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Our Challenges to Open Source SRv6 Data Center ...

Our Challenges to Open Source SRv6 Data Center Networking

JANOG49 Meetingの登壇資料です
https://www.janog.gr.jp/meeting/janog49/dcnsrv6/
講演者:齋藤 遼河
Verda Platform室 ネットワーク開発チーム所属

LINE Developers

January 27, 2022
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  1. ࣗݾ঺հ • -*/&גࣜձࣾ • *54$7FSEBࣨ ωοτϫʔΫ։ൃνʔϜ • ిؾ௨৴େֶ • ᶘྨ

    ηΩϡϦςΟ৘ใֶϓϩάϥϜ • 5XJUUFS'BDFCPPL(JU)VC • !QSPFMCUO ᜊ౻ ྒྷՏ 7FSEBࣨ ωοτϫʔΫ։ൃνʔϜ
  2. 43W 4FHNFOU3PVUJOHPWFS*1WEBUBQMBOF  • ιʔεϧʔςΟϯάύϥμΠϜͷҰछ • 4FHNFOUɿύέοτͷసૹઌ΍ॲཧ಺༰Λࢦࣔ͢Δ΋ͷ • 4FHNFOU3PVUJOH)FBEFS 43)

    ʹ4FHNFOU *% 4*% Λ֨ೲ͠ɺͦΕʹैͬͯύέοτΛసૹ *1W 1BZMPBE 4PVSDF"EESFTT 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 4FHNFOU3PVUJOH)FBEFS &UIFSOFU*1W*1W ʜ 4FHNFOUT-FGU ࢀߟIUUQTXXXSGDFEJUPSPSHSGDSGDIUNM IUUQTXXXSGDFEJUPSPSHSGDSGDIUNMOBNFTFHNFOUSPVUJOHIFBEFS
  3. 43W 4FHNFOU3PVUJOHPWFS*1WEBUBQMBOF  43)FBEFOE3PVUFS 4PVSDF"EESFTT 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 1BZMPBE

    4FHNFOUT-FGU 4PVSDF"EESFTT 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 1BZMPBE 4FHNFOUT-FGU 4PVSDF"EESFTT 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 4FHNFOU*% 1BZMPBE 4FHNFOUT-FGU 4FHNFOU*% 4FHNFOU*% 4FHNFOU*%
  4. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ  *' *' 7. " UBQ 73'" 7.# UBQ

    73'# 7." UBQ 73'" 7.# UBQ 73'# $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG
  5. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' 7. " UBQ 73'" 7.#

    UBQ 73'# 7." UBQ 73'" 7.# UBQ 73'# $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG
  6. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' 7. " UBQ 7.# UBQ

    73'# 7." UBQ 7.# UBQ 73'# $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG 73'" 73'" $ sudo ip route add vrf vrfA A2/32 encap seg6 mode encap segs 2001:db8:2::1 dev vrfA $ sudo ip route add 2001:db8:1::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA $ sudo ip route add vrf vrfA A1/32 encap seg6 mode encap segs 2001:db8:1::1 dev vrfA $ sudo ip route add 2001:db8:2::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA
  7. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' 7. " UBQ 7.# UBQ

    73'# 7." UBQ 7.# UBQ 73'# $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG 73'" 73'" $ sudo ip route add vrf vrfA A2/32 encap seg6 mode encap segs 2001:db8:2::1 dev vrfA $ sudo ip route add 2001:db8:1::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA $ sudo ip route add vrf vrfA A1/32 encap seg6 mode encap segs 2001:db8:1::1 dev vrfA $ sudo ip route add 2001:db8:2::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA
  8. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG EC EC EC 4FHNFOUT-FGU " "

    " " )&ODBQT $ sudo ip route add vrf vrfA A2/32 encap seg6 mode encap segs 2001:db8:2::1 dev vrfA $ sudo ip route add 2001:db8:1::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA
  9. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' 7. " UBQ 7.# UBQ

    73'# 7." UBQ 7.# UBQ 73'# $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG 73'" 73'" $ sudo ip route add vrf vrfA A2/32 encap seg6 mode encap segs 2001:db8:2::1 dev vrfA $ sudo ip route add 2001:db8:1::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA $ sudo ip route add vrf vrfA A1/32 encap seg6 mode encap segs 2001:db8:1::1 dev vrfA $ sudo ip route add 2001:db8:2::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA
  10. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG EC EC EC 4FHNFOUT-FGU " "

