release/src/router/zebra/ospf6d/ospf6_top.c

   1 /*
   2  * Copyright (C) 2003 Yasuhiro Ohara
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <zebra.h>
  23
  24 #include "log.h"
  25 #include "memory.h"
  26 #include "vty.h"
  27 #include "linklist.h"
  28 #include "prefix.h"
  29 #include "table.h"
  30 #include "thread.h"
  31 #include "command.h"
  32
  33 #include "ospf6_proto.h"
  34 #include "ospf6_message.h"
  35 #include "ospf6_lsa.h"
  36 #include "ospf6_lsdb.h"
  37 #include "ospf6_route.h"
  38 #include "ospf6_zebra.h"
  39
  40 #include "ospf6_top.h"
  41 #include "ospf6_area.h"
  42 #include "ospf6_interface.h"
  43 #include "ospf6_neighbor.h"
  44
  45 #include "ospf6_flood.h"
  46 #include "ospf6_asbr.h"
  47 #include "ospf6_abr.h"
  48 #include "ospf6_intra.h"
  49 #include "ospf6d.h"
  50
  51 /* global ospf6d variable */
  52 struct ospf6 *ospf6;
  53
  54 void
  55 ospf6_top_lsdb_hook_add (struct ospf6_lsa *lsa)
  56 {
  57   switch (ntohs (lsa->header->type))
  58     {
  59       case OSPF6_LSTYPE_AS_EXTERNAL:
  60         ospf6_asbr_lsa_add (lsa);
  61         break;
  62
  63       default:
  64         break;
  65     }
  66 }
  67
  68 void
  69 ospf6_top_lsdb_hook_remove (struct ospf6_lsa *lsa)
  70 {
  71   switch (ntohs (lsa->header->type))
  72     {
  73       case OSPF6_LSTYPE_AS_EXTERNAL:
  74         ospf6_asbr_lsa_remove (lsa);
  75         break;
  76
  77       default:
  78         break;
  79     }
  80 }
  81
  82 void
  83 ospf6_top_route_hook_add (struct ospf6_route *route)
  84 {
  85   ospf6_abr_originate_summary (route);
  86   ospf6_zebra_route_update_add (route);
  87 }
  88
  89 void
  90 ospf6_top_route_hook_remove (struct ospf6_route *route)
  91 {
  92   ospf6_abr_originate_summary (route);
  93   ospf6_zebra_route_update_remove (route);
  94 }
  95
  96 void
  97 ospf6_top_brouter_hook_add (struct ospf6_route *route)
  98 {
  99   ospf6_abr_examin_brouter (ADV_ROUTER_IN_PREFIX (&route->prefix));
 100   ospf6_asbr_lsentry_add (route);
 101   ospf6_abr_originate_summary (route);
 102 }
 103
 104 void
 105 ospf6_top_brouter_hook_remove (struct ospf6_route *route)
 106 {
 107   ospf6_abr_examin_brouter (ADV_ROUTER_IN_PREFIX (&route->prefix));
 108   ospf6_asbr_lsentry_remove (route);
 109   ospf6_abr_originate_summary (route);
 110 }
 111
 112 struct ospf6 *
 113 ospf6_create ()
 114 {
 115   struct ospf6 *o;
 116
 117   o = XMALLOC (MTYPE_OSPF6_TOP, sizeof (struct ospf6));
 118   memset (o, 0, sizeof (struct ospf6));
 119
 120   /* initialize */
 121   gettimeofday (&o->starttime, (struct timezone *) NULL);
 122   o->area_list = list_new ();
 123   o->area_list->cmp = ospf6_area_cmp;
 124   o->lsdb = ospf6_lsdb_create (o);
 125   o->lsdb_self = ospf6_lsdb_create (o);
 126   o->lsdb->hook_add = ospf6_top_lsdb_hook_add;
 127   o->lsdb->hook_remove = ospf6_top_lsdb_hook_remove;
 128
 129   o->route_table = ospf6_route_table_create ();
 130   o->route_table->hook_add = ospf6_top_route_hook_add;
 131   o->route_table->hook_remove = ospf6_top_route_hook_remove;
 132
 133   o->brouter_table = ospf6_route_table_create ();
 134   o->brouter_table->hook_add = ospf6_top_brouter_hook_add;
 135   o->brouter_table->hook_remove = ospf6_top_brouter_hook_remove;
 136
