Есть следующая схема:
cisco-7200 <-> Cisco-3750

Не могу с 7200 пинговать другие порты на 3750 через IPv6
Debug на 7200 показывает IPv6: Encapsulation failed

Подскажите, в чем может быть проблема?

Конфиг с 7200:
------------------------
!
ipv6 unicast-routing
!
interface GigabitEthernet0/1
no ip virtual-reassembly
ipv6 address 2001:1:2::1/48
ipv6 enable
!

Конфиг с 3750:
----------------------
! Маршрутизация на cisco-7200
ipv6 unicast-routing
ipv6 route ::/0 2001:1:2::1
!
interface GigabitEthernet1/0/3
description - Gateway to 7200 -
no switchport
ipv6 address 2001:1:2::2/126
!
interface GigabitEthernet1/0/13
description - Local network -
switchport access vlan 10
switchport mode access
no cdp enable
spanning-tree portfast
!
interface Vlan10
description - Local network -
ipv6 address 2001:1:2:3::1/64
ipv6 enable
ipv6 nd prefix 2001:1:2:3::/64
---------------------------------------------------------------

Команды для диагностики:
---------------------------

7200-router#ping 2001:1:2::2

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

7200-router#ping ipv6 2001:1:2:3::1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:1:2:3::1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

7200-router#debug ipv6 packet
7200-router#ping ipv6 2001:1:2:3::1

10w0d: IPv6: SAS picked source 2001:1:2::1 for 2001:1:2:3::1 (GigabitEthernet0/1)
10w0d: IPV6: source 2001:1:2::1 (local)
10w0d:       dest 2001:1:2:3::1 (GigabitEthernet0/1)
10w0d:       traffic class 0, flow 0x0, len 100+0, prot 58, hops 64, originating
10w0d: IPV6: source 2001:1:2::1 (local)
10w0d:       dest FF02::1:FF00:1 (GigabitEthernet0/1)
10w0d:       traffic class 224, flow 0x0, len 72+8, prot 58, hops 255, originating
10w0d: IPv6: Sending on GigabitEthernet0/1
10w0d: IPv6: Encapsulation failed
10w0d: IPv6: Resolving next hop 2001:1:2:3::1 on interface GigabitEthernet0/1
10w0d: IPv6: Resolving next hop 2001:1:2:3::1 on interface GigabitEthernet0/1
10w0d: IPV6: source 2001:1:2::1 (local)
10w0d:       dest FF02::1:FF00:1 (GigabitEthernet0/1)
10w0d:       traffic class 224, flow 0x0, len 72+8, prot 58, hops 255, originating
10w0d: IPv6: Sending on GigabitEthernet0/1.
10w0d: IPV6: source 2001:1:2::1 (local)
10w0d:       dest FF02::1:FF00:1 (GigabitEthernet0/1)
10w0d:       traffic class 224, flow 0x0, len 72+8, prot 58, hops 255, originating
10w0d: IPv6: Sending on GigabitEthernet0/1
-----------------------------------------------
здесь была интересная строчка: "IPv6: Encapsulation failed"
не понимаю что за encapsulation