    " " &OE%5 73'" $ sudo ip route add vrf vrfA A2/32 encap seg6 mode encap segs 2001:db8:2::1 dev vrfA $ sudo ip route add 2001:db8:1::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA $ sudo ip route add vrf vrfA A1/32 encap seg6 mode encap segs 2001:db8:1::1 dev vrfA $ sudo ip route add 2001:db8:2::1/128 encap seg6local action End.DT4 vrftable vrfA dev vrfA
  11. 73'" 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' 7. " UBQ 7.#

    UBQ 7." UBQ 7.# UBQ $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33 CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG 73'" 73'# 73'# $ sudo ip route add vrf vrfB B2/32 encap seg6 mode encap segs 2001:db8:2::2 dev vrfA $ sudo ip route add 2001:db8:1::2/128 encap seg6local action End.DT4 vrftable vrfB dev vrfB $ sudo ip route add vrf vrfB B1/32 encap seg6 mode encap segs 2001:db8:1::2 dev vrfB $ sudo ip route add 2001:db8:2::2/128 encap seg6local action End.DT4 vrftable vrfB dev vrfB
  12. 43WΛ༻͍ͨϚϧνςφϯτωοτϫʔΫ   *' *' $PNQVUF -PDBUPSEC $PNQVUF -PDBUPSEC '33

    CHQE '33 CHQE ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOP@TSW@UTVDIJZBQEG " " EC EC EC 4FHNFOUT-FGU " " " " )&ODBQT &OE%5 7. " UBQ 73'" 7.# UBQ 73'# 7.# UBQ 73'# 7." UBQ 73'"
  13. ݱࡏͷ43WίϯτϩʔϧϓϨʔϯ $PNQVUF $POUSPMMFS 7. UBQ 73' OFVUSPOTFSWFS $PNQVUF 7. UBQ

    73' ᶃ Ծ૝Ϛγϯͷ࡞੒ ᶄ ϙʔτ৘ใͷ໰͍߹Θͤ ᶅ UBQͷઃఆ ᶆ 73'ͷઃఆ OFVUSPOBHFOU '33 OFVUSPOBHFOU '33 ᶄ ϙʔτ৘ใͷ໰͍߹Θͤ ᶆ 73'ͷઃఆ ࢀߟIUUQTXXXKBOPHHSKQNFFUJOHKBOPHBQQMJDBUJPOGJMFTKBOPHTSWJDIJIBSBQEG
  14. ݱࡏͷ43WίϯτϩʔϧϓϨʔϯͷ໰୊఺ • /FVUSPO4FSWFSͷߴෛՙ • Ծ૝Ϛγϯͷ࡞੒΍࡟আͷͨͼʹɺશͯͷ$PNQVUFϊʔυ͔Βϙʔτ৘ใͷ໰͍߹Θ͕ͤൃੜ • OFVUSPOBHFOU͕ଟ͘ͷ੹຿Λ͍࣋ͬͯΔ  UBQσόΠεͱ73'ͷؔ࿈෇͚ 

    Ծ૝Ϛγϯ΁ͷ*1ΞυϨεͷઃఆ  ଞͷ$PNQVUFϊʔυ্ͷԾ૝Ϛγϯ΁ͷૄ௨ੑͷ֬อ • 7.͕࡞੒͞ΕͨϊʔυҎ֎͸ɺ͜ͷஈ֊Ͱϙʔτ৘ใΛར༻͢Δ • ͜ͷ෦෼͕ղফ͢Δͱɺ/FVUSPO4FSWFSͷߴෛՙΛղܾͰ͖ͦ͏
  15. 3'$#(1.1-4*17JSUVBM1SJWBUF/FUXPSLT 71/T   • .1-4σʔλϓϨʔϯ্Ͱ71/Λߏ੒͢ΔͨΊͷ3'$ MP_REACH_NLRI: AFI: 1 (IPv4)

    SAFI: 128 (Labeled VPN Unicast) NLRI: Label: 19 Prefix: Route Distinguisher: 1:1 Prefix: 172.16.0.0/24 EXTENDED_COMMUNITIES: Route-Target: 1:1 1&3PVUFS 73'" 3% 35 73'# 3% 35 1&3PVUFS 73'" 3% 35 73'# 3% 35 $&3PVUFS  $&3PVUFS  #(1 ࢀߟIUUQTXXXSGDFEJUPSPSHSGDSGDIUNM
  16. • .1-4σʔλϓϨʔϯ্Ͱ71/Λߏ੒͢ΔͨΊͷ3'$ 1&3PVUFS 73'" 3% 35 73'# 3% 35 1&3PVUFS

