Segment Routingの利用例と未来

by Takeru Hayasaka

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4FHNFOU3PVUJOHͷ ར༻ྫͱະདྷ ૣࡔඩྲྀ !UBLFNJP*0 XBLBUF 1

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8IPBNJ w ͸΍͔͚ͨ͞Δ !UBLFNJP*0 w ωοτϫʔΫ΍ҙຯ࿦ JOGPTFD ʹڵຯ͕͋Δ w ͕஀ੜ೔Ͱඒຯ͍͓͠ञͷ ҿΈํΛֶͼʹདྷ·ͨ͠ w ࣮͸ωοτϫʔΫ͸ࠓ೥౓͔Β ΍ͬͯΔॳ৺ऀͳͷͰͪΐͬͱ ͨ͠αʔϕΠΛ࿩͠ʹདྷͨ !2

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໨త 4FHNFOU3PVUJOHΛ ͳΜͱͳ͘ ཧղͨ͠φ΢ͰϠϯάͳएखʹͳΔ !3

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ௐࠪ 4

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ௐࠪ! #(1΍041' *(1Λ ஌͍ͬͯΔ࢖͍ͬͯΔ

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ௐࠪ! ΞϯμʔϨΠ΍ΦʔόʔϨΠͱ ݴΘΕͯงғؾ͕Θ͔Δ

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ௐࠪ! 4FHNFOU3PVUJOHΛ஌͍ͬͯΔ

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ௐࠪ 4FHNFOU3PVUJOH Λʮ࢖ͬͯʯ͍Δ

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4FHNFOU3PVUJOHΛ Α͘͝ଘ஌ͷօ͞Μ͸ ෼΄ͲͷٳܜʹͳΓ·͢ !9

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͓඼ॻ͖ wഎܠࣄ৘ͱ4FHNFOU3PVUJOHͱ͸ wجૅ஌ࣝ wϢʔεέʔε wඪ४Խಈ޲ wະདྷͱͦͷઌ΁ !10

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എܠࣄ৘ͱ4FHNFOU3PVUJOHͱ͸ !11

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എܠ w ωοτϫʔΫࣄۀऀͷ๊͑ͯΔ໰୊ w ωοτϫʔΫͱτϥϑΟοΫύλʔϯ΋೥ʑෳࡶͰ ଟ༷ʹͳ͍ͬͯΔɻ w ऩӹΛߴΊΔʹ͸٬ʹྑ͍αʔϏεΛఏڙ͢Δඞཁ͕ ͋Γɺਫ਼౓ͷߴ͍τϥϑΟοΫ੍ޚ΁ͷχʔζ΋ߴ·ͬ ͍ͯΔɻ !12

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ڞ௨ͷ໰͍ !13

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ڞ௨ͷ໰͍ w2؅ཧίετΛ૿େͤͣ͞ʹଟ༷ͳαʔϏε Λఏڙ͢Δʹ͸ɺͲ͏͢Ε͹͍͍ͷ͔ɻ

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ڞ௨ͷ໰͍ w"ܦ࿏Λ໌ࣔతʹࢦఆ੍͠ޚ͢Δ wҰൠʹτϥϑΟοΫΤϯδχΞϦϯάͱΑ ͹ΕΔ w ʢ͔ͳΓڱٛͳදݱײ͸͋ΔͷͰ͋͘·ͰҰྫͰ͢ʣ

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τϥϑΟοΫ ΤϯδχΞϦϯά w௨ৗͷ*1ܦ࿏৘ใʹैͬͨܦ࿏બ୒Ͱ͸ɺجຊత ʹ࠷୹ܦ࿏͕બ୒͞ΕΔɻ w݁Ռɺಛఆܦ࿏ʹτϥϑΟοΫ͕ूத͠΍͘͢ͳΓɺ αʔϏεͷ಺༰ʹԠͨ͡ॊೈͳܦ࿏બ୒΋೉͠ ͍ɾɾɾ wଞʹ΋طଘͷϓϩτίϧʹ͸໰୊͕ɾɾɾ

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34715&ͷྫ w34715& wطଘͷ3471ʹϥϕϧ഑෍ͱ5&ʢ5SB⒏D &OHJOJFFSJOHʣͷػೳΛରԠ֦ͤͨ͞ுϓϩτί ϧ

