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Segment Routingの利用例と未来

Segment Routingの利用例と未来

#wakate2018で話したSegment Routingについての紹介スライド
公開版なので自己紹介とちょっとした補足が増えてます(がほとんど本編に変わりはありません)

Takeru Hayasaka

October 08, 2018
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  1. 4FHNFOU3PVUJOHͷ
    ར༻ྫͱະདྷ
    ૣࡔඩྲྀ !UBLFNJP*0
    XBLBUF
    1

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  2. 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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  3. ໨త
    4FHNFOU3PVUJOHΛ ͳΜͱͳ͘

    ཧղͨ͠φ΢ͰϠϯάͳएखʹͳΔ
    !3

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  4. ௐࠪ!
    #(1΍041' *(1Λ
    ஌͍ͬͯΔ࢖͍ͬͯΔ

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  5. ௐࠪ!
    ΞϯμʔϨΠ΍ΦʔόʔϨΠͱ
    ݴΘΕͯงғؾ͕Θ͔Δ

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  6. ௐࠪ!
    4FHNFOU3PVUJOHΛ஌͍ͬͯΔ

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  7. ௐࠪ
    4FHNFOU3PVUJOH
    Λʮ࢖ͬͯʯ͍Δ

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  8. 4FHNFOU3PVUJOHΛ
    Α͘͝ଘ஌ͷօ͞Μ͸
    ෼΄ͲͷٳܜʹͳΓ·͢
    !9

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

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  10. എܠࣄ৘ͱ4FHNFOU3PVUJOHͱ͸
    !11

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

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  12. ڞ௨ͷ໰͍
    !13

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  13. ڞ௨ͷ໰͍
    w2؅ཧίετΛ૿େͤͣ͞ʹଟ༷ͳαʔϏε
    Λఏڙ͢Δʹ͸ɺͲ͏͢Ε͹͍͍ͷ͔ɻ

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

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

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  16. 34715&ͷྫ
    w34715&
    wطଘͷ3471ʹϥϕϧ഑෍ͱ5&ʢ5SB⒏D
    &OHJOJFFSJOHʣͷػೳΛରԠ֦ͤͨ͞ுϓϩτί
    ϧ

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  17. 34715&ͷྫ
    wύέοτͷ௨աܦ࿏ͱͳΔτϯωϧΛ࡞੒͢ΔͨΊɺ
    ࣄલγάφϦϯά͕ൃੜ͢Δ
    w֤ϊʔυ͕ܦ࿏ʹؔ͢ΔεςʔτΛอ࣋͢Δ
    wŠ݁Ռ؅ཧ͕ෳࡶʹͳΓɺεέʔϥϏϦςΟͷ੍
    ໿΍໰୊ൃੜ࣌ͷରԠͷ೉͠͞ʹ௚݁͢Δ

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  18. 34715&ͷྫ
    wŨŽŘ
    w৽װઢ΋μΠΞௐ੔ͱ͍͏ਓྗγάφϦϯάΛͨ͠
    ͔Βਏ͔ͬͨ
    wʢิ଍ɿXBLBUFͷॳ೔ʹ౦๺৽װઢ͕Ұ
    ࣌ؒࢭ·ͬͨͷͰࢀՃऀΈΜͳʹӨڹͨ͠ʣ

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  19. 4FHNFOU3PVUJOHͱ͸
    w ωοτϫʔΫΛ4FHNFOUͱ͍͏ཁૉΛ༻͍ͯදݱ͠ɺ
    ͦͷ4FHNFOUΛࢦఆ͢Δ͜ͱʹΑΓύέοτͷసૹΛ
    ࣮ݱ͢ΔΞʔΩςΫνϟ
    w *&5'ͷ413*/( 4PVSDF1BDLFU3PVUJOHJO
    /FUXPSLJOH
    Ͱࡦఆ͞ΕͯΔ
    w ࣮͸஀ੜͯ͠प೥ͩͬͨΓ͢Δ
    !22