    73'" 3% 35 73'# 3% 35 $&3PVUFS  $&3PVUFS  *1W   .1-4  -BCFM .1-4 #(1 3'$#(1.1-4*17JSUVBM1SJWBUF/FUXPSLT 71/T   ࢀߟIUUQTXXXSGDFEJUPSPSHSGDSGDIUNM
  17. ESBGUJFUGCFTTTSWTFSWJDFT  • 3'$Λ֦ு͠ɺ43W4FHNFOU*%ͷ৘ใΛ޿ใͰ͖ΔΑ͏ʹͨ͠*OUFSOFU%SBGU MP_REACH_NLRI: AFI: 1 (IPv4) SAFI: 128

    (Labeled VPN Unicast) NLRI: Label: 19 Prefix: Route Distinguisher: 1:1 Prefix: 172.16.0.0/24 EXTENDED_COMMUNITIES: Route-Target: 1:1 BGP Prefix-SID: SRv6 SID Information: Segment ID: 2001:db8:0:0:100:: SRv6 SID Structure: ... 1&3PVUFS 73'" 3% 35 73'# 3% 35 1&3PVUFS 73'" 3% 35 73'# 3% 35 $&3PVUFS  $&3PVUFS  #(1
  18. ESBGUJFUGCFTTTSWTFSWJDFT  • 3'$Λ֦ு͠ɺ43W4FHNFOU*%ͷ৘ใΛ޿ใͰ͖ΔΑ͏ʹͨ͠*OUFSOFU%SBGU 1&3PVUFS 73'" 3% 35 73'# 3%

    35 1&3PVUFS 73'" 3% 35 73'# 3% 35 $&3PVUFS  $&3PVUFS  *1W   43) 4 EC *1W #(1
  19. ESBGUJFUGCFTTTSWTFSWJDFT  $PNQVUF *' '33 CHQE $PNQVUF '33 CHQE *'

    7. " UBQ 73'" 7.# UBQ 73'# 7."` UBQ 73'" 7.#` UBQ 73'# MP_REACH_NLRI: AFI: IPv4-Unicast SAFI: MPLS-VPN NLRI: Label: 100 Prefix: 59000:100:172.16.0.0/24 Extended Community TLV: Route-Target: 59000:100 Prefix-SID TLV: SRv6 SID Information Sub-TLV: SID: 2001:db8:0:0:100:: SRv6 SID Structure Sub-Sub-TLV: ...
  20. #(1Λ༻͍ͨ৽ͨͳ43WίϯτϩʔϧϓϨʔϯ  $PNQVUF $POUSPMMFS 7. UBQ 73' OFVUSPOBHFOU OFVUSPOTFSWFS $PNQVUF

    7. UBQ 73' ᶃ Ծ૝Ϛγϯͷ࡞੒ ᶄ ϙʔτ৘ใͷ໰͍߹Θͤ ᶅ UBQͷઃఆ '33 3PVUF4FSWFS '33 OFVUSPOBHFOU '33
  21. #(1Λ༻͍ͨ৽ͨͳ43WίϯτϩʔϧϓϨʔϯ  $PNQVUF $POUSPMMFS 7. UBQ 73' OFVUSPOBHFOU OFVUSPOTFSWFS $PNQVUF

    7. UBQ 73' ᶆ '33ͷઃఆ '33 3PVUF4FSWFS '33 OFVUSPOBHFOU '33 ᶇ #(161%"5&ϝοηʔδ ᶈ #(161%"5&ϝοηʔδ ᶉ 73'΁ͷܦ࿏஫ೖ
  22. #(1Λ༻͍ͨ৽ͨͳ43WίϯτϩʔϧϓϨʔϯͷར఺ • /FVUSPO4FSWFSͷෛՙܰݮ • Ծ૝Ϛγϯ͕࡞੒͞Εͨ$PNQVUFϊʔυ͔ΒͷΈϙʔτ৘ใͷ໰͍߹Θ͕ͤൃੜ • OFVUSPOBHFOU͔Βܦ࿏੍ޚ΍σʔλϓϨʔϯͷ੍ޚͷॲཧΛ'33ʹ੾Γग़ͤͨ • #(1ͷԸܙΛड͚ΒΕΔ •