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34715&ͷྫ wύέοτͷ௨աܦ࿏ͱͳΔτϯωϧΛ࡞੒͢ΔͨΊɺ ࣄલγάφϦϯά͕ൃੜ͢Δ w֤ϊʔυ͕ܦ࿏ʹؔ͢ΔεςʔτΛอ࣋͢Δ w݁Ռ؅ཧ͕ෳࡶʹͳΓɺεέʔϥϏϦςΟͷ੍ ໿΍໰୊ൃੜ࣌ͷରԠͷ೉͠͞ʹ௚݁͢Δ

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34715&ͷྫ wŨŽŘ w৽װઢ΋μΠΞௐ੔ͱ͍͏ਓྗγάφϦϯάΛͨ͠ ͔Βਏ͔ͬͨ wʢิ଍ɿXBLBUFͷॳ೔ʹ౦๺৽װઢ͕Ұ ࣌ؒࢭ·ͬͨͷͰࢀՃऀΈΜͳʹӨڹͨ͠ʣ

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ղܾࡦ !20

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!21

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4FHNFOU3PVUJOHͱ͸ w ωοτϫʔΫΛ4FHNFOUͱ͍͏ཁૉΛ༻͍ͯදݱ͠ɺ ͦͷ4FHNFOUΛࢦఆ͢Δ͜ͱʹΑΓύέοτͷసૹΛ ࣮ݱ͢ΔΞʔΩςΫνϟ w *&5'ͷ413*/( 4PVSDF1BDLFU3PVUJOHJO /FUXPSLJOH Ͱࡦఆ͞ΕͯΔ w ࣮͸஀ੜͯ͠प೥ͩͬͨΓ͢Δ !22

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ಛ௃ w εςʔτϨε w ػثෛՙɾӡ༻ෛՙܰݮ w *(1 041'*4*4 ͚ͩͰ࣮ݱ w ίϯτϩʔϧϓϨʔϯͷγϯϓϧԽ w σʔλϓϨʔϯඇґଘ w .1-4·ͨ͸*1W !23

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جૅ஌ࣝ !24

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4FHNFOUͷछྨ w /PEF4FHNFOU w ಛఆͷϊʔυΛද͢͜ͱ͕Ͱ͖Δ w QSFpY4*%ͱ͔ݴͬͨΓ΋͢Δ w "EKBDFODZ4FHNFOU w ϊʔυຖͷྡ઀ؔ܎Λࣔ͢ w ୠ͠ยํ޲ͣͭͷ࿩ w 4FHNFOU*%ʢ4*%ʣ w ͜ΕΒͷ4FHNFOUʹৼΒΕΔݻ ༗ͷ*% /PEF4FHNFOU /PEF4FHNFOU "EKBODFODZ 4FHNFOU SPVUFS SPVUFS 0 "EKBODFODZ 4FHNFOU !25

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4FHNFOUΛ ݩʹͨ͠େࡶ೺ͳύέοτసૹྫ 0 1 1 2 4FHNFOUʮ̎ʯ ύέοτσʔλ ύέοτͷྲྀΕ /PEF4FHNFOUʮ̎ʯ Λ΍ͬͯ·͢ !26

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/PEF4FHNFOU /PEF4*% ͷసૹಈ࡞ 1 4 1 3 0 2 4*%ʮʯ ύέοτσʔλ /PEF4*%ʮʯ !27

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/PEF4FHNFOU /PEF4*% ͷసૹಈ࡞ 1 4 1 3 0 2 4*%ʮʯ ύέοτσʔλ /PEF4*%ʮʯ *(1ͷTIPSUFTU QBUIʹ͕ͨͬͯ͠ύέοτ సૹΛߦ͏ !28

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/PEF4FHNFOU /PEF4*% ͷసૹಈ࡞ 1 4 1 3 0 2 ύέοτσʔλ /PEF4*%ʮʯ 4*%ʮʯ 4*%ʮʯ 4FHNFOU-JTU 4PVSDF3PVUJOHͷܦ࿏ʹ Ԋͬͯฒ΂ΒΕͨ4*%ͷϦετ ʢڍಈ͸·Μ·ɹελοΫ !29

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/PEF4FHNFOU /PEF4*% ͷసૹಈ࡞ 1 4 1 3 0 2 ύέοτσʔλ /PEF4*%ʮʯ 4*%ʮʯ 4FHNFOU-JTU !30

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/PEF4FHNFOU /PEF4*% ͷసૹಈ࡞ 1 4 1 3 0 2 ύέοτσʔλ /PEF4*%ʮʯ /POF 4FHNFOU-JTU !31

