山梨県情報通信業協会セミナー資料

5.
21. IPv6
22. CGN,
23.
24. IPv4 IPv6
25. L2 IPv6
26. PMTUD BlackHole
27. CPE
28. IRR
29. DNS OS
30.

7.
21. IPv6
22. CGN,
23.
24. IPv4 IPv6
25. L2 IPv6
26. PMTUD BlackHole
27. CPE
28. IRR
29. DNS OS
30.

11. • ICMP%Error%Message type%0 127
– Des&na&on*Unreachable type*1
– Packet*Too*Big type*2
– Time*Exceeded type*3
– Parameter*Problem type*4 *
• ICMP%Informa7onal%Message type%128 255
– Echo*Request type*128
– Echo*Reply type*129
– Router*Solicita&on type*133
– Router*Adver&sement type*134
– Neighbor*Solicita&on type*135
– Neighbor*Adver&sement type*136 *
– Redirect*Message*(type137)

12. • IPv6% %
– IPv4%
– ICMPv6%Error%Message% MTU%
• MTU%
• ICMPv6%Packet%Too%Big%Message%
– IPv6 MTU% 1280byte%
• L2%SW MTU %
• Path%MTU%Discovery% 1280byte%
MTU1500* MTU1454* MTU1500* MTU1280* MTU1500*
client% Server%
Size=1500*
Packet%Too%Big%(MTU=1454) Size=1454*
Packet%Too%Big%(MTU=1280) Size=1280*

13. NDP
5
• Neighbor*Solicita&on NS
– ARP
– DAD NUD
• Neighbor*Adver&sement NA
– NS
• Router*Solicita&on RS
–
– RA
• Router*Adver&sement RA
–
–
• Redirect
– IPv4

14. • NUD*( )**
• 255 Hop*Limit
• ARP
• FF02::1:FF00:0000 FF02::1:FFFF:FFFF
Neighbor%Adver7sement%
2001:db8:1::1* 2001:db8:1::2*
Src=2001:db8:1::2%
0011.2233.4401* Dst=2001:db8:1::1% 0011.2233.4402*
Target%%MAC%0011.2233.4402%
Neighbor%Solicita7on%
Src=2001:db8:1::1% × 2001:db8:1::3*
Dst=ff02::1:ff00:2% 0011.2233.4403*
Target%2001:db8:1::2%
104*bits* 24*bits*
ff02::1:ff* Unicast 3byte*
Mul&cast*Address Ethernet*Address
2001:db8:1::0000:0002**(2001:db8:1::2)*
ff02::1:ff00:0002**(ff02::1:ff00:2)*
ff02::1:ff00:0002**(ff02::1:ff00:2)* Dst*Ethernet*Address 33:33:ff:00:00:02*
”33:33” Mul&cast 4byte

15. • RS FF02::2 Hop*Limit 255*
• RA FF02::1 RS Hop*Limit 255*
• RA Current**Hop*Limit
• M]flag 0 1 DHCPv6
• O]flag 1 DHCPv6
• Router*Life&me 1 65535
• DRP Default*Router*Preference RFC4191
– High 01 Medium 00 Low 11
–
Router%Solicita7on%
Src=FE80::1% FE80::2*
FE80::1*
Dst=FF02::2%
Router%Adver7sement%
Src=FE80::2%
Dst=FF02::1%(or%FE80::1)%
Data=Subnet%prefix,%life7me,%current%hop%limit%
%%%%%%%%%%%Flag%(management,%other)%,%preference%

18.
MTU1500* MTU1454* MTU1500* MTU1280* MTU1500*
client% Server%
Size=1500*
Packet%Too%Big%(MTU=1454) Size=1454*
Packet%Too%Big%(MTU=1280) Size=1280*