    ςφϯτͰڞ༗ͯ͠ར༻͢ΔωοτϫʔΫϦιʔε • "%%1"5)΍.VMUJQBUI3FMBYʹΑΔϚϧνύε੍ޚ • ίϞσΟςΟͳٕज़Λར༻͍ͯ͠ΔͨΊɺ৽͍࣮͠૷͕ग़͖ͯͨࡍʹ؆୯ʹஔ͖׵͑Δ͜ͱ͕Ͱ͖Δ
  23. #(1Λ༻͍ͨ৽ͨͳ43WίϯτϩʔϧϓϨʔϯͷ՝୊ • 3PVUF4FSWFSͷੑೳ໰୊ • େྔͷϐΞΛ3PVUF4FSWFSଆͰॲཧ͠ͳ͚Ε͹ͳΒͳ͍ • ֊૚తͳΞʔΩςΫνϟͷಋೖ • ίϯτϩʔϧϓϨʔϯো֐ʹΑΔܦ࿏ফࣦ໰୊ •

    ίϯτϩʔϧϓϨʔϯো֐͕σʔλϓϨʔϯͷܦ࿏Λফࣦͤͯ͞͠·͏ • 3PVUF4FSWFSͷ৑௕ߏ੒ • -POHMJWFE(SBDFGVM3FTUBSU • IUUQTEBUBUSBDLFSJFUGPSHEPDIUNMESBGUJFUGJESMPOHMJWFEHS
  24. Ծ૝ϚγϯͷηΩϡϦςΟϙϦγʔ  $PNQVUF 7. UBQ 73' *' $ sudo iptables

    -A FORWARD -o tap -m state --state ESTABLISHED -j ACCEPT $ sudo iptables -A FORWARD -o tap -j DROP
  25. ࣮ࡍʹൃੜͨ͠໰୊ $PNQVUF 7. UBQ 73' *' $ sudo iptables -A

    FORWARD -o tap -m state --state ESTABLISHED -j ACCEPT $ sudo iptables -A FORWARD -o tap -j DROP )PTU
  26. 43Wͷύέοτϑϩʔͷ໰୊఺  OG@DPOOUSBDL@DPOGJSN͕ݺͼग़͞Εͳ͍ ➔ ίωΫγϣϯͷ৘ใ͕ӬଓԽ͞Εͳ͍ )&ODBQT TFH@JOQVU *1W *' *'

    13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO OG@DPOOUSBDL@JO OG@DPOOUSBDL@DPOGJSN *' *' 13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO *1W
  27. 43Wͷύέοτϑϩʔͷ໰୊఺  )&ODBQT TFH@JOQVU *1W *' *' 13&3065*/( 10453065*/( 3PVUJOH

    %FDJTJPO OG@DPOOUSBDL@JO OG@DPOOUSBDL@DPOGJSN *' *' 13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO *1W '038"3% OG@DPOOUSBDL@DPOGJSN͕ݺ͹ΕΔ ➔ ίωΫγϣϯͷ৘ใ͸ӬଓԽ͞ΕΔ
  28. 43Wͷύέοτϑϩʔͷ໰୊఺  *' *' 13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO *'

    *' 13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO &OE%5 TFHMPDBM@JOQVU *1W *1W *1WͷίωΫγϣϯͷ৘ใΛ࢖ͬͯϑΟϧλϦϯάͰ͖ͳ͍ OG@DPOOUSBDL@JO OG@DPOOUSBDL@DPOGJSN طʹ*1WͷίωΫγϣϯͷ৘ใ͕͍͍ͭͯΔ ➔ *1WͷίωΫγϣϯͷ৘ใ͕͚ͭΒΕͳ͍
  29. 43Wͷύέοτϑϩʔͷ໰୊఺  • *1W DPOOUSBDL͕ແޮͷ৔߹ • Ծ૝Ϛγϯ͔Βग़͍ͯ͘ύέοτͷίωΫγϣϯ৘ใ͕ӬଓԽ͞Εͳ͍ • ͦͷ݁ՌɺԾ૝Ϛγϯ΁໭͖ͬͯͨύέοτΛ&45"#-*4)&%ͱͯࣝ͠ผͰ͖ͳ͍ •

    *1WDPOOUSBDL͕༗ޮͷ৔߹ • Ծ૝Ϛγϯ΁ೖͬͯ͘Δύέοτʹ*1WͷίωΫγϣϯ৘ใ͕͚ͭΒΕͯ͠·͏ • ͦͷ݁Ռɺ*1WͷίωΫγϣϯ৘ใΛ༻͍ͨϑΟϧλϦϯάʹҾ͔͔ͬΒͳ͍
  30. ղܾࡦ *' *' 13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO *' *'