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/PEF4FHNFOUͷڍಈಛ௃ w ͳͥҠಈ͕εΩοϓͰ͖͔ͨ w /PEF4FHNFOU͸(MPCBMͳ4FHNFOUͰ͋Δ w ͭ·Γ/PEF4*%͸೚ҙͷ43EPNBJOʢͭ·Γ43 ͷྖҬʣ಺ͰϢχʔΫͳ஋ w/PEF4*%͕ଘࡏ͢Δύέοτ͸Ͳͷϧʔλ͕ड͚औͬ ͯ΋Ѽઌ͸ಉҰϊʔυʢϧʔλʣʹసૹ͞ΕΔ !32

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"EKBDFODZ4FHNFOU "EK4*% ͷసૹಈ࡞ 1 4 1 3 0 2 4*%ʮʯ ύέοτσʔλ "EK4*% \ ^ !33

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"EKBDFODZ4FHNFOU "EK4*% ͷసૹಈ࡞ 1 4 1 3 0 2 "EK4*% \ ^ 4*%ʮʯ 4FHNFOU-JTU ύέοτσʔλ !34

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"EKBDFODZ4FHNFOU "EK4*% ͷసૹಈ࡞ 1 4 1 3 0 2 "EK4*% \ ^ /POF 4FHNFOU-JTU ύέοτσʔλ !35

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"EKBDFODZ4FHNFOU ͷڍಈಛ௃ w "EKBDFODZ4FHNFOU͸-PDBM4FHNFOUͳͷͰҟͳ ΔϊʔυͰ͋Ε͹ಉ͡"EK4*%Λ࢖༻͢Δ͜ͱ͕Մೳ wٯʹ͍͑͹ಉ͡"EK4*%͕෇༩͞ΕͨύέοτͰ͋ͬͯ ΋ड͚औͬͨ࣌ͷѼઌ͸ϧʔλຖʹҟͳΔڍಈΛ͢Δ !36

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/PEFͱ"EKBDFODZΛ૊Έ߹ Θͤͨసૹಈ࡞ 1 4 1 3 0 2 "EK4*% 4*%ʮʯ 4FHNFOU-JTU ύέοτσʔλ 4*%ʮʯ 4*%ʮʯ !37

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/PEFͱ"EKBDFODZΛ૊Έ߹ Θͤͨసૹಈ࡞ 1 4 1 3 0 2 "EK4*% 4*%ʮʯ 4FHNFOU-JTU ύέοτσʔλ 4*%ʮʯ /PEF4*%΁సૹ !38

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/PEFͱ"EKBDFODZΛ૊Έ߹ Θͤͨసૹಈ࡞ 1 4 1 3 0 2 "EK4*% 4*%ʮʯ 4FHNFOU-JTU /PEF4*%΁సૹ !39

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/PEFͱ"EKBDFODZΛ૊Έ߹ Θͤͨసૹಈ࡞ 1 4 1 3 0 2 "EK4*% /POF 4FHNFOU-JTU "EK4*%Λ௨ΔΑ͏ ʹసૹ !40

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σʔλϓϨʔϯ w ࢖༻Ͱ͖ΔσʔλϓϨʔϯ͸.1-4ͱ*1Wͷͭɽ 4FHNFOU-JTUΛ͜ͷೋͭͰදݱ͢Δ͜ͱ͕Ͱ͖Δ w .1-4ϥϕϧελοΫͰදݱ͞ΕΔ w *1W*1W֦ுϔομͰදݱ͞ΕΔ w ࡉ͔͍ڍಈ͸͕࣌ؒͳͦ͞͏ͳͷͰੋඇޙͰฉ͍͍ͯ ͚ͨͩΕ͹ʂ !41

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جૅ஌ࣝͷ·ͱΊ w /PEF4FHNFOU w ಛఆͷϊʔυΛද͢͜ͱ͕Ͱ͖Δ w "EKBDFODZ4FHNFOU w ϊʔυຖͷྡ઀ؔ܎Λࣔ͢ʢୠ͠ยํ޲ͣͭͷ࿩ʣ w 4FHNFOU*%ʢ4*%ʣ w ͜ΕΒͷ4FHNFOUʹৼΒΕΔݻ༗ͷ*% w ͜ΕΒ͸શͯΛ૊Έ߹Θͤͯར༻͕Ͱ͖Δ !42

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Ϣʔεέʔε !43

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Ϣʔεέʔε w ಛ௃తʹܦ࿏Λࢦఆͨ͠Γ͢Δ΋ͷʹ࢖ΘΕΔ w αʔϏενΣΠχϯά w ৑௕ߏ੒ w /7' w ΞϓϦέʔγϣϯ͝ͱʹ੍ޚ͞ΕͨϧʔςΟϯά w ྫ͑͹TJNͷFOBCMFʹ͢Δ͔ͳͲͷ"1*ͱ͔ w ͳͲɾɾɾ !44