 137   o->external_table = ospf6_route_table_create ();
 138   o->external_id_table = route_table_init ();
 139
 140   return o;
 141 }
 142
 143 void
 144 ospf6_delete (struct ospf6 *o)
 145 {
 146   listnode i;
 147   struct ospf6_area *oa;
 148
 149   for (i = listhead (o->area_list); i; nextnode (i))
 150     {
 151       oa = (struct ospf6_area *) getdata (i);
 152       ospf6_area_delete (oa);
 153     }
 154
 155   ospf6_lsdb_delete (o->lsdb);
 156   ospf6_lsdb_delete (o->lsdb_self);
 157
 158   ospf6_route_table_delete (o->route_table);
 159   ospf6_route_table_delete (o->brouter_table);
 160
 161   ospf6_route_table_delete (o->external_table);
 162   route_table_finish (o->external_id_table);
 163
 164   XFREE (MTYPE_OSPF6_TOP, o);
 165 }
 166
 167 void
 168 ospf6_enable (struct ospf6 *o)
 169 {
 170   listnode i;
 171   struct ospf6_area *oa;
 172
 173   if (CHECK_FLAG (o->flag, OSPF6_DISABLED))
 174     {
 175       UNSET_FLAG (o->flag, OSPF6_DISABLED);
 176       for (i = listhead (o->area_list); i; nextnode (i))
 177         {
 178           oa = (struct ospf6_area *) getdata (i);
 179           ospf6_area_enable (oa);
 180         }
 181     }
 182 }
 183
 184 void
 185 ospf6_disable (struct ospf6 *o)
 186 {
 187   listnode i;
 188   struct ospf6_area *oa;
 189
 190   if (! CHECK_FLAG (o->flag, OSPF6_DISABLED))
 191     {
 192       SET_FLAG (o->flag, OSPF6_DISABLED);
 193       for (i = listhead (o->area_list); i; nextnode (i))
 194         {
 195           oa = (struct ospf6_area *) getdata (i);
 196           ospf6_area_disable (oa);
 197         }
 198
 199       ospf6_lsdb_remove_all (o->lsdb);
 200       ospf6_route_remove_all (o->route_table);
 201       ospf6_route_remove_all (o->brouter_table);
 202     }
 203 }
 204
 205 int
 206 ospf6_maxage_remover (struct thread *thread)
 207 {
 208   struct ospf6 *o = (struct ospf6 *) THREAD_ARG (thread);
 209   struct ospf6_area *oa;
 210   struct ospf6_interface *oi;
 211   struct ospf6_neighbor *on;
 212   listnode i, j, k;
 213
 214   o->maxage_remover = (struct thread *) NULL;
 215
 216   for (i = listhead (o->area_list); i; nextnode (i))
 217     {
 218       oa = (struct ospf6_area *) getdata (i);
 219       for (j = listhead (oa->if_list); j; nextnode (j))
 220         {
 221           oi = (struct ospf6_interface *) getdata (j);
 222           for (k = listhead (oi->neighbor_list); k; nextnode (k))
 223             {
 224               on = (struct ospf6_neighbor *) getdata (k);
 225               if (on->state != OSPF6_NEIGHBOR_EXCHANGE &&
 226                   on->state != OSPF6_NEIGHBOR_LOADING)
 227                 continue;
 228
 229               return 0;
 230             }
 231         }
 232     }
 233
 234   for (i = listhead (o->area_list); i; nextnode (i))
 235     {
 236       oa = (struct ospf6_area *) getdata (i);
 237       for (j = listhead (oa->if_list); j; nextnode (j))
 238         {
 239           oi = (struct ospf6_interface *) getdata (j);
 240           OSPF6_LSDB_MAXAGE_REMOVER (oi->lsdb);
 241         }
 242       OSPF6_LSDB_MAXAGE_REMOVER (oa->lsdb);
 243     }
 244   OSPF6_LSDB_MAXAGE_REMOVER (o->lsdb);
 245
 246   return 0;
 247 }
 248
 249 void
 250 ospf6_maxage_remove (struct ospf6 *o)
 251 {
 252   if (o && ! o->maxage_remover)
