One document matched: draft-ietf-idmr-dvmrp-v3-as-00.ps

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(INTERNET DRAFT)72 96 Q(Juniper Netw)315.998 E(orks)-.1 E
(draft-ietf-idmr)72 108 Q 303.888(-dvmrp-v3-as-01 July)-.2 F(2000)2.5 E
(Expires: January 26, 2001)438.448 120 Q/F1 12/Times-Bold@0 SF
(Distance V)133.986 180.6 Q(ector Multicast Routing Pr)-1.2 E(otocol A)
-.216 E(pplicability Statement)-.3 E/F2 10/Times-Bold@0 SF
(Status of this Memo)72 234.6 Q F0(This document is an Internet-Draft a\
nd is in full conformance with all pro)97 262.2 Q
(visions of Section 10 of RFC2026.)-.15 E(Internet-Drafts are w)97 286.2
Q(orking documents of the Internet Engineering T)-.1 E(ask F)-.8 E
(orce \(IETF\), its areas, and its)-.15 E -.1(wo)97 298.2 S
(rking groups.).1 E(Note that other groups may also distrib)5 E(ute w)
-.2 E(orking documents as Internet-Drafts.)-.1 E
(Internet-Drafts are draft documents v)97 322.2 Q
(alid for a maximum of six months and may be updated, replaced, or)-.25
E(obsoleted by other documents at an)97 334.2 Q 2.5(yt)-.15 G 2.5
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(is inappropriate to use Internet- Drafts as reference material or to)
2.5 E(cite them other than as "w)97 346.2 Q(ork in progress.")-.1 E
(The list of current Internet-Drafts can be accessed at http://www)97
370.2 Q(.ietf.or)-.65 E(g/ietf/1id-abstracts.txt)-.18 E
(The list of Internet-Draft Shado)97 394.2 Q 2.5(wD)-.25 G
(irectories can be accessed at http://www)-2.5 E(.ietf.or)-.65 E
(g/shado)-.18 E -.65(w.)-.25 G(html.).65 E F2(Abstract)72 430.2 Q F0
(This document pro)97 457.8 Q(vides a frame)-.15 E -.1(wo)-.25 G
(rk for the use of Distance V).1 E(ector Multicast Routing Protocol \(D)
-1.11 E(VMRP\))-.4 E -1.11(Ve)97 469.8 S
(rsion 3 within a multicast routing domain. It is an interior g)1.11 E
(ate)-.05 E -.1(wa)-.25 G 2.5(yp).1 G
(rotocol designed to be used within an)-2.5 E(autonomous system.)97
481.8 Q 402.71(Pusateri [P)72 696 R(age 1])-.15 E EP
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SF 2.5(1. Intended)72 84 R(use)2.5 E F0 -.4(DV)97 108 S(MRP [Pusa99] ca\
n be characterized as a broadcast and prune multicast routing protocol.\
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(anted data traf)-.1 E(\214c is pruned back to the)-.25 E
(minimum tree necessary to reach all of the current recei)97 132 Q -.15
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-.25 G 2.5(nm).15 G
(echanism for all last hop routers to learn about all acti)-2.5 E .3
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(messages back up the multicast deli)97 216 Q -.15(ve)-.25 G(ry tree to)
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.1 E(The prunes sent upstream to)97 240 Q -.1(wa)-.25 G(rd the source t\
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(The periodic broadcast and prune nature of the protocol mak)5 E
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276 Q -.4(DV)97 300 S(MRP').4 E 2.5(sa)-.55 G(dv)-2.5 E
(antages compared with other multicast routing protocols include:)-.25 E
15.56(a. Pure)97 315.6 R(source speci\214c multicast distrib)2.5 E
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(uilds a broadcast tree per source netw)-.2 E
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(links that are not part of the broadcast tree for a source.)122 358.8 Q
15(d. D)97 374.4 R(VMRP uses its o)-.4 E(wn topology disco)-.25 E -.15
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(rs.).15 E(Additionally)97 477.6 Q 2.5(,D)-.65 G(VMRP operates on the p\
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(unw)97 489.6 Q(anted data will be pruned back to)-.1 E -.1(wa)-.25 G
(rd the source. If a D).1 E(VMRP domain is connected do)-.4 E
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513.6 S(MRP domain from the e).4 E(xplicit join domain. F)-.15 E
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525.6 Q -.15(ve)-.4 G(nted to inform border routers between e).15 E
(xplicit join domains and broadcast and prune domains about the)-.15 E
(acti)97 537.6 Q .3 -.15(ve g)-.25 H
(roup membership within the broadcast and prune domain.).15 E F1 2.5
(2. Scalability/A)72 573.6 R(pplicability)-.25 E F0 2.5(Ar)97 597.6 S
(outing protocol need only scale within the limits of its intended use.)
