D-Link DGS-6600-48TS Configuration Guide - Page 283

Limitations, Behavior, time in IPv4 OSPF. However

Page 283 highlights

Volume 4-Layer 3 Configurations / Chapter 28-Open Shortest Path First Version 3 (OSPFv3) R2 Limitations DGS-6600:15#show ipv6 ospf neighbor OSPFv3 Process (null) Neighbor ID Pri State Dead Time Interface Instance ID 30.4.0.1 1 Full/BDR 0DT0H0M34S vlan4 0 Total Entries: 1DGS-6600:15#show ipv6 route IPv6 Routing Table Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, X - add to ACL table fail # - A number of slots are inactive O 3002::/64 [110/2] via fe80::40b:ff:fe27:4, vlan4, 0DT0H4M44S O 3003::/64 [110/2] via fe80::40b:ff:fe27:4, vlan4, 0DT0H4M44S C 3004::/64 is directly connected, vlan4 C 3005::/64 is directly connected, vlan5 C 3006::/64 is directly connected, vlan6 Total Entries: 5 entries, 5 routes Limitations OSPFv3 limitations include • The prefix length of the summary route for the host route would not exceed 64 because of the H/W limitation. Please use the command: ipv6 unicast-route long-prefix to support IPv6 routes with a prefix length that is longer than 64bits. • The unknown LSAs can't be counted in the current design. So the counter didn't work correctly. • The function of NSSA is not supported. Behavior Regarding router id selection, there is a difference between IPv4 OSPF and IPv6 OSPF. • IPv4 OSPF: If user configured router-id, it is possible to use the user's config, otherwise select the highest active ipv4 address from the ARP table as the router ID. • IPv6 OSPF: If the user configured router-id, use the user's config, otherwise select the highest active ipv4 address of user's configured VLAN IP interfaces as the router ID. • If all interfaces are down, we use 0.0.0.0 as router id. The process would shutdown at this time in IPv4 OSPF. However, we should remove all user's configured addresses to get 0.0.0.0 as router id in IPv6 OSPF. • If the router id is changed with the user's config, the new router id will execute after the process restarts. • IPv6 OSPF: If there were no configuration in any interface, the process would be down. • IPv4 OSPF: If no "network area" were configured, the process would be down. DGS-6600 Configuration Guide 283