 253     o->maxage_remover = thread_add_event (master, ospf6_maxage_remover, o, 0);
 254 }
 255
 256 /* start ospf6 */
 257 DEFUN (router_ospf6,
 258        router_ospf6_cmd,
 259        "router ospf6",
 260        ROUTER_STR
 261        OSPF6_STR)
 262 {
 263   if (ospf6 == NULL)
 264     ospf6 = ospf6_create ();
 265   if (CHECK_FLAG (ospf6->flag, OSPF6_DISABLED))
 266     ospf6_enable (ospf6);
 267
 268   /* set current ospf point. */
 269   vty->node = OSPF6_NODE;
 270   vty->index = ospf6;
 271
 272   return CMD_SUCCESS;
 273 }
 274
 275 /* stop ospf6 */
 276 DEFUN (no_router_ospf6,
 277        no_router_ospf6_cmd,
 278        "no router ospf6",
 279        NO_STR
 280        OSPF6_ROUTER_STR)
 281 {
 282   if (ospf6 == NULL || CHECK_FLAG (ospf6->flag, OSPF6_DISABLED))
 283     vty_out (vty, "OSPFv3 is not running%s", VNL);
 284   else
 285     ospf6_disable (ospf6);
 286
 287   /* return to config node . */
 288   vty->node = CONFIG_NODE;
 289   vty->index = NULL;
 290
 291   return CMD_SUCCESS;
 292 }
 293
 294 /* change Router_ID commands. */
 295 DEFUN (ospf6_router_id,
 296        ospf6_router_id_cmd,
 297        "router-id A.B.C.D",
 298        "Configure OSPF Router-ID\n"
 299        V4NOTATION_STR)
 300 {
 301   int ret;
 302   u_int32_t router_id;
 303   struct ospf6 *o;
 304
 305   o = (struct ospf6 *) vty->index;
 306
 307   ret = inet_pton (AF_INET, argv[0], &router_id);
 308   if (ret == 0)
 309     {
 310       vty_out (vty, "malformed OSPF Router-ID: %s%s", argv[0], VNL);
 311       return CMD_SUCCESS;
 312     }
 313
 314   o->router_id = router_id;
 315   return CMD_SUCCESS;
 316 }
 317
 318 DEFUN (ospf6_interface_area,
 319        ospf6_interface_area_cmd,
 320        "interface IFNAME area A.B.C.D",
 321        "Enable routing on an IPv6 interface\n"
 322        IFNAME_STR
 323        "Specify the OSPF6 area ID\n"
 324        "OSPF6 area ID in IPv4 address notation\n"
 325       )
 326 {
 327   struct ospf6 *o;
 328   struct ospf6_area *oa;
 329   struct ospf6_interface *oi;
 330   struct interface *ifp;
 331   u_int32_t area_id;
 332
 333   o = (struct ospf6 *) vty->index;
 334
 335   /* find/create ospf6 interface */
 336   ifp = if_get_by_name (argv[0]);
 337   oi = (struct ospf6_interface *) ifp->info;
 338   if (oi == NULL)
 339     oi = ospf6_interface_create (ifp);
 340   if (oi->area)
 341     {
 342       vty_out (vty, "%s already attached to Area %s%s",
 343                oi->interface->name, oi->area->name, VNL);
 344       return CMD_SUCCESS;
 345     }
 346
 347   /* parse Area-ID */
 348   if (inet_pton (AF_INET, argv[1], &area_id) != 1)
 349     {
 350       vty_out (vty, "Invalid Area-ID: %s%s", argv[1], VNL);
 351       return CMD_SUCCESS;
 352     }
 353
 354   /* find/create ospf6 area */
 355   oa = ospf6_area_lookup (area_id, o);
 356   if (oa == NULL)
 357     oa = ospf6_area_create (area_id, o);
 358
 359   /* attach interface to area */
 360   listnode_add (oa->if_list, oi); /* sort ?? */
 361   oi->area = oa;
 362
 363   SET_FLAG (oa->flag, OSPF6_AREA_ENABLE);
 364
 365   /* start up */
 366   thread_add_event (master, interface_up, oi, 0);
 367
 368   /* If the router is ABR, originate summary routes */
 369   if (ospf6_is_router_abr (o))
