电子发烧友App
实验拓扑
实验需求
R1、R2完成接口IPv6地址的配置；
R1、R2按图示运行OSPF。R2的三个Loopback接口并不直接激活OSPFv3，而是以重发布的形式注入；
在R1、R2上分别执行OSPF路由汇总，使得双方的路由表中关于对方的Loopback只学习到一条汇总路由。
实验步骤及配置
R1、R2完成接口IPv6地址的配置
R1的配置如下：
[R1] ipv6 [R1] interface gigabitEthernet0/0/0 [R1-GgabitEthernet0/0/0] ipv6 enable [R1-GgabitEthernet0/0/0] ipv6 address 2001:1 64 [R1-GgabitEthernet0/0/0] quit [R1] interface loopback1 [R1-LoopBack1] ipv6 enable [R1-LoopBack1] ipv6 address 20011::FFFF 64 [R1] interface loopback2 [R1-LoopBack2] ipv6 enable [R1-LoopBack2] ipv6 address 20012::FFFF 64 [R1] interface loopback3 [R1-LoopBack3] ipv6 enable [R1-LoopBack3] ipv6 address 20013::FFFF 64
R2的配置如下：
[R2] ipv6 [R2] interface gigabitEthernet0/0/0 [R2-GgabitEthernet0/0/0] ipv6 enable [R2-GgabitEthernet0/0/0] ipv6 address 2001:2 64 [R2-GgabitEthernet0/0/0] quit [R2] interface loopback1 [R2-LoopBack1] ipv6 enable [R2-LoopBack1] ipv6 address 20011::FFFF 64 [R2] interface loopback2 [R2-LoopBack2] ipv6 enable [R2-LoopBack2] ipv6 address 20012::FFFF 64 [R2] interface loopback3 [R2-LoopBack3] ipv6 enable [R2-LoopBack3] ipv6 address 20013::FFFF 64
R1、R2运行OSPFv3
R1的配置如下：
[R1] ospfv3 1 [R1-ospfv3-1] router-id 1.1.1.1 [R1-ospfv3-1] quit [R1] interface gigabitEthernet0/0/0 [R1-GgabitEthernet0/0/0] ospfv3 1 area 0 [R1] interface loopback 1 [R1-LoopBack1] ospfv3 1 area 1 [R1] interface loopback 2 [R1-LoopBack2] ospfv3 1 area 1 [R1] interface loopback 3 [R1-LoopBack3] ospfv3 1 area 1
R2的配置如下：
[R2] ospfv3 1 [R2-ospfv3-1] router-id 2.2.2.2 [R2-ospfv3-1] import-route direct #将直连路由重发布到OSPF [R2-ospfv3-1] quit [R2] interface gigabitEthernet0/0/0 [R2-GgabitEthernet0/0/0] ospfv3 1 area 0
完成上述配置后，查看一下R1、R2的路由表：
[R1] display ipv6 routing-table protocol ospfv3 Public Routing Table : OSPFv3 Summary Count : 7 OSPFv3 Routing Table's Status : < Active > Summary Count : 3 Destination : 20011:: PrefixLength : 64 NextHop : FE80:FCFF4314 Preference : 150 Cost : 1 Protocol : OSPFv3ASE RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D Destination : 20012:: PrefixLength : 64 NextHop : FE80:FCFF4314 Preference : 150 Cost : 1 Protocol : OSPFv3ASE RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D Destination : 20013:: PrefixLength : 64 NextHop : FE80:FCFF4314 Preference : 150 Cost : 1 Protocol : OSPFv3ASE RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D
R1已经通过OSPFv3学习到R2的三个Loopback接口路由。
[R2] display ipv6 routing-table protocol ospfv3 Public Routing Table : OSPFv3 Summary Count : 4 OSPFv3 Routing Table's Status : < Active > Summary Count : 3 Destination : 20011::FFFF PrefixLength : 128 NextHop : FE80:FCFF416B Preference : 10 Cost : 1 Protocol : OSPFv3 RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D Destination : 20012::FFFF PrefixLength : 128 NextHop : FE80:FCFF416B Preference : 10 Cost : 1 Protocol : OSPFv3 RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D Destination : 20013::FFFF PrefixLength : 128 NextHop : FE80:FCFF416B Preference : 10 Cost : 1 Protocol : OSPFv3 RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D
R2也已经学习到了R1的Loopback接口路由，这些路由在R2的路由表中以/128掩码的形式存在，这是正常的，因为缺省情况下OSPF将Loopback接口视为stub host，因此以主机路由的形式通告之。
R1、R2部署OSPFv3路由汇总
首先在R1上部署路由汇总，将Area 1内的路由汇总成2001:/32。R1的配置如下：
[R1] ospfv3 1 [R1-ospfv3-1] area 1 [R1-ospfv3-1-area-0.0.0.1] abr-summary 2001: 32
完成上述配置后，R2的路由表就变精简了，R1不会再将自己Loopback接口的路由以明细的方式通告出去，而是通告一条汇总路由：2001:/32：
[R2] display ipv6 routing-table protocol ospf Public Routing Table : OSPFv3 Summary Count : 2 OSPFv3 Routing Table's Status : < Active > Summary Count : 1 Destination : 2001: PrefixLength : 32 NextHop : FE80:FCFF416B Preference : 10 Cost : 1 Protocol : OSPFv3 RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D
接着在ASBR R2上执行路由汇总，这种路由汇总方式是对注入到OSPF的外部路由进行的路由汇总，汇总后的路由是2001:/32，R2的配置如下：
[R2] ospfv3 1 [R2-ospfv3-1] asbr-summary 2001: 32
完成上述配置后R1的路由表也精简了：
[R1] display ipv6 routing-table protocol ospfv3 Public Routing Table : OSPFv3 Summary Count : 5 OSPFv3 Routing Table's Status : < Active > Summary Count : 1 Destination : 2001: PrefixLength : 32 NextHop : FE80:FCFF4314 Preference : 150 Cost : 2 Protocol : OSPFv3ASE RelayNextHop : :: TunnelID : 0x0 Interface : GigabitEthernet0/0/0 Flags : D
审核编辑：汤梓红
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