Cable Modem IPV6

SB 6121 Cable Modem is fully IPV6 compatible. Cox is telling me IPV6 is now enabled. For years I have had to use IPV6 tunnelbroker for IPV6 access.

interface Tunnel1
 description Hurricane Electric IPv6 Tunnel Broker
 no ip address
 ip mtu 1480
 ip virtual-reassembly in
 shutdown
 ipv6 address FE80::1 link-local
 ipv6 address x:x:x:x::2/64
 ipv6 enable
 no ipv6 redirects
 ipv6 inspect IPV6 out
 ipv6 traffic-filter IPV6 in
 tunnel source x.x.x.x
 tunnel mode ipv6ip
 tunnel destination 216.66.22.2
!
interface FastEthernet0/0
 ip address dhcp
 ip access-group 101 in
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
 ipv6 address dhcp
 ipv6 address FE80::1 link-local
 ipv6 address autoconfig
 ipv6 enable

ipv6 route ::/0 Tunnel 1

Tommynet(config)#do ping 2001:470:20::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:470:20::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/20/24 ms
Tommynet(config)#

I have made the changes to my router to use the IPV6 via the outgoing interface and dual stacking already enable for tunnel broker.

Tommynet(config)#int tun 1
Tommynet(config-if)#shut
Tommynet(config-if)#no ipv6 route ::/0 tunnel 1
Tommynet(config)#ipv6 route ::/0 fastethernet 0/0
Tommynet(config)#do sh ipv6 int f0/0

FastEthernet0/0 is up, line protocol is up
  IPv6 is enabled, link-local address is FE80::1
  No Virtual link-local address(es):
  Stateless address autoconfig enabled
  Global unicast address(es):
    2600:8805:7F30:0:C523:5FF3:694:2FC6, subnet is 2600:8805:7F30:0:C523:5FF3:694:2FC6/128
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::1:FF00:1
    FF02::1:FF94:2FC6
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  Input features: Common pak subblock
  Output features: Firewall Inspection
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds (using 30000)
  ND advertised reachable time is 0 (unspecified)
  ND advertised retransmit interval is 0 (unspecified)
  ND router advertisements are sent every 200 seconds
  ND router advertisements live for 1800 seconds
  ND advertised default router preference is Medium
  Hosts use stateless autoconfig for addresses.

interface FastEthernet0/0
 ip address dhcp
 ip access-group 101 in
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
 ipv6 address dhcp
 ipv6 address FE80::1 link-local
 ipv6 address autoconfig
 ipv6 enable

Tommynet(config)#do sh ipv6 route
IPv6 Routing Table - default - 5 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
       D - EIGRP, EX - EIGRP external, ND - Neighbor Discovery, l - LISP
       O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
       ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
S   ::/0 [1/0]
     via FastEthernet0/0, directly connected
C   2001:470:E2C0:1::/64 [0/0]
     via Vlan2, directly connected
L   2001:470:E2C0:1::1/128 [0/0]
     via Vlan2, receive
LC  2600:8805:7F30:0:C523:5FF3:694:2FC6/128 [0/0]
     via FastEthernet0/0, receive
L   FF00::/8 [0/0]
     via Null0, receive
Tommynet(config)#do ping ipv6 2001:470:20::2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:470:20::2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
Tommynet(config)#

By all accounts this should ping and it does not. Cox is telling me my modem is configured to do IPV6 but clearly not through Cox network. It appears the router has the IPV6 address assigned via autoconfig and that address is pingable. The rout is there to cox via f0/0 but it does not work. When I went back to the tunnel it pings fine. What the hey Cox. Is your IPV6 up or not.