 370     ospf6_abr_enable_area (oa);
 371
 372   return CMD_SUCCESS;
 373 }
 374
 375 DEFUN (no_ospf6_interface_area,
 376        no_ospf6_interface_area_cmd,
 377        "no interface IFNAME area A.B.C.D",
 378        NO_STR
 379        "Disable routing on an IPv6 interface\n"
 380        IFNAME_STR
 381        "Specify the OSPF6 area ID\n"
 382        "OSPF6 area ID in IPv4 address notation\n"
 383        )
 384 {
 385   struct ospf6 *o;
 386   struct ospf6_interface *oi;
 387   struct ospf6_area *oa;
 388   struct interface *ifp;
 389   u_int32_t area_id;
 390
 391   o = (struct ospf6 *) vty->index;
 392
 393   ifp = if_lookup_by_name (argv[0]);
 394   if (ifp == NULL)
 395     {
 396       vty_out (vty, "No such interface %s%s", argv[0], VNL);
 397       return CMD_SUCCESS;
 398     }
 399
 400   oi = (struct ospf6_interface *) ifp->info;
 401   if (oi == NULL)
 402     {
 403       vty_out (vty, "Interface %s not enabled%s", ifp->name, VNL);
 404       return CMD_SUCCESS;
 405     }
 406
 407   /* parse Area-ID */
 408   if (inet_pton (AF_INET, argv[1], &area_id) != 1)
 409     {
 410       vty_out (vty, "Invalid Area-ID: %s%s", argv[1], VNL);
 411       return CMD_SUCCESS;
 412     }
 413
 414   if (oi->area->area_id != area_id)
 415     {
 416       vty_out (vty, "Wrong Area-ID: %s is attached to area %s%s",
 417                oi->interface->name, oi->area->name, VNL);
 418       return CMD_SUCCESS;
 419     }
 420
 421   thread_execute (master, interface_down, oi, 0);
 422
 423   oa = oi->area;
 424   listnode_delete (oi->area->if_list, oi);
 425   oi->area = (struct ospf6_area *) NULL;
 426
 427   /* Withdraw inter-area routes from this area, if necessary */
 428   if (oa->if_list->count == 0)
 429     {
 430       UNSET_FLAG (oa->flag, OSPF6_AREA_ENABLE);
 431       ospf6_abr_disable_area (oa);
 432     }
 433
 434   return CMD_SUCCESS;
 435 }
 436
 437 void
 438 ospf6_show (struct vty *vty, struct ospf6 *o)
 439 {
 440   listnode n;
 441   struct ospf6_area *oa;
 442   char router_id[16], duration[32];
 443   struct timeval now, running;
 444
 445   /* process id, router id */
 446   inet_ntop (AF_INET, &o->router_id, router_id, sizeof (router_id));
 447   vty_out (vty, " OSPFv3 Routing Process (0) with Router-ID %s%s",
 448            router_id, VNL);
 449
 450   /* running time */
 451   gettimeofday (&now, (struct timezone *)NULL);
 452   timersub (&now, &o->starttime, &running);
 453   timerstring (&running, duration, sizeof (duration));
 454   vty_out (vty, " Running %s%s", duration, VNL);
 455
 456   /* Redistribute configuration */
 457   /* XXX */
 458
 459   /* LSAs */
 460   vty_out (vty, " Number of AS scoped LSAs is %u%s",
 461            o->lsdb->count, VNL);
 462
 463   /* Areas */
 464   vty_out (vty, " Number of areas in this router is %u%s",
 465            listcount (o->area_list), VNL);
 466   for (n = listhead (o->area_list); n; nextnode (n))
 467     {
 468       oa = (struct ospf6_area *) getdata (n);
 469       ospf6_area_show (vty, oa);
 470     }
 471 }
 472
 473 /* show top level structures */
 474 DEFUN (show_ipv6_ospf6,
 475        show_ipv6_ospf6_cmd,
 476        "show ipv6 ospf6",
 477        SHOW_STR
 478        IP6_STR
 479        OSPF6_STR)
 480 {
 481   OSPF6_CMD_CHECK_RUNNING ();