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αʔϏενΣΠχϯά 1 4 1 3 0 2 w 43Λ࢖ͬͯ'8΍%1*ͳͲͷαʔϏεϊʔυΛ௨ΔΑ͏ ʹઃఆ͢Δ͜ͱ͕Մೳ firewallɿ10 !45

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%$ͷ৑௕ߏ੒ IUUQTXXXTMJEFTIBSFOFUMJOFDPSQTT !46

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ඪ४Խಈ޲ !47

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ඪ४Խಈ޲ w *&5'ͷ413*/( 4PVSDF 1BDLFU3PVUJOHJO /FUXPSLJOH Ͱࡦఆ͞ΕͯΔ w ΞΫςΟϒͳυϥϑτ͕΋ ͋Γ௒׆ൃ w ͜ͷத͔ΒҰͭϐοΫΞοϓ͠ ͯݟ·͢ɽ !48

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ඪ४Խಈ޲ w ͪͳΈʹͲΕ͘Β͍׆ൃͳͷ͔ͷ΄͔ͱαΠζΛൺֱ IUUQͰ߹ܭIJU 5-4ͰIJU !49

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ඪ४Խಈ޲ 43WͰ͸೔ຊਓ͕ٞ࿦ʹࢀՃͯ͠ ΠχγΞνϒΛ࣋ͬͯΔʂ w ͳͷͰ43Wʹ͍ͭͯͷඪ४Խಈ޲ʹ͍ͭͯ΄ Μͷͪΐͬͱ͚ͩগ͠ϐοΫΞοϓ͠·͢ !50

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ඪ४Խಈ޲ w ࡢ೥ͷESBGUpMTpMTTQSJOHTSWOFUXPSLQSPHSBNNJOH w ʮ֦ுϔολʔʹ͸సૹઌͷࢦఆʢ-PDBUPSʣ͚ͩͰͳ͘ύέοτΛड͚ औͬͨ࣌ͷ"DUJPOʢ'VODUJPOʣ΋߹Θͤͯࢦఆ͢Δ͜ͱ͕૝ఆ͍ͯ͠Δʯ w ֦ுϔολʔʹॻ͖ࠐΊΔ4*%௕͕Ϗοτ΋͋Δ -PDBUPSʢసૹઌʣ "SHVNFOU "DUJPOʹର͢Δύϥϝʔλ 'VODUJPO "DUJPO CJU ͪͳΈશͯՄม௕ͷ߲໨ !51

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ඪ४Խಈ޲ w ࠓ೥ͷESBGUpMTpMTTQSJOH TSWOFUXPSL QSPHSBNNJOHͰ͸ w ͍ͭʹެࣜͰ࣮ݧ࣮૷͕ੜ͑ͨ w IUUQTHJUIVCDPN FCJLFOQTSW w Θ͔ͣҰ೥଍ΒͣͰ͍͢͝ ◦T.Insert ◦T.Encaps, T.Encaps.Red ◦End, End.DT6 ◦End.MAP (future) ◦End.M.GTP6.D ◦End.M.GTP6.E ◦End.M.GTP4.E (future) ◦T.M.Tmap (future) ◦End.Limit (not planned) !52

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ඪ४Խಈ޲ w ݸਓతʹ໘ന͔ͬͨͷ͸ϕϯμʔ֤͕ࣾͲ͏͍͏ํ޲ʹ޲͖ ͍ͨͷ͕ผ్ͷࢿྉΛ୳͢ͱ஍ຯʹಁ͚ͯΘ͔Δͱ͍͏͜ͱɽ IUUQTXXXOJDBEKQKBNBUFSJBMTJFUGSFQPSUNBUTVTIJNBQEG !53

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ඪ४Խಈ޲ IUUQTXXXOJDBEKQKBNBUFSJBMTJFUGSFQPSUNBUTVTIJNBQEG !54

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ඪ४Խಈ޲·ͱΊ w 43W͸࣮͸ʹඪ४Խ͕ग़ͨ͹͔Γͷ৽͍͠΍ͭ w Ͳ͜ͷϕϯμʔ΋ڵຯ௡ʑͱ͍͏͜ͱ͕Θ͔Γɼ͜ΕΒ͸͔ ͳΓਐาͯ͠Δʂ w ฒʑͳΒ͵౒ྗΛײ͡ΔͷͰͥͻ৭ʑݟͯཉ͍͠ !55