    13&3065*/( '038"3% 10453065*/( 3PVUJOH %FDJTJPO *1W *1W )&ODBQT TFH@JOQVU 10453065*/( 065165 OG@DPOOUSBDL@JO OG@DPOOUSBDL@DPOGJSN OG@DPOOUSBDL@DPOGJSN͕ݺ͹ΕΔ ➔ ίωΫγϣϯͷ৘ใ͸ӬଓԽ͞ΕΔ
  31. '33ͷ43WͷରԠ • -JOVYͱҟͳΓɺ౰ॳ͸࣮૷͕ଘࡏ͍ͯ͠ͳ͔ͬͨ • .1-471/ͷ࣮૷Λϕʔεʹɺ43W-71/ͷػೳΛҰ͔Β࣮૷ͨ͠ • 4FHNFOU*%΍-PDBUPSΛ؅ཧ͢ΔϑϨʔϜϫʔΫͷ࣮૷ • 43W-71/ *1W*1W

    ͷ࣮૷ • ݱࡏ΋ɺ*4*4 &YUFOTJPOTͳͲͷػೳ΍43W-71/ͷόάमਖ਼ͳͲΛੵۃతʹߦͬͯΔ • IUUQTFOHJOFFSJOHMJOFDPSQDPNKBCMPHJOUFSOTIJQGSSPVUJOH
  32. *0493ͱͷ૬ޓ઀ଓੑݕূ  $ $ J#(1 3 '33 -PPQCBDLGE -PDBUPSEC $

    $ EC  3 *0493 -PPQCBDLGE -PDBUPSEC              5FOBOU 3% 35 5FOBOU 3% 35
  33. Φʔϓϯιʔειϑτ΢ΣΞͰߏங͢ΔϝϦοτ • ͦ͜Ͱಈ͘γεςϜͷιʔείʔυ͕ݟ͓͑ͯΓɺԿ͕ߦΘΕ͍ͯΔͷ͔Λࣗ෼ͨͪͰ೺ѲͰ͖Δ఺ • ෆՄղͳڍಈΛ͍ͯͯ͠΋ɺࣗ෼ͨͪͰݪҼΛ௥ٻ͢Δ͜ͱ͕Ͱ͖Δ • CQGUSBDFͳͲͷطଘͷπʔϧྨΛར׆༻Ͱ͖Δ • ׳Εͯ͘Δͱʮ͖ͬͱ͋ͷลΓ͕͓͔͍͠ʯͱͳͬͯमਖ਼΋͠΍͘͢ͳΔ •

    ࣗ෼͕ͨͪར༻͍ͯ͠ΔγεςϜʹର͢Δਂ͍ཧղΛಘΔ͜ͱ͕Ͱ͖Δ • طଘͷΤίγεςϜʹ૬৐Γ͢Δ͜ͱ͕Ͱ͖Δ఺ • ҆ఆͨ͠#(1ͷ࣮૷ʹར༻͍ͨ͠ػೳΛ࣮૷͍ͯ͘͜͠ͱͰɺ૒ํʹͱͬͯϝϦοτ͕ੜ·ΕΔ • શͯҰ͔Β࣮૷͢ΔΑΓ΋ɺ҆ఆͯ͠ૣ࣮͘૷Ͱ͖Δ • ৽͍͠ػೳΛ࣮૷͢Δ͜ͱͰɺؐݩ͢Δ͜ͱ΋Ͱ͖Δ • Ұ౓ߦ࣮ͬͨ૷͕҆ఆͯ͠Ξοϓσʔτ͞ΕΔ͜ͱ΋ظ଴Ͱ͖Δ
  34. Φʔϓϯιʔειϑτ΢ΣΞͰߏங͢ΔϝϦοτ • ࣗ෼ͨͪͷ௅ઓ͕ίϛϡχςΟʹؐݩ͞ΕΔ఺ • ͔ͤͬ͘ͳΒΈΜͳʹ࢖ͬͯ΋Β͑ͨ΄͏͕خ͍͠ • TZTDUM McHSFQMXUVOOFM Λͨ͠Βࣗ෼ͷ࣮૷͕ݟ͑Δ •

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  37. "QQFOEJY#43Wͷ֓ཁ  • ιʔεϧʔςΟϯάύϥμΠϜͷҰछ • 4FHNFOUɿύέοτͷసૹઌ΍ॲཧ಺༰Λࢦࣔ͢Δ΋ͷ • 4FHNFOU3PVUJOH)FBEFS 43) ʹ4FHNFOU

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