isisd,
+    vtysh_exit_isisd_cmd,
+    "exit",
+    "Exit current mode and down to previous mode\n")
+{
+  return vtysh_exit (vty);
+}
+
+ALIAS (vtysh_exit_isisd,
+       vtysh_quit_isisd_cmd,
+       "quit",
+       "Exit current mode and down to previous mode\n")
+
+DEFUNSH (VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D|VTYSH_ISISD,
 	 vtysh_interface,
 	 vtysh_interface_cmd,
 	 "interface IFNAME",
@@ -1184,7 +1229,7 @@
        NO_STR
        "Interface specific description\n")
 
-DEFUNSH (VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D,
+DEFUNSH (VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D|VTYSH_ISISD,
 	 vtysh_exit_interface,
 	 vtysh_exit_interface_cmd,
 	 "exit",
@@ -1232,6 +1277,7 @@
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_OSPF], line);
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_OSPF6], line);
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_BGP], line);
+  ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_ISIS], line);
 
   vtysh_config_dump (fp);
 
@@ -1319,6 +1365,7 @@
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_OSPF], line);
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_OSPF6], line);
   ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_BGP], line);
+  ret = vtysh_client_config (&vtysh_client[VTYSH_INDEX_ISIS], line);
 
   vtysh_config_dump (fp);
 
@@ -1364,6 +1411,7 @@
   ret = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_OSPF], line, stdout);
   ret = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_OSPF6], line, stdout);
   ret = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_BGP], line, stdout);
+  ret = vtysh_client_execute (&vtysh_client[VTYSH_INDEX_ISIS], line, stdout);
 
   fprintf (stdout,"[OK]\n");
 
@@ -1713,6 +1761,7 @@
   vtysh_connect (&vtysh_client[VTYSH_INDEX_OSPF], OSPF_VTYSH_PATH);
   vtysh_connect (&vtysh_client[VTYSH_INDEX_OSPF6], OSPF6_VTYSH_PATH);
   vtysh_connect (&vtysh_client[VTYSH_INDEX_BGP], BGP_VTYSH_PATH);
+  vtysh_connect (&vtysh_client[VTYSH_INDEX_ISIS], ISIS_VTYSH_PATH);
 }
 
 
@@ -1786,6 +1835,7 @@
 /* #endif */
   install_node (&keychain_node, NULL);
   install_node (&keychain_key_node, NULL);
+  install_node (&isis_node, NULL);
 
   vtysh_install_default (VIEW_NODE);
   vtysh_install_default (ENABLE_NODE);
@@ -1802,6 +1852,7 @@
   vtysh_install_default (OSPF_NODE);
   vtysh_install_default (RIPNG_NODE);
   vtysh_install_default (OSPF6_NODE);
+  vtysh_install_default (ISIS_NODE);
   vtysh_install_default (KEYCHAIN_NODE);
   vtysh_install_default (KEYCHAIN_KEY_NODE);
 