 482
 483   ospf6_show (vty, ospf6);
 484   return CMD_SUCCESS;
 485 }
 486
 487 DEFUN (show_ipv6_ospf6_route,
 488        show_ipv6_ospf6_route_cmd,
 489        "show ipv6 ospf6 route",
 490        SHOW_STR
 491        IP6_STR
 492        OSPF6_STR
 493        ROUTE_STR
 494        )
 495 {
 496   ospf6_route_table_show (vty, argc, argv, ospf6->route_table);
 497   return CMD_SUCCESS;
 498 }
 499
 500 ALIAS (show_ipv6_ospf6_route,
 501        show_ipv6_ospf6_route_detail_cmd,
 502        "show ipv6 ospf6 route (X:X::X:X|X:X::X:X/M|detail|summary)",
 503        SHOW_STR
 504        IP6_STR
 505        OSPF6_STR
 506        ROUTE_STR
 507        "Specify IPv6 address\n"
 508        "Specify IPv6 prefix\n"
 509        "Detailed information\n"
 510        "Summary of route table\n"
 511        );
 512
 513 DEFUN (show_ipv6_ospf6_route_match,
 514        show_ipv6_ospf6_route_match_cmd,
 515        "show ipv6 ospf6 route X:X::X:X/M match",
 516        SHOW_STR
 517        IP6_STR
 518        OSPF6_STR
 519        ROUTE_STR
 520        "Specify IPv6 prefix\n"
 521        "Display routes which match the specified route\n"
 522        )
 523 {
 524   char *sargv[CMD_ARGC_MAX];
 525   int i, sargc;
 526
 527   /* copy argv to sargv and then append "match" */
 528   for (i = 0; i < argc; i++)
 529     sargv[i] = argv[i];
 530   sargc = argc;
 531   sargv[sargc++] = "match";
 532   sargv[sargc] = NULL;
 533
 534   ospf6_route_table_show (vty, sargc, sargv, ospf6->route_table);
 535   return CMD_SUCCESS;
 536 }
 537
 538 DEFUN (show_ipv6_ospf6_route_match_detail,
 539        show_ipv6_ospf6_route_match_detail_cmd,
 540        "show ipv6 ospf6 route X:X::X:X/M match detail",
 541        SHOW_STR
 542        IP6_STR
 543        OSPF6_STR
 544        ROUTE_STR
 545        "Specify IPv6 prefix\n"
 546        "Display routes which match the specified route\n"
 547        "Detailed information\n"
 548        )
 549 {
 550   char *sargv[CMD_ARGC_MAX];
 551   int i, sargc;
 552
 553   /* copy argv to sargv and then append "match" and "detail" */
 554   for (i = 0; i < argc; i++)
 555     sargv[i] = argv[i];
 556   sargc = argc;
 557   sargv[sargc++] = "match";
 558   sargv[sargc++] = "detail";
 559   sargv[sargc] = NULL;
 560
 561   ospf6_route_table_show (vty, sargc, sargv, ospf6->route_table);
 562   return CMD_SUCCESS;
 563 }
 564
 565 ALIAS (show_ipv6_ospf6_route,
 566        show_ipv6_ospf6_route_type_cmd,
 567        "show ipv6 ospf6 route (intra-area|inter-area|external-1|external-2)",
 568        SHOW_STR
 569        IP6_STR
 570        OSPF6_STR
 571        ROUTE_STR
 572        "Dispaly Intra-Area routes\n"
 573        "Dispaly Inter-Area routes\n"
 574        "Dispaly Type-1 External routes\n"
 575        "Dispaly Type-2 External routes\n"
 576        );
 577
 578 DEFUN (show_ipv6_ospf6_route_type_detail,
 579        show_ipv6_ospf6_route_type_detail_cmd,
 580        "show ipv6 ospf6 route (intra-area|inter-area|external-1|external-2) detail",
 581        SHOW_STR
 582        IP6_STR
 583        OSPF6_STR
 584        ROUTE_STR
 585        "Dispaly Intra-Area routes\n"
 586        "Dispaly Inter-Area routes\n"
 587        "Dispaly Type-1 External routes\n"
 588        "Dispaly Type-2 External routes\n"
