rfc1246.ps

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(Experience with OSPF) 251.03 712 T
(July 1991) 493.02 712 T
72 69.05 540 81 R
7 X
V
0 X
([Moy]) 72 73 T
([Page 6]) 499.7 73 T
72 108 540 684 R
7 X
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0 X
(operational environment. Most of the remainder of the MIB\325) 72 676 T
(s variables parameterize the many ) 362.13 676 T
(features that OSPF provides the network administrator) 72 662 T
(. ) 333.17 662 T
(For more information on the MIB contact Fred Baker [fbaker].) 72 636 T
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72 702 540 720 R
7 X
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(RFC 1246) 72 712 T
(Experience with OSPF) 251.03 712 T
(July 1991) 493.02 712 T
72 69.05 540 81 R
7 X
V
0 X
([Moy]) 72 73 T
([Page 7]) 499.7 73 T
72 108 540 684 R
7 X
V
2 F
0 X
(4.0  Security ar) 72 673.33 T
(chitectur) 175.64 673.33 T
(e) 236.63 673.33 T
0 F
(In OSPF) 72 646 T
(, all protocol packet exchanges are authenticated. The OSPF packet header \050which is ) 112.69 646 T
-0.19 (common to all OSPF packets\051 contains a 16-bit Authentication type \336eld, and 64-bits of Authenti-) 72 632 P
(cation data. Each particular OSPF area must run a single authentication scheme, as indicated by ) 72 618 T
(the Authentication type \336eld. However) 72 604 T
(, authentication keys can be con\336gured by the system ) 258.39 604 T
(administrator on a per) 72 590 T
(-network basis.) 177.35 590 T
(When an OSPF packet is received from a network, the OSPF router \336rst veri\336es that it indicates ) 72 564 T
(the correct Authentication type. The router then authenticates the packet, running a veri\336cation ) 72 550 T
(algorithm using the con\336gured authentication key) 72 536 T
(, the 64-bits of Authentication data and the rest ) 310.07 536 T
(of the OSPF packet data as input. The precise algorithm used is dictated by the Authentication ) 72 522 T
(type. Packets failing the authentication algorithm are dropped, and the authentication failure is ) 72 508 T
(noted in a MIB-accessible variable \050see [3]\051.) 72 494 T
(There are currently few Authentication types in use. The current assignments are:) 72 468 T
72 432.01 540 440 C
72 437.98 540 437.98 2 L
0.5 H
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5 F
0 X
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(T) 72 443.33 T
(ABLE 2. Curr) 77.93 443.33 T
(ent OSPF Authentication types.) 139.1 443.33 T
(T) 144 421.34 T
(ype code) 149.93 421.34 T
(Algorithm) 225 421.34 T
1 F
(0) 144 404.34 T
(No authentication performed.) 225 404.34 T
(1) 144 388.34 T
(Simple \050clear\051 password.) 225 388.34 T
(2-255) 144 372.34 T
(Reserved for assignment by the IANA \[e-mail]\051) 225 372.34 T
(> 255) 144 356.34 T
(A) 225 356.34 T
(vailable for local \050per) 231.48 356.34 T
(-AS\051 de\336nition.) 317.59 356.34 T
0 F
(For more information on OSPF\325) 72 331.01 T
(s authentication procedures, see Sections 8.1, 8.2, and Appendix ) 225.92 331.01 T
(E of [2].) 72 317.01 T
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612 792 0 FMBEGINPAGE
72 702 540 720 R
7 X
0 K
V
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0 X
(RFC 1246) 72 712 T
(Experience with OSPF) 251.03 712 T
(July 1991) 493.02 712 T
72 69.05 540 81 R
7 X
V
0 X
([Moy]) 72 73 T
([Page 8]) 499.7 73 T