-2.5 E(In this case, D)5 E(VMRP need only scale)-.4 E(within the conte)
97 609.6 Q(xt of multicast routing domain or autonomous system.)-.15 E
(There are se)97 633.6 Q -.15(ve)-.25 G(ral f).15 E
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(actors are well understood)-.1 E(and by making these e)97 645.6 Q(xpli\
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(VMRP Applicability Statement)-.4 E(July 2000)129.8 E(Con)97 84 Q -.15
(ve)-.4 G -.18(rg).15 G(ence time).18 E(Since D)122 96 Q
(VMRP uses a distance v)-.4 E(ector \(also called Bellman-F)-.15 E
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(ute source information, its scope is limited by the con)-.2 E -.15(ve)
-.4 G -.18(rg).15 G(ence time required to propag).18 E(ate updated)-.05
E(source information across the routing domain. In order to limit the c\
on)122 120 Q -.15(ve)-.4 G -.18(rg).15 G(ence time, D).18 E(VMRP has)-.4
E(imposed a limit on the number of hops across a domain by setting the \
in\214nity metric to 32 hops.)122 132 Q(Count to In\214nity)97 147.6 Q
(All distance v)122 159.6 Q
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(wn "count to in\214nity" problem [Perl92].)-.25 E(Ho)122 171.6 Q(we)
-.25 E -.15(ve)-.25 G .8 -.4(r, b).15 H 2.5(yr).4 G
(equiring the use of split horizon with poison re)-2.5 E -.15(ve)-.25 G
(rse, the chances of encountering this are).15 E(signi\214cantly lo)122
183.6 Q(wered.)-.25 E/F1 10/Times-Bold@0 SF 2.5(3. State)72 219.6 R
(Analysis)2.5 E F0(As stated earlier)97 243.6 Q 2.5(,D)-.4 G
(VMRP broadcasts ne)-2.9 E 2.5(wm)-.25 G(ulticast data to all recei)-2.5
E -.15(ve)-.25 G(rs and then prunes back the unw).15 E(anted)-.1 E
(data based on group membership information. T)97 255.6 Q 2.5(of)-.8 G
(urther reduce the amount of broadcasted data, D)-2.5 E(VMRP)-.4 E -.2
(bu)97 267.6 S(ilds the broadcast tree by determining the single re).2 E
-.15(ve)-.25 G(rse path from a recei).15 E -.15(ve)-.25 G 2.5(rb).15 G
(ack to the source and pruning)-2.5 E(duplicate paths.)97 279.6 Q
(This truncated broadcast tree is precalculated using poison re)97 303.6
Q -.15(ve)-.25 G(rse route updates as each router participates in a).15
E(designated forw)97 315.6 Q(arder election per source netw)-.1 E
(ork to determine the upstream router)-.1 E(.)-.55 E(This mechanism pre)
97 339.6 Q -.15(ve)-.25 G(nts duplicate datagrams from arri).15 E
(ving on multi-access netw)-.25 E(orks at the e)-.1 E(xpense of more)
