CCNP知识要点：ipv6隧道配置的拓扑图、命令行和注解

配置：
r1:
ipv6 unicast-routing 开启ipv6单播，必须要打这条命令，否则ipv6不会启用。
in e1/0
ipv6 add 2000::1/64  定义ipv6地址
no sh
ipv6 ospf 1 a 0  在接口上定义ospfv3属于哪个区域
ipv6 router ospf 1  启用ospfv3，必须手工定义路由器id，否则ospfv3不会启用
router-id 1.1.1.1
r2:
ipv6 unicast-routing
in e1/0
ipv6 add 2000::2/64
no sh
ipv6 ospf 1 a 0
in e1/1
ip add 192.168.1.1 255.255.255.0
no sh
ipv6 router ospf 1
router-id 2.2.2.2
in tunnel 0  定义一个隧道接口0
ipv6 add 2001::1/64 隧道ipv6地址，必须和对端隧道ipv6地址属于同一网段
tunnel source 192.168.1.1 隧道源ipv4地址，可以不在同一个网段
tunnel destnation 192.168.1.2  隧道目的ipv4地址
tunnel mode ipv6ip  隧道类型为ipv6ip
ipv6 ospf 1 a 0
r3:
ipv6 unicast-routing
in e1/0
ip add 192.168.1.2 255.255.255.0
no sh
in e1/1
ipv6 add 2002::1/64
no sh
ipv6 ospf 1 a 0
ipv6 router ospf 1
router-id 3.3.3.3
in tunnel 0  参考上面的说明
ipv6 add 2001::2/64
tunnel source 192.168.1.2
tunnel destnation 192.168.1.1
tunnel mode ipv6ip
ipv6 ospf 1 a 0
r4:
ipv6 unicast-routing
ipv6 router ospf 1
router-id 4.4.4.4
in e1/0
ipv6 add 2002::2/64
no sh
ipv6 ospf 1 a 0

验证命令：
show ipv6 route 查看ipv6路由表
http://www.luyouqiwang.com/14450/ 
ping

查看r1路由表
R1#show ipv6 ro
IPv6 Routing Table - 8 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   2000::/64 [0/0]
     via ::, Ethernet1/0
L   2000::1/128 [0/0]
     via ::, Ethernet1/0
O   2001::/64 [110/11121]
     via FE80::C801:14FF:FE3C:1C, Ethernet1/0
O   2002::/64 [110/11131]
     via FE80::C801:14FF:FE3C:1C, Ethernet1/0
C   2012:5:19::/64 [0/0]
     via ::, Ethernet1/0
L   2012:5:19::1/128 [0/0]
     via ::, Ethernet1/0
L   FE80::/10 [0/0]
     via ::, Null0
L   FF00::/8 [0/0]

     via ::, Null0
已经学到r4的路由和隧道接口的ipv6地址
再ping，能够ping通就正常了
R1#ping 2002::2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2002::2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 44/108/136 ms