@@ -1834,6 +1885,8 @@
   install_element (BGP_IPV4M_NODE, &vtysh_quit_bgpd_cmd);
   install_element (BGP_IPV6_NODE, &vtysh_exit_bgpd_cmd);
   install_element (BGP_IPV6_NODE, &vtysh_quit_bgpd_cmd);
+  install_element (ISIS_NODE, &vtysh_exit_isisd_cmd);
+  install_element (ISIS_NODE, &vtysh_quit_isisd_cmd);
   install_element (KEYCHAIN_NODE, &vtysh_exit_ripd_cmd);
   install_element (KEYCHAIN_NODE, &vtysh_quit_ripd_cmd);
   install_element (KEYCHAIN_KEY_NODE, &vtysh_exit_ripd_cmd);
@@ -1853,6 +1906,7 @@
   install_element (BGP_IPV4M_NODE, &vtysh_end_all_cmd);
   install_element (BGP_VPNV4_NODE, &vtysh_end_all_cmd);
   install_element (BGP_IPV6_NODE, &vtysh_end_all_cmd);
+  install_element (ISIS_NODE, &vtysh_end_all_cmd);
   install_element (KEYCHAIN_NODE, &vtysh_end_all_cmd);
   install_element (KEYCHAIN_KEY_NODE, &vtysh_end_all_cmd);
   install_element (RMAP_NODE, &vtysh_end_all_cmd);
@@ -1870,6 +1924,7 @@
 #ifdef HAVE_IPV6
   install_element (CONFIG_NODE, &router_ospf6_cmd);
 #endif
+  install_element (CONFIG_NODE, &router_isis_cmd);
   install_element (CONFIG_NODE, &router_bgp_cmd);
   install_element (BGP_NODE, &address_family_vpnv4_cmd);
   install_element (BGP_NODE, &address_family_vpnv4_unicast_cmd);
@@ -1907,6 +1962,7 @@
   install_element (RIPNG_NODE, &vtysh_write_terminal_cmd);
   install_element (OSPF_NODE, &vtysh_write_terminal_cmd);
   install_element (OSPF6_NODE, &vtysh_write_terminal_cmd);
+  install_element (ISIS_NODE, &vtysh_write_terminal_cmd);
   install_element (INTERFACE_NODE, &vtysh_write_terminal_cmd);
   install_element (RMAP_NODE, &vtysh_write_terminal_cmd);
   install_element (KEYCHAIN_NODE, &vtysh_write_terminal_cmd);
@@ -1924,6 +1980,7 @@
   install_element (RIPNG_NODE, &vtysh_write_memory_cmd);
   install_element (OSPF_NODE, &vtysh_write_memory_cmd);
   install_element (OSPF6_NODE, &vtysh_write_memory_cmd);
+  install_element (ISIS_NODE, &vtysh_write_memory_cmd);
   install_element (INTERFACE_NODE, &vtysh_write_memory_cmd);
   install_element (RMAP_NODE, &vtysh_write_memory_cmd);
   install_element (KEYCHAIN_NODE, &vtysh_write_memory_cmd);
diff --git a/vtysh/vtysh.h b/vtysh/vtysh.h
index 08184df..5ccf41a 100644
--- a/vtysh/vtysh.h
+++ b/vtysh/vtysh.h
@@ -28,7 +28,8 @@
 #define VTYSH_OSPFD  0x08
 #define VTYSH_OSPF6D 0x10
 #define VTYSH_BGPD   0x20
-#define VTYSH_ALL    VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D|VTYSH_BGPD
+#define VTYSH_ISISD  0x40
+#define VTYSH_ALL    VTYSH_ZEBRA|VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D|VTYSH_BGPD|VTYSH_ISISD
 #define VTYSH_RMAP   VTYSH_RIPD|VTYSH_RIPNGD|VTYSH_OSPFD|VTYSH_OSPF6D|VTYSH_BGPD
 
 #define VTYSH_INDEX_ZEBRA 0
@@ -37,7 +38,8 @@
 #define VTYSH_INDEX_OSPF  3
 #define VTYSH_INDEX_OSPF6 4
 #define VTYSH_INDEX_BGP   5
-#define VTYSH_INDEX_MAX   6
+#define VTYSH_INDEX_ISIS  6
+#define VTYSH_INDEX_MAX   7
 
 /* vtysh local configuration file. */
 #define VTYSH_DEFAULT_CONFIG "vtysh.conf"
diff --git a/vtysh/vtysh_config.c b/vtysh/vtysh_config.c
index a307d5c..28af1ca 100644
--- a/vtysh/vtysh_config.c
+++ b/vtysh/vtysh_config.c
@@ -191,6 +191,8 @@
    config = config_get (OSPF6_NODE, line);
       else if (strncmp (line, "router bgp", strlen ("router bgp")) == 0)
 	config = config_get (BGP_NODE, line);
+      else if (strncmp (line, "router isis", strlen ("router bgp")) == 0)
+  	config = config_get (ISIS_NODE, line);
       else if (strncmp (line, "router", strlen ("router")) == 0)
 	config = config_get (BGP_NODE, line);
       else if (strncmp (line, "route-map", strlen ("route-map")) == 0)