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使用cisco路由器实现IPV6 tunnel

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说明:此案例使用两台cisco2500路由器,IOS (tm) 2500 Software (C2500-IS-L), Version 12.2(15)T9,利用ip v4主干加ipv6的6to4 tunnel结合ipv6静态路由,就能实现两个远程ipv6子网的互连互通.

  拓扑说明:使用两台路由器的e0接口互连仿真ipv4的主干,使用loopback0仿真两个远程的ipv6子网,6to4tunnel必须在所有的ipv6子网使用标准的ipv6地址前缀(2002::/16)进行编址.

  在两个端点建立tunnel时,必须使用本地路由器的ipv4接口的ip地址结合2002前缀来对本路由器的tunnel接口做编址.例如R1的e0:192.168.1.1,则R1的tunnel接口的ipv6地址一定要包含此地址的16进制格式,即2002:C0A8:101:…,其中C0A8:101即为e0接口ip地址的16进制.

配置和测试结果如下:
R1#sh run
hostname R1
ipv6 unicast-routing
interface Loopback0
  no ip address
  ipv6 address 2002:C0A8:101:1::1/64
interface Tunnel0
  no ip address
  no ip redirects
  ipv6 address 2002:C0A8:101:13::1/64
  tunnel source Ethernet0
  tunnel mode ipv6ip 6to4
interface Ethernet0
  ip address 192.168.1.1 255.255.255.0
ipv6 route 2002::/16 Tunnel0

R1#sh ipv6 int brief
Ethernet0        [up/up]
  unassigned
Loopback0        [up/up]
  FE80::210:7BFF:FE36:491
  2002:C0A8:101:1::1
Tunnel0         [up/up]
  FE80::C0A8:101
  2002:C0A8:101:13::1
Virtual-Access1     [up/up]
  unassigned

R1#sh ipv6 route
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
  O - OSPF intra, OI - OSPF inter, OE1 - OSPF

ext 1, OE2 - OSPF ext 2
S 2002::/16 [1/0]
  via ::, Tunnel0
C 2002:C0A8:101:1::/64 [0/0]
  via ::, Loopback0
L 2002:C0A8:101:1::1/128 [0/0]
  via ::, Loopback0
C 2002:C0A8:101:13::/64 [0/0]
  via ::, Tunnel0
L 2002:C0A8:101:13::1/128 [0/0]
  via ::, Tunnel0
L FE80::/10 [0/0]
  via ::, Null0
L FF00::/8 [0/0]
  via ::, Null0

r3#sh run
hostname r3
ipv6 unicast-routing
interface Loopback0
 no ip address
 ipv6 address 2002:C0A8:103:3::3/64
interface Tunnel0
 no ip address
 no ip redirects
 ipv6 address 2002:C0A8:103:13::3/64
 tunnel source Ethernet0
 tunnel mode ipv6ip 6to4

interface Ethernet0
 ip address 192.168.1.3 255.255.255.0

ipv6 route 2002::/16 Tunnel0

r3#sh ipv6 int brief
Ethernet0      [up/up]
  unassigned
Loopback0      [up/up]
  FE80::200:CFF:FE0A:26BC
  2002:C0A8:103:3::3
Serial0       [administratively

down/down]
  unassigned
Serial1       [administratively

down/down]
  unassigned
Tunnel0       [up/up]
  FE80::C0A8:103
  2002:C0A8:103:13::3
Virtual-Access1   [up/up]
  unassigned
r3#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
  O - OSPF intra, OI - OSPF inter, OE1 - OSPF

ext 1, OE2 - OSPF ext 2
S 2002::/16 [1/0]
  via ::, Tunnel0
C 2002:C0A8:103:3::/64 [0/0]
  via ::, Loopback0
L 2002:C0A8:103:3::3/128 [0/0]
  via ::, Loopback0
C 2002:C0A8:103:13::/64 [0/0]
  via ::, Tunnel0
L 2002:C0A8:103:13::3/128 [0/0]
  via ::, Tunnel0
L FE80::/10 [0/0]
  via ::, Null0
L FF00::/8 [0/0]
  via ::, Null0

在R1上测试直连的ipv6 tunnel接口:
R1#ping ipv6 2002:c0a8:103:13::3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to

2002:C0A8:103:13::3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip

min/avg/max = 8/10/16 ms


在R1上测试到R3的ipv6 loopback0接口(非直连):
R1#ping ipv6 2002:c0a8:103:3::3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to

2002:C0A8:103:3::3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip

min/avg/max = 8/12/16 ms

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