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ະདྷͱͦͷઌ΁ !56

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ࠓͷ43๊͕͑Δ࿩ w 4*%ͷ؅ཧϓϥΫςΟε΍ϓϩϏδϣχϯά͕ඞཁ w ηάϝϯτϧʔςΟϯάͷ֊૚Խ w ͲΜͳ5&ϙϦγʔʹ͢Ε͹͍͍ͷ͔ w ϥϕϧελοΫ਺ͷ૿ՃͰͷݶք஋ w ύοͱࢥ͍͍ͭͨͷͰ΋͜Μͳײ͡Ͱ·ͩ·ͩࣽ٧Ί Δඞཁ͕͋Γͦ͏ !57

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4*%ͷ؅ཧϓϥΫςΟε΍ ϓϩϏδϣχϯά͕ඞཁ w /PEF4*%͸4FHNFOUEPNBJOͰ(MPCBMͳ஋Ͱ͋Δඞཁ͕͋Δ w ͭ·ΓඃΒͤͯ͸͍͚ͳ͍ɽ w ඃͬͯ͠·ͬͨϊʔυͷͲͪΒΛ༗ޮʹ͠Α͏͔ͱ͍͏نఆ͸΋ͪ ΖΜଘࡏ͸͢Δ w DGESBGUJFUGTQSJOHDPOqJDUSFTPMVUJPO w ίϯϑΟάͰԿ୆΋ઃఆ͢ΔJOEFYͷ஋ͳΜͯͨͩͷ੔਺஋ͳͷͰͱͯ ΋ਏ͍ɾɾɾ w ϓϩϏδϣχϯάπʔϧ΍ՄࢹԽ౳ͷϓϥΫςΟε͕ඞཁ !58

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ηάϝϯτϧʔςΟϯά ͷ֊૚Խ w ֤ϊʔυ͕43EPNBJO಺ͷશ4*%৘ใΛอ࣋͢Δඞཁ ੑ͕ଘࡏ͢Δͭ·ΓωοτϫʔΫن໛֦େʹ൐͏৘ใ ྔͷ૿ՃͰࢮ͵ w ղܾࡦɿ֊૚ԽΛߦ͏ w ֤ϊʔυʹ্Ґηάϝϯτ಺ͷ৘ใͷΈΛ࣋ͨͤɼ ଞͷ্Ґηάϝϯτ಺ͷϊʔυΛӅṭ w ֤ϊʔυͷ࣋ͭ৘ใྔ࡟ݮΛ࣮ݱ !59

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ηάϝϯτϧʔςΟϯά ͷ֊૚Խ w ͜ͷղܾࡦʹ͸໰୊͕͋Δ w ϙϦγઃఆൣғͷ໌֬Խ͸ԿͰ͢Ε͹ྑ͍ΜͩΖ͏ w ্Ґηάϝϯτ΁ͷ4*%෇༩ͷ༗ແʹΑΔ෼ྨʁ w 431$&΁ͷϙϦγઃఆख๏ʹΑΔ෼ྨʁ w ͦ΋ͦ΋ந৅Խͨ͠֊૚Խͨ͠΍ͭ͸11ΑΖ͘͠ͳײ͡Ͱ࣍ ਺௚ܘ໰୊తͷ͕ͦͷ͏ͪى͖ΔͷͰ͸ɾɾɾʁ w ࠷େ࣍਺ͱ௚ܘͷ੍໿ͷ΋ͱͰͲΕ͚ͩ௖఺Λଟؚ͘Μͩ άϥϑΛ࡞ΕΔ w DG௚ܘ͕খ͍͞஗ԆΛখ͘͞Ͱ͖Δ !60

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·ͱΊ w 43͸ΊͬͪΌศརɽؒҧ͍ͳ࣍͘ੈ୅ͷύϥμΠϜʹ ͳΔʢͱࢲ͸ࢥͬͯΔʣ w ͔͠͠ΦϖϨʔγϣϯͷ؍఺͔ΒͲ͏͢Ε͹ྑ͍Μͩ Ζ͏ͳͱ͍͏ͷ͕ΰϩΰϩ͋Γ·ͩ·ͩࣽ٧ΊΔ΂͖ ੈք؍ɽ w ͔ͳΓ༻ޠΛͰ͖Δ͚ͩল͍ͨͷͰॏശͷ۱Λͭͭ͘ ͱϘϩ͕ग़ΔͷͰʢ༏͘͠ʣٙ໰఺͸ฉ͍͍ͯͩ͘͞ !61

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