72 108 540 684 R
7 X
V
2 F
0 X
(5.0  Implementations) 72 673.33 T
0 F
-0.36 (The are multiple, interoperable implementations of OSPF currently available. This section gives a ) 72 646 P
(brief overview of the \336ve implementations that have participated in at least one round of interop-) 72 632 T
(erability testing) 72 618 T
1 F
(1) 146.96 622.8 T
0 F
(. Other implementations do exist, but because of commercial realities \050e.g., the ) 151.96 618 T
(product is not yet announced\051 they unfortunately cannot be listed here.) 72 604 T
-0.03 (The \336ve implementations that have participated in the OSPF interoperability testing are \050listed in ) 72 578 P
(alphabetical order\051:) 72 564 T
(\245) 72 544 T
6 F
(3com) 85.54 544 T
0 F
(. This implementation was wholly developed by 3com. It has participated in all three ) 112.85 544 T
(rounds of interoperability testing. It is also the only implementation of OSPF\325) 85.54 530 T
(s T) 458 530 T
(OS routing.. ) 472.78 530 T
(The 3com implementation consists of approximately 9000 lines of C code, including com-) 85.54 516 T
(ments but excluding user interface and MIB code. Consult Dino Farinacci [dino] for more ) 85.54 502 T
(details.) 85.54 488 T
(\245) 72 468 T
6 F
(ACC.) 85.54 468 T
0 F
( This implementation is based on the University of Maryland code. It participated in the ) 114.51 468 T
(last two rounds of interoperability testing. It also contains the only implementation of \050a pre-) 85.54 454 T
-0.04 (cursor to\051 the OSPF MIB \050see Section 3.0 for details\051, which it uses for monitoring and con\336g-) 85.54 440 P
-0.15 (uration. The ACC implementation consists of approximately 24,000 lines of C code, including ) 85.54 426 P
(its OSPF MIB code. Consult Fred Baker [fbaker] for more details.) 85.54 412 T
(\245) 72 392 T
6 F
-0.45 (Pr) 85.54 392 P
-0.45 (oteon) 97.97 392 P
0 F
-0.45 (. This implementation was wholly developed by Proteon. It has participated in all three ) 125.95 392 P
(rounds of interoperability testing. It is also the only implementation that has a signi\336cant ) 85.54 378 T
(amount of \336eld experience \050see Section 6.0 for details\051. The Proteon implementation consists ) 85.54 364 T
-0.14 (of approximately 9500 lines of C code, including comments but excluding user interface code. ) 85.54 350 P
(Consult John Moy [jmoy] for more details.) 85.54 336 T
(\245) 72 316 T
6 F
(W) 85.54 316 T
(ell\337eet) 96.87 316 T
0 F
(. This implementation has participated in all three rounds of interoperability testing. ) 130.18 316 T
(Consult Jonathan Hsu [jhsu] for more details.) 85.54 302 T
(\245) 72 282 T
6 F
(University of Maryland. ) 85.54 282 T
0 F
(This implementation was developed wholly by Rob Coltun at the ) 212.13 282 T
(University of Maryland. It has formed the basis for a number of commercial OSPF implemen-) 85.54 268 T
(tations, and also participated in the latest round of interoperability testing. The University of ) 85.54 254 T
(Maryland implementation consists of approximately 10,000 lines of C code. Consult Rob Col-) 85.54 240 T
(tun [rcoltun] for more details.) 85.54 226 T
-0.18 (Note that, as required by the IAB/IESG for Draft Standard status, there are multiple interoperable ) 72 200 P
(independent implementations, namely those from 3com, Proteon and the University of Maryland.) 72 186 T