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  20. 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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  21. جૅ஌ࣝ
    !24

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  22. 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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  23. 4FHNFOUΛ
    ݩʹͨ͠େࡶ೺ͳύέοτసૹྫ
    0 1
    1 2
    4FHNFOUʮ̎ʯ
    ύέοτσʔλ
    ύέοτͷྲྀΕ
    /PEF4FHNFOUʮ̎ʯ
    Λ΍ͬͯ·͢
    !26

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

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

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

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

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

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  30. "EKBDFODZ4FHNFOU
    "EK4*%
    ͷసૹಈ࡞
    1
    4
    1
    3
    0
    2
    4*%ʮʯ
    ύέοτσʔλ





    "EK4*%
    \ ^
    !33

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  31. "EKBDFODZ4FHNFOU
    "EK4*%
    ͷసૹಈ࡞
    1
    4
    1
    3
    0
    2


    "EK4*%
    \ ^
    4*%ʮʯ
    4FHNFOU-JTU
    ύέοτσʔλ
    !34

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  32. "EKBDFODZ4FHNFOU
    "EK4*%
    ͷసૹಈ࡞
    1
    4
    1
    3
    0
    2


    "EK4*%
    \ ^
    /POF
    4FHNFOU-JTU
    ύέοτσʔλ
    !35

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

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  34. /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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  35. /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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  36. /PEFͱ"EKBDFODZΛ૊Έ߹
    Θͤͨసૹಈ࡞
    1
    4
    1
    3
    0
    2
    "EK4*%
    4*%ʮʯ
    4FHNFOU-JTU
    /PEF4*%΁సૹ
    !39

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

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

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  39. 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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  40. Ϣʔεέʔε
    !43

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

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  43. %$ͷ৑௕ߏ੒
    IUUQTXXXTMJEFTIBSFOFUMJOFDPSQTT
    !46

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  44. ඪ४Խಈ޲
    !47

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

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

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

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  48. 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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  49. 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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  50. ඪ४Խಈ޲
    w ݸਓతʹ໘ന͔ͬͨͷ͸ϕϯμʔ֤͕ࣾͲ͏͍͏ํ޲ʹ޲͖
    ͍ͨͷ͕ผ్ͷࢿྉΛ୳͢ͱ஍ຯʹಁ͚ͯΘ͔Δͱ͍͏͜ͱɽ
    IUUQTXXXOJDBEKQKBNBUFSJBMTJFUGSFQPSUNBUTVTIJNBQEG
    !53

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  51. ඪ४Խಈ޲
    IUUQTXXXOJDBEKQKBNBUFSJBMTJFUGSFQPSUNBUTVTIJNBQEG
    !54

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

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  53. ະདྷͱͦͷઌ΁
    !56

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  54. 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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  55. 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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  56. 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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  57. 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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  58. ·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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  59. ࢀߟ
    https://www.slideshare.net/tech_jstream/traffic-engineering-jtf2017
    https://docs.fd.io/vpp/17.04/srv6_doc.html
    http://www.segment-routing.net/ietf/
    https://docs.fd.io/vpp/17.04/srv6_doc.html
    https://clnv.s3.amazonaws.com/2018/anz/pdf/BRKRST-1124.pdf
    https://www.cisco.com/c/dam/assets/global/JP/training-events/events-webinars/interop/sp-03-interop2016-segment.pdf
    https://www.mpls.jp/2017/presentations/mpls_jp_2017_matsushima-post.pdf
    https://www.janog.gr.jp/meeting/janog40/application/files/7815/0104/5635/janog40-sr-mpls-miyasaka-00.pdf
    https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-central-epe/?include_text=1
    https://datatracker.ietf.org/doc/draft-ietf-spring-segment-routing-ldp-interop/?include_text=1
    https://datatracker.ietf.org/doc/draft-filsfils-spring-srv6-network-programming/?include_text=1
    !62

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  60. "SFUIFSFBOZRVFTUJPOT
    !63

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