-.15 E(state in the router)97 351.6 Q 2.5(.D)-.55 G
(VMRP requires designated forw)-2.9 E(arder election state to be k)-.1 E
(ept per pre\214x per interf)-.1 E(ace and)-.1 E(prune state to be k)97
363.6 Q(ept per neighbor per \(group, source pre\214x\) pair)-.1 E(.)
-.55 E F1 2.5(4. Contr)72 399.6 R(ol T)-.18 E(raf\214c Analysis)-.74 E
F0(Independent of the amount of multicast data being forw)97 423.6 Q
(arded, D)-.1 E(VMRP will al)-.4 E -.1(wa)-.1 G
(ys send some control traf).1 E(\214c.)-.25 E(First, there is a D)97
435.6 Q(VMRP probe message sent e)-.4 E -.15(ve)-.25 G
(ry 10 seconds per interf).15 E(ace for neighbor disco)-.1 E -.15(ve)
-.15 G(ry and k).15 E(eep-)-.1 E(ali)97 447.6 Q .3 -.15(ve f)-.25 H
(unctions. Additionally).15 E 2.5(,t)-.65 G(here are periodic route e)
-2.5 E(xchanges that adv)-.15 E(ertise source netw)-.15 E
(orks and assist in)-.1 E -.2(bu)97 459.6 S(ilding the multicast deli).2
E -.15(ve)-.25 G(ry trees. These route reports are resent e).15 E -.15
(ve)-.25 G(ry 60 seconds b).15 E(ut are spread out across)-.2 E
(the report interv)97 471.6 Q(al to reduce the processing load.)-.25 E
(The number of route report pack)5 E(ets sent is dependent on the)-.1 E
(number of pre\214x)97 483.6 Q(es being reported.)-.15 E(The amount of \
prune and graft messages sent is a function of the number of acti)97
507.6 Q .3 -.15(ve s)-.25 H(enders and recei).15 E -.15(ve)-.25 G
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ed multicast data. The lifetime of a prune which is speci\214c to a gro\
up and source netw)-.1 E(ork is)-.1 E(approximately 2 hours. This long \
lifetime greatly limits the amount of prune control traf)97 543.6 Q
(\214c that is sent.)-.25 E 402.71(Pusateri [P)72 696 R(age 3])-.15 E EP
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/F0 10/Times-Roman@0 SF(INTERNET)72 48 Q 82.4(-DRAFT D)-.92 F
(VMRP Applicability Statement)-.4 E(July 2000)129.8 E/F1 10/Times-Bold@0
SF 2.5(5. Refer)72 84 R(ences)-.18 E F0 10.84([Fenn00] Fenner)97 115.2 R
2.5(,W)-.4 G(., "Domain W)-3.42 E
(ide Multicast Group Membership Reports", W)-.4 E
(ork in Progress, July 2000.)-.8 E 14.73([Perl92] Perlman,)97 130.8 R
(R., "Interconnections: Bridges and Routers", Addison-W)2.5 E(esle)-.8 E
1.3 -.65(y, 1)-.15 H(992, pp. 210-211.).65 E 11.95([Pusa99] Pusateri,)97
146.4 R -.74(T.)2.5 G 2.5(,").74 G(Distance-V)-2.5 E
(ector Multicast Routing Protocol V)-1.11 E(ersion 3",)-1.11 E -.8(Wo)5
G(rk In Progress,).8 E(September 1999.)147 158.4 Q F1 2.5(6. A)72 194.4
R(uthor')-.5 E 2.5(sA)-.37 G(ddr)-2.5 E(ess)-.18 E F0(Thomas Pusateri)97
222 Q(Juniper Netw)97 234 Q(orks, Inc.)-.1 E(1194 North Mathilda A)97
246 Q -.15(ve)-.74 G(nue).15 E(Sunn)97 258 Q(yv)-.15 E
(ale, CA 94089 USA)-.25 E(Phone: \(408\) 734-7690)97 270 Q
(EMail: pusateri@juniper)97 282 Q(.net)-.55 E F1 2.5(7. Ackno)72 318 R
(wledgments)-.1 E F0(The author w)97 345.6 Q(ould lik)-.1 E 2.5(et)-.1 G
2.5(oa)-2.5 G(ckno)-2.5 E(wledge Da)-.25 E .3 -.15(ve T)-.2 H(haler).15
E 2.5(,B)-.4 G(ill Fenner)-2.5 E 2.5(,T)-.4 G(homas Maufer)-2.5 E 2.5
(,a)-.4 G(nd Ra)-2.5 E(vi Shekhar for their)-.2 E(re)97 357.6 Q(vie)-.25
E 2.5(wa)-.25 G(nd comments.)-2.5 E 402.71(Pusateri [P)72 696 R(age 4])
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SF 2.5(8. Full)72 84 R(Copyright Statement)2.5 E F0(Cop)97 111.6 Q
(yright \(C\) The Internet Society 1999. All Rights Reserv)-.1 E(ed.)
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r assist in its implementation may be prepared, copied, published and d\
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(whole or in part, without restriction of an)97 159.6 Q 2.5(yk)-.15 G
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