72 122 540 142.09 C
72 129.99 203.98 129.99 2 L
0.25 H
2 Z
0 X
0 K
N
0 0 612 792 C
1 F
0 X
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(1.  For a detailed discussion of OSPF interoperability testing, see Section 7.0 of this report.) 72 115.33 T
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612 792 0 FMBEGINPAGE
72 702 540 720 R
7 X
0 K
V
0 F
0 X
(RFC 1246) 72 712 T
(Experience with OSPF) 251.03 712 T
(July 1991) 493.02 712 T
72 69.05 540 81 R
7 X
V
0 X
([Moy]) 72 73 T
([Page 9]) 499.7 73 T
72 108 540 684 R
7 X
V
2 F
0 X
(6.0  Operational experience) 72 673.33 T
0 F
-0.24 (This section discusses operational experience with the OSPF protocol. V) 72 646 P
-0.24 (ersion 1 of the OSPF pro-) 417.61 646 P
(tocol began to be deployed in the Internet in Spring of 1990. The results of this original deploy-) 72 632 T
(ment were reported to the mailing list ) 72 618 T
4 F
([e-mail]) 255.55 618 T
1 F
(2) 396.16 622.8 T
0 F
(. No protocol bugs were ) 401.15 618 T
(found in this \336rst deployment, although several additional features were found to be desirable. ) 72 604 T
(These new features were added to the protocol in OSPF V) 72 590 T
(ersion 2.) 349.79 590 T
-0.3 (The OSPF protocol is now deployed in a number of places in the Internet. In this section we focus ) 72 564 P
(on three highly visible systems, namely the NASA Sciences Internet, BARRNet and OARnet. ) 72 550 T
(The dimensions of these three OSPF systems is summarized in the following table:) 72 536 T
72 500.01 540 508 C
72 505.98 540 505.98 2 L
0.5 H
0 Z
0 X
0 K
N
0 0 612 792 C
5 F
0 X
0 K
(T) 72 511.33 T
(ABLE 3. Thr) 77.93 511.33 T
(ee operational OSPF deployments) 134.12 511.33 T
(Name) 72 489.34 T
(V) 144 489.34 T
(ersion 1 date) 150.3 489.34 T
(V) 252 489.34 T
(ersion 2 date) 258.3 489.34 T
(# r) 360 489.34 T
(outers) 371.75 489.34 T
(#externals) 432 489.34 T
1 F
(NSI) 72 472.34 T
(4/13/90) 144 472.34 T
(1/1/91) 252 472.34 T
(15) 360 472.34 T
(496) 432 472.34 T
(BARRNet) 72 456.34 T
(4/90) 144 456.34 T
(1) 252 456.34 T
(1/90) 256.63 456.34 T
(14) 360 456.34 T
(1816) 432 456.34 T
(OARnet) 72 440.34 T
(10/15/90) 144 440.34 T
(not yet) 252 440.34 T
(13) 360 440.34 T
(135-140) 432 440.34 T
0 F
(All the above deployments are using the Proteon OSPF implementation. There is one other ) 72 415.01 T
-0.38 (deployment worth mentioning in this context. 3com has started to deploy OSPF on their corporate ) 72 401.01 P
-0.36 (network. They have 8 of their routers running OSPF \050the 3com implementation\051, and are planning ) 72 387.01 P
(on cutting over the remaining routers \05020 in all\051. Currently they have two operational routers run-) 72 373.01 T
(ning OSPF and RIP simultaneously) 72 359.01 T
(. One converts OSPF data to RIP data, and the other RIP data ) 241.82 359.01 T
(to OSPF data. For more details, contact Dino Farinacci [dino].) 72 345.01 T
3 F
(6.1  NSI) 72 311.67 T
0 F
(The NASA Science Internet \050NSI\051 is a multiprotocol network, currently supporting both DECnet ) 72 285.01 T
(and TCP/IP protocols. NSI\325) 72 271.01 T
(s mission is to provide reliable high-speed communications to the ) 204.6 271.01 T
(NASA science community) 72 257.01 T
(. The NASA Science Internet connects with other national networks ) 199.8 257.01 T
-0.3 (including the National Science Foundation\325) 72 243.01 P
-0.3 (s NSFNET) 279.33 243.01 P
