rfc1584.ps

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%%EndProlog
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(Network Working Group) 72 713.33 T
(J. Moy) 512.22 713.33 T
(Request for Comments: 1584) 72 701.33 T
(Proteon, Inc.) 488.62 701.33 T
(Category: Standards Track) 72 689.33 T
(March 1994) 491.4 689.33 T
72 72 540 83.95 R
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V
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(Moy) 72 77.28 T
([Page 1]) 506.4 77.28 T
72 117 540 648 R
7 X
V
1 16 Q
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(Multicast Extensions to OSPF) 203.55 637.33 T
1 14 Q
(Status of this Memo) 72 558.67 T
0 10 Q
-0.06 (This document speci\336es an Internet standards track protocol for the Internet community) 72 533.33 P
-0.06 (, and requests discussion and) 421.99 533.33 P
(suggestions for improvements. Please refer to the current edition of the \322Internet Of) 72 521.33 T
(\336cial Protocol Standards\323 \050STD) 407.03 521.33 T
(1\051 for the standardization state and status of this protocol. Distribution of this memo is unlimited.) 72 509.33 T
1 14 Q
(Abstract) 72 470.67 T
0 10 Q
(This memo documents enhancements to the OSPF protocol enabling the routing of IP multicast datagrams. In this) 72 445.33 T
(proposal, an IP multicast packet is routed based both on the packet\325) 72 433.33 T
(s source and its multicast destination \050commonly) 341.41 433.33 T
-0.35 (referred to as source/destination routing\051. As it is routed, the multicast packet follows a shortest path to each multicast) 72 421.33 P
-0.26 (destination. During packet forwarding, any commonality of paths is exploited; when multiple hosts belong to a single) 72 409.33 P
(multicast group, a multicast packet will be replicated only when the paths to the separate hosts diver) 72 397.33 T
(ge.) 472.6 397.33 T
-0.26 (OSPF) 72 373.33 P
-0.26 (, a link-state routing protocol, provides a database describing the Autonomous System\325) 95.1 373.33 P
-0.26 (s topology) 439.72 373.33 P
-0.26 (. A new OSPF) 480.76 373.33 P
(link state advertisement is added describing the location of multicast destinations. A multicast packet\325) 72 361.33 T
(s path is then) 479.19 361.33 T
(calculated by building a pruned shortest-path tree rooted at the packet\325) 72 349.33 T
(s IP source. These trees are built on demand,) 353.61 349.33 T
(and the results of the calculation are cached for use by subsequent packets.) 72 337.33 T
(The multicast extensions are built on top of OSPF V) 72 313.33 T
(ersion 2. The extensions have been implemented so that a) 280.61 313.33 T
-0.09 (multicast routing capability can be introduced piecemeal into an OSPF V) 72 301.33 P
-0.09 (ersion 2 routing domain. Some of the OSPF) 362.7 301.33 P
(V) 72 289.33 T
(ersion 2 routers may run the multicast extensions, while others may continue to be restricted to the forwarding of) 78.11 289.33 T
(regular IP traf) 72 277.33 T
(\336c \050unicasts\051.) 127.91 277.33 T
(Please send comments to [e-mail].) 72 253.33 T
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(RFC 1584) 72 713.33 T
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(Multicast Extensions to OSPF) 245.57 713.33 T
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(March 1994) 491.4 713.33 T
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(Moy) 72 74.33 T
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(1) 72 676 T
(Introduction) 108 676 T
(..............................................................................................................) 168 676 T
(5) 498 676 T
0 10 Q
(1.1) 108 661.33 T
(T) 144 661.33 T
(erminology) 149.41 661.33 T
(........................................................................................................................) 197.5 661.33 T
(5) 499 661.33 T
(1.2) 108 647.33 T
(Acknowledgments) 144 647.33 T
(...............................................................................................................) 220 647.33 T
(6) 499 647.33 T
0 12 Q
(2) 72 628 T
(Multicast routing in MOSPF) 108 628 T
(....................................................................................) 246 628 T
(6) 498 628 T
0 10 Q
(2.1) 108 613.33 T
(Routing characteristics) 144 613.33 T
(........................................................................................................) 237.5 613.33 T
(7) 499 613.33 T
(2.2) 108 599.33 T
(Sample path of a multicast datagram) 144 599.33 T
(..................................................................................) 292.5 599.33 T
(7) 499 599.33 T
(2.3) 108 585.33 T
(MOSPF forwarding mechanism) 144 585.33 T
(..........................................................................................) 272.5 585.33 T
(9) 499 585.33 T
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(2.3.1) 144 573.33 T
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(IGMP interface: the local group database) 180 573.33 T
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