■

■R3_3640A
conf t
!
ipv6 unicast-routing
!
interface Tunnel1
tunnel source fa0/0
tunnel mode ipv6ip auto-tunnel
!
interface Loopback0
ipv6 address 2001:1:1:1::1/64
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
no shut
!
ipv6 route 2001:2:2:2::/64 tunnel1 ::192.168.1.2
!
end

■R4_3640
conf t
!
ipv6 unicast-routing
!
interface Tunnel1
tunnel source fa0/0
tunnel mode ipv6ip auto-tunnel
!
interface Loopback0
ipv6 address 2001:2:2:2::2/64
!
interface FastEthernet0/0
ip address 192.168.1.2 255.255.255.0
no shut
!
ipv6 route 2001:1:1:1::/64 tunnel1 ::192.168.1.1
!
end

■Auto Tunnelのインターフェイス状態を見る
R3_3640A#sh ipv6 int tunnel1
Tunnel1 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::C0A8:101
Global unicast address(es):
::192.168.1.1, subnet is ::/96 [NEG]
Joined group address(es):
FF02::1
FF02::2
FF02::1:FFA8:101
MTU is 1480 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ND DAD is not supported
ND reachable time is 30000 milliseconds
Hosts use stateless autoconfig for addresses.

■R3のルーティングテーブルを確認する
R3_3640A#sh ipv6 route
IPv6 Routing Table - 7 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
C ::/96 [0/0]
via ::, Tunnel1
L ::192.168.1.1/128 [0/0]
via ::, Tunnel1
C 2001:1:1:1::/64 [0/0]
via ::, Loopback0
L 2001:1:1:1::1/128 [0/0]
via ::, Loopback0
S 2001:2:2:2::/64 [1/0]
via ::192.168.1.2, Tunnel1
L FE80::/10 [0/0]
via ::, Null0
L FF00::/8 [0/0]
via ::, Null0

■対向ルータ側のipv6プレフィクスに対してping
R3_3640A#ping 2001:2:2:2::2 source 2001:1:1:1::1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:2:2:2::2, timeout is 2 seconds:
Packet sent with a source address of 2001:1:1:1::1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/3/4 ms