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至顶网网络频道路由交换双nat路由试验,走ospf动态路由

双nat路由试验,走ospf动态路由

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一台路由器(R2)三个接口,一个接内部网络,二个接ISP1(R1)和ISP2(R3),把二个ISP的出口接入同一个交换机,然后在交换机外再接一台路由器(route),二个ISP即(R1,R3,router)走ospf 动态路由,再R2上做策略路由,根据下一跳地址来做路由决定。

来源:chinaitlab 2010年4月14日

关键字: OSPF 路由协议

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  试验环境:

  一台路由器(R2)三个接口,一个接内部网络,二个接ISP1(R1)和ISP2(R3),把二个ISP的出口接入同一个交换机,然后在交换机外再接一台路由器(route),二个ISP即(R1,R3,router)走ospf 动态路由,再R2上做策略路由,根据下一跳地址来做路由决定。

  ---R3 ---

  route---        ----R2----内部网络

  ---R1 ---

  R3#sh run

  Building configuration...

  Current configuration : 902 bytes

  !

  version 12.2

  service timestamps debug uptime

  service timestamps log uptime

  no service password-encryption

  !

  hostname R3

  !

  enable secret 5 $1$yd5D$PSCihTgQQhhAsLJRhZYBI.

  !

  ip subnet-zero

  no ip domain-lookup

  ip host R3 192.168.23.3

  !

  !

  !

  !

  !

  interface Loopback0

  ip address 3.3.3.3 255.255.255.0

  !

  interface Ethernet0

  ip address 172.16.13.3 255.255.255.0

  !

  interface Serial0

  no ip address

  shutdown

  !

  interface Serial1

  ip address 192.168.23.3 255.255.255.0

  !

  router ospf 1

  router-id 3.3.3.3

  log-adjacency-changes

  redistribute connected subnets

  redistribute static subnets

  network 172.16.13.0 0.0.0.255 area 0

  !

  ip classless

  ip route 192.168.100.0 255.255.255.0 192.168.23.2

  ip http server

  !

  snmp-server community public RO

  snmp-server community private RW

  snmp-server enable traps tty

  !

  line con 0

  logging synchronous

  line aux 0

  line vty 0 4

  password cisco

  logging synchronous

  login

  !

  end

  R3#

  R2#

  R2#sh run

  Building configuration...

  Current configuration : 1667 bytes

  !

  version 12.1

  no service single-slot-reload-enable

  service timestamps debug uptime

  service timestamps log uptime

  no service password-encryption

  !

  hostname R2

  !

  logging rate-limit console 10 except errors

  enable secret 5 $1$yOVt$dwGkyiFW674ow6bsPMdgZ0

  !

  ip subnet-zero

  no ip finger

  no ip domain-lookup

  ip host R2 192.168.12.1

  ip host R3 192.168.23.3

  !

  cns event-service server

  !

  !

  !

  !

  !

  interface Loopback0

  ip address 2.2.2.2 255.255.255.0

  !

  interface Ethernet0

  ip address 192.168.100.107 255.255.255.0

  ip nat inside

  !

  interface Serial0

  ip address 192.168.12.2 255.255.255.0

  ip nat outside

  clockrate 64000

  !

  interface Serial1

  ip address 192.168.23.2 255.255.255.0

  ip nat outside

  clockrate 64000

  !

  interface Serial2

  no ip address

  shutdown

  !

  interface Serial3

  no ip address

  shutdown

  !

  interface BRI0

  no ip address

  shutdown

  !

  ip kerberos source-interface any

  ip nat inside source route-map nat interface Serial1 overload

  ip nat inside source route-map test interface Serial0 overload

  ip classless

  ip route 172.16.13.0 255.255.255.0 192.168.23.3

  ip route 172.16.13.0 255.255.255.0 192.168.12.1

  no ip http server

  !

  access-list 1 permit 192.168.100.199

  access-list 1 permit 192.168.100.233

  access-list 1 permit 192.168.100.224

  access-list 9 permit 192.168.12.1

  access-list 10 permit 192.168.23.3

  route-map test permit 10

  match ip address 1

  match ip next-hop 9

  !

  route-map cisco permit 10

  !

  route-map nat permit 10

  match ip address 1

  match ip next-hop 10

  !

  !

  snmp-server community public RO

  snmp-server community private RW

  !

  line con 0

  logging synchronous

  transport input none

  line aux 0

  line vty 0 4

  password cisco

  logging synchronous

  login

  !

  end

  R2#

  R1#sh run

  Building configuration...

  Current configuration : 1017 bytes

  !

  version 12.1

  no service single-slot-reload-enable

  service timestamps debug uptime

  service timestamps log uptime

  no service password-encryption

  !

  hostname R1

  !

  no logging rate-limit

  enable secret 5 $1$Ogll$BSpS5/nOBq8HtaKfwOZ8W0

  !

  ip subnet-zero

  no ip finger

  no ip domain-lookup

  !

  frame-relay switching

  cns event-service server

  !

  !

  !

  !

  !

  interface Loopback0

  ip address 4.4.4.4 255.255.255.0

  !

  interface Ethernet0

  ip address 172.16.13.1 255.255.255.0

  !

  interface Serial0

  ip address 192.168.12.1 255.255.255.0

  !

  interface Serial1

  no ip address

  !

  router ospf 1

  router-id 4.4.4.4

  log-adjacency-changes

  redistribute connected subnets

  redistribute static subnets

  network 172.16.13.0 0.0.0.255 area 0

  !

  ip kerberos source-interface any

  ip classless

  ip route 192.168.100.0 255.255.255.0 192.168.12.2

  ip http server

  !

  !

  snmp-server community public RO

  snmp-server community private RW

  !

  line con 0

  logging synchronous

  transport input none

  line aux 0

  line vty 0 4

  password cisco

  logging synchronous

  login

  !

  end

  R1#

  Router#sh run

  Building configuration...

  Current configuration : 769 bytes

  !

  version 12.2

  service timestamps debug datetime msec

  service timestamps log datetime msec

  no service password-encryption

  !

  hostname Router

  !

  logging queue-limit 100

  enable secret 5 $1$9esl$iWZwf6dLviD/956PWJoOT0

  !

  memory-size iomem 25

  ip subnet-zero

  !

  !

  !

  !

  !

  !

  !

  interface Loopback0

  ip address 5.5.5.5 255.255.255.0

  !

  interface Ethernet0

  no ip address

  shutdown

  half-duplex

  !

  interface FastEthernet0

  ip address 172.16.13.254 255.255.255.0

  speed auto

  !

  interface Serial0

  no ip address

  shutdown

  !

  interface Serial1

  no ip address

  shutdown

  !

  router ospf 1

  router-id 5.5.5.5

  log-adjacency-changes

  network 172.16.13.0 0.0.0.255 area 0

  !

  ip classless

  no ip http server

  !

  !

  !

  line con 0

  line aux 0

  line vty 0 4

  password cisco

  login

  !

  no scheduler allocate

  end

  Router#

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