 589        "Detailed information\n"
 590        )
 591 {
 592   char *sargv[CMD_ARGC_MAX];
 593   int i, sargc;
 594
 595   /* copy argv to sargv and then append "detail" */
 596   for (i = 0; i < argc; i++)
 597     sargv[i] = argv[i];
 598   sargc = argc;
 599   sargv[sargc++] = "detail";
 600   sargv[sargc] = NULL;
 601
 602   ospf6_route_table_show (vty, sargc, sargv, ospf6->route_table);
 603   return CMD_SUCCESS;
 604 }
 605
 606 /* OSPF configuration write function. */
 607 int
 608 config_write_ospf6 (struct vty *vty)
 609 {
 610   char router_id[16];
 611   listnode j, k;
 612   struct ospf6_area *oa;
 613   struct ospf6_interface *oi;
 614
 615   /* OSPFv6 configuration. */
 616   if (ospf6 == NULL)
 617     return CMD_SUCCESS;
 618   if (CHECK_FLAG (ospf6->flag, OSPF6_DISABLED))
 619     return CMD_SUCCESS;
 620
 621   inet_ntop (AF_INET, &ospf6->router_id, router_id, sizeof (router_id));
 622   vty_out (vty, "router ospf6%s", VNL);
 623   vty_out (vty, " router-id %s%s", router_id, VNL);
 624
 625   ospf6_redistribute_config_write (vty);
 626   ospf6_area_config_write (vty);
 627
 628   for (j = listhead (ospf6->area_list); j; nextnode (j))
 629     {
 630       oa = (struct ospf6_area *) getdata (j);
 631       for (k = listhead (oa->if_list); k; nextnode (k))
 632         {
 633           oi = (struct ospf6_interface *) getdata (k);
 634           vty_out (vty, " interface %s area %s%s",
 635                    oi->interface->name, oa->name, VNL);
 636         }
 637     }
 638   vty_out (vty, "!%s", VNL);
 639   return 0;
 640 }
 641
 642 /* OSPF6 node structure. */
 643 struct cmd_node ospf6_node =
 644 {
 645   OSPF6_NODE,
 646   "%s(config-ospf6)# ",
 647   1 /* VTYSH */
 648 };
 649
 650 /* Install ospf related commands. */
 651 void
 652 ospf6_top_init ()
 653 {
 654   /* Install ospf6 top node. */
 655   install_node (&ospf6_node, config_write_ospf6);
 656
 657   install_element (VIEW_NODE, &show_ipv6_ospf6_cmd);
 658   install_element (ENABLE_NODE, &show_ipv6_ospf6_cmd);
 659   install_element (CONFIG_NODE, &router_ospf6_cmd);
 660
 661   install_element (VIEW_NODE, &show_ipv6_ospf6_route_cmd);
 662   install_element (VIEW_NODE, &show_ipv6_ospf6_route_detail_cmd);
 663   install_element (VIEW_NODE, &show_ipv6_ospf6_route_match_cmd);
 664   install_element (VIEW_NODE, &show_ipv6_ospf6_route_match_detail_cmd);
 665   install_element (VIEW_NODE, &show_ipv6_ospf6_route_type_cmd);
 666   install_element (VIEW_NODE, &show_ipv6_ospf6_route_type_detail_cmd);
 667   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_cmd);
 668   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_detail_cmd);
 669   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_match_cmd);
 670   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_match_detail_cmd);
 671   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_type_cmd);
 672   install_element (ENABLE_NODE, &show_ipv6_ospf6_route_type_detail_cmd);
 673
 674   install_default (OSPF6_NODE);
 675   install_element (OSPF6_NODE, &ospf6_router_id_cmd);
 676   install_element (OSPF6_NODE, &ospf6_interface_area_cmd);
 677   install_element (OSPF6_NODE, &no_ospf6_interface_area_cmd);
 678   install_element (OSPF6_NODE, &no_router_ospf6_cmd);
 679 }
 680
 681