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188
  • 189
  • 190
  • 191
  • 192
  • 193
  • 194
  • 195
  • 196
  • 197
  • 198
  • 199
  • 200
  • 201
  • 202
  • 203
  • 204
  • 205
  • 206
  • 207
  • 208
  • 209
  • 210
  • 211
  • 212
  • 213
  • 214
  • 215
  • 216
  • 217
  • 218
  • 219
  • 220
  • 221
  • 222
  • 223
  • 224
  • 225
  • 226
  • 227
  • 228
  • 229
  • 230
  • 231
  • 232
  • 233
  • 234
  • 235
  • 236
  • 237
  • 238
  • 239
  • 240
  • 241
  • 242
  • 243
  • 244
  • 245
  • 246
  • 247
  • 248
  • 249
  • 250
  • 251
  • 252
  • 253
  • 254
  • 255
  • 256
  • 257
  • 258
  • 259
  • 260
  • 261
  • 262
  • 263
  • 264
  • 265
  • 266
  • 267
  • 268
  • 269
  • 270
  • 271
  • 272
  • 273
  • 274
  • 275
  • 276
  • 277
  • 278
  • 279
  • 280
  • 281
  • 282
  • 283
  • 284
  • 285
  • 286
  • 287
  • 288
  • 289
  • 290
  • 291
  • 292
  • 293
  • 294
  • 295
  • 296
  • 297
  • 298
  • 299
  • 300
  • 301
  • 302
  • 303
  • 304
  • 305
  • 306
  • 307
  • 308
  • 309
  • 310
  • 311
  • 312
  • 313
  • 314
  • 315
  • 316
  • 317
  • 318
  • 319
  • 320
  • 321
  • 322
  • 323
  • 324
  • 325
  • 326
  • 327
  • 328
  • 329
  • 330
  • 331
  • 332
  • 333
  • 334
  • 335
  • 336
  • 337
  • 338
  • 339
  • 340
  • 341
  • 342
  • 343
  • 344
  • 345
  • 346
  • 347
  • 348
  • 349
  • 350
  • 351
  • 352
  • 353
  • 354
  • 355
  • 356
  • 357
  • 358
  • 359
  • 360
  • 361
  • 362
  • 363
  • 364
  • 365
  • 366
  • 367
  • 368
  • 369
  • 370
  • 371
  • 372
  • 373
  • 374
  • 375
  • 376
  • 377
  • 378
  • 379
  • 380
  • 381
  • 382
  • 383
  • 384
  • 385
  • 386
  • 387
  • 388
  • 389
  • 390
  • 391
  • 392
  • 393
  • 394
  • 395
  • 396
  • 397
  • 398
  • 399
  • 400
  • 401
  • 402
  • 403
  • 404
  • 405
  • 406
  • 407
  • 408
  • 409
  • 410
  • 411
  • 412
  • 413
  • 414
  • 415
  • 416
  • 417
  • 418
  • 419
  • 420
  • 421
  • 422
  • 423
  • 424
  • 425
  • 426
  • 427
  • 428
  • 429
  • 430
  • 431
  • 432
  • 433
  • 434
  • 435
  • 436
  • 437
  • 438
  • 439
  • 440
  • 441
  • 442
  • 443
  • 444
  • 445
  • 446
  • 447
  • 448
  • 449
  • 450
  • 451
  • 452
  • 453
  • 454
  • 455
  • 456
  • 457
  • 458
  • 459
  • 460
  • 461
  • 462
  • 463
  • 464
  • 465
  • 466
  • 467
  • 468
  • 469
  • 470
  • 471
  • 472
  • 473
  • 474
  • 475
  • 476
  • 477
  • 478
  • 479
  • 480
  • 481
  • 482
  • 483
  • 484
  • 485
  • 486
  • 487
  • 488
  • 489
  • 490
  • 491
  • 492
  • 493
  • 494
  • 495
  • 496
  • 497
  • 498
  • 499
  • 500
  • 501
  • 502
  • 503
  • 504
  • 505
  • 506
  • 507
  • 508
  • 509
  • 510
  • 511
  • 512
  • 513
  • 514
  • 515
  • 516
  • 517
  • 518
  • 519
  • 520
  • 521
  • 522
  • 523
  • 524
  • 525
  • 526
  • 527
  • 528
  • 529
  • 530
  • 531
  • 532
  • 533
  • 534
  • 535
  • 536
  • 537
  • 538
  • 539
  • 540
  • 541
  • 542
  • 543
  • 544
  • 545
  • 546
  • 547
  • 548
  • 549
  • 550
  • 551
  • 552
  • 553
  • 554
  • 555
  • 556
  • 557
  • 558
  • 559
  • 560
  • 561
  • 562
  • 563
  • 564
  • 565
  • 566
  • 567
  • 568
  • 569
  • 570
  • 571
  • 572
  • 573
  • 574
  • 575
  • 576
  • 577
  • 578
  • 579
  • 580
  • 581
  • 582
  • 583
  • 584
  • 585
  • 586
  • 587
  • 588
  • 589
  • 590
  • 591
  • 592
  • 593
  • 594
  • 595
  • 596
  • 597
  • 598
  • 599
  • 600
  • 601
  • 602
  • 603

Volume 4-Layer 3 Configurations / Chapter 28-Open Shortest Path First Version 3 (OSPFv3)
Limitations
DGS-6600 Configuration Guide
283
R2
Limitations
OSPFv3 limitations include
The prefix length of the summary route for the host route would not exceed 64 because of
the H/W limitation. Please use the command: ipv6 unicast-route long-prefix to support
IPv6 routes with a prefix length that is longer than 64bits.
The unknown LSAs can't be counted in the current design. So the counter didn't work cor-
rectly.
The function of NSSA is not supported.
Behavior
Regarding router id selection, there is a difference between IPv4 OSPF and IPv6 OSPF.
IPv4 OSPF: If user configured router-id, it is possible to use the user's config, otherwise
select the highest active ipv4 address from the ARP table as the router ID.
IPv6 OSPF: If the user configured router-id, use the user's config, otherwise select the
highest active ipv4 address of user's configured VLAN IP interfaces as the router ID.
If all interfaces are down, we use 0.0.0.0 as router id. The process would shutdown at this
time in IPv4 OSPF. However, we should remove all user's configured addresses to get
0.0.0.0 as router id in IPv6 OSPF.
If the router id is changed with the user's config, the new router id will execute after the
process restarts.
IPv6 OSPF: If there were no configuration in any interface, the process would be down.
IPv4 OSPF: If no “network area” were configured, the process would be down.
DGS-6600:15#show ipv6 ospf neighbor
OSPFv3 Process (null)
Neighbor ID
Pri
State
Dead Time
Interface
Instance ID
30.4.0.1
1
Full/BDR
0DT0H0M34S
vlan4
0
Total Entries: 1DGS-6600:15#show ipv6 route
IPv6 Routing Table
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
I - IS-IS, B - BGP, X - add to ACL table fail
# - A number of slots are inactive
O
3002::/64 [110/2] via fe80::40b:ff:fe27:4, vlan4, 0DT0H4M44S
O
3003::/64 [110/2] via fe80::40b:ff:fe27:4, vlan4, 0DT0H4M44S
C
3004::/64 is directly connected, vlan4
C
3005::/64 is directly connected, vlan5
C
3006::/64 is directly connected, vlan6
Total Entries: 5 entries, 5 routes