IPv6 over IPv4（手動）

通信要件を整理していたら、やりたい事がどうもIPv4のネットワーク越しにIPv6通信を実現したい模様。

とりあえず手動でのトンネリングで検証

<R1>

 interface FastEthernet0
ip address 10.1.1.1 255.255.255.0
duplex auto
speed auto
!
interface Loopback0
no ip address
ipv6 address 2001:1::1/64
ipv6 enable
!
interface Tunnel0
no ip address
ipv6 address 2002:1::1/64
tunnel source 10.1.1.1
tunnel mode ipv6ip
tunnel destination 10.1.2.1
!
ip route 0.0.0.0 0.0.0.0 10.1.1.2
ipv6 route 2001::/64 Tunnel0

<R2>

 interface FastEthernet0
ip address 10.1.2.1 255.255.255.0
duplex auto
speed auto
!
interface Loopback0
no ip address
ipv6 address 2001::1/64
ipv6 enable
!
interface Tunnel0
no ip address
ipv6 address 2002::1/64
ipv6 enable
tunnel source 10.1.2.1
tunnel mode ipv6ip
tunnel destination 10.1.1.1
!
ip route 0.0.0.0 0.0.0.0 10.1.2.2
ipv6 route 2001:1::/64 Tunnel0

以下が確認結果

R2#ping 2001:1::1 source loop0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:1::1, timeout is 2 seconds:
Packet sent with a source address of 2001::1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/1/4 ms

とりあえず検証は終わり