-0.3 (, the Department of Ener) 331.12 243.01 P
-0.3 (gy\325) 448.6 243.01 P
-0.3 (s ESnet and the ) 463.92 243.01 P
(Department of Defense\325) 72 229.01 T
(s MILNET) 187.23 229.01 T
(. NSI also has international connections to Japan, Australia, ) 239.31 229.01 T
(New Zealand, Chile and several European countries.) 72 215.01 T
(For more information on NSI, contact Jef) 72 189.01 T
(frey Bur) 270.65 189.01 T
(gan [jef) 310.73 189.01 T
(f] or Milo Medin [medin].) 347.48 189.01 T
72 122 540 142.09 C
72 129.99 203.98 129.99 2 L
0.25 H
2 Z
0 X
0 K
N
0 0 612 792 C
1 F
0 X
0 K
(2.  Archives of this mailing list are available from Ross V) 72 115.33 T
(each [rrv].) 301.85 115.33 T
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612 792 0 FMBEGINPAGE
72 702 540 720 R
7 X
0 K
V
0 F
0 X
(RFC 1246) 72 712 T
(Experience with OSPF) 251.03 712 T
(July 1991) 493.02 712 T
72 69.05 540 81 R
7 X
V
0 X
([Moy]) 72 73 T
([Page 10]) 493.7 73 T
72 108 540 684 R
7 X
V
6 F
0 X
(6.1.1  NSI\325) 72 264.02 T
(s OSPF system) 125.53 264.02 T
0 F
(NSI was one of the initial deployment sites for OSPF V) 72 238.02 T
(ersion 1, having deployed the protocol in ) 337.85 238.02 T
(April 1990. NSI has been running OSPF V2 since 1/1/91. They currently have 15 routers in their ) 72 224.02 T
(OSPF system. This system is pictured in Figure 1. It consists of a nationwide collection of serial ) 72 210.02 T
(lines, with ethernets at hub sites. The numbers associated to interfaces/links in Figure1 are the ) 72 196.02 T
-0.12 (associated OSPF costs. Note that certain links have been weighted so that they are less preferable ) 72 182.02 P
(than others.) 72 168.02 T
( Many of NSI\325) 72 142.02 T
(s OSPF routers are speaking either RIP and/or EGP as well as OSPF) 141.62 142.02 T
(. Routes from ) 469.13 142.02 T
(these other routing protocols are selectively imported into their OSPF system as externals. The ) 72 128.02 T
(current number of imported externals is 496.) 72 114.02 T
72 108 540 684 C
72 272.02 540 684 C
70.99 272.02 541.01 684 R
7 X
0 K
V
449.99 629 479.99 653 R
4 X
V
1 H
2 Z
0 X
N
119.99 565 155 589 R
N
427 660 427 622 2 L
4 H
N
430 594 430 498 2 L
N
173 610 174 458 2 L
N
377.99 632 410 656 R
1 H
N
119.99 527 156 551 R
N
191.99 573 226 597 R
N
119.99 453 155.99 480 R
3 X
V
0 X
N
119.99 492 157 516 R
N
380.99 573 413 597 R
N
452.99 546 485 570 R
N
452.99 510 485 534 R
N
380.99 525 413 549 R
N
384.98 426 416.99 450 R
N
434.99 426 467 450 R
N
308.99 408 341 432 R
N
218.99 435 251 459 R
N
330.98 555 362.99 579 R
N
428 642 450 642 2 L
N
381 587 226 587 2 L
N
409 644 425 644 2 L
N
414 584 430 584 2 L
N
453 559 430 559 2 L
N
453 523 430 523 2 L
N
413 538 429 538 2 L
N
363 575 381 575 2 L
N
396 632 397 597 2 L
N
398 525 398 450 2 L
N
418 438 435 438 2 L
N
341 420 385 436 2 L
N
252 449 381 537 2 L
N
252 441 309 416 2 L
N
208 572 236 459 2 L
N
174 586 192 585 2 L
N
156 576 172 576 2 L
N
156 540 172 540 2 L
N
157 503 174 503 2 L
N
156 466 174 466 2 L
N
374 354 408 378 R
4 X
V
0 X
N
310 355 344 379 R
N
326 408 326 379 2 L
N
306 336 418 336 2 L
4 H
N
325 354 325 336 2 L
1 H
N
392 354 393 337 2 L
N
1 F
(SURA) 382 641 T
(NSS9) 453 638 T
(GSFC2) 455 556 T
(GSFC4) 455 520 T
(GSFC1) 383 582 T
(GSFC3) 383 534 T
(MSFC) 387 435 T
(SSC) 441 436 T
(STScI) 335 565 T
(JSC) 317 419 T
(RICE) 315 364 T
(NSS1) 377 362 T