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至顶网网络频道全球路由表应用举例

全球路由表应用举例

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全球路由表应用举例

作者:中国IT实验室 2007年8月17日

关键字: 防火墙 硬件防火墙 软件防火墙 cisco防火墙 防火墙设置 Linux防火墙

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  CE 1

  hostname CE-1

  ip subnet-zero

  !

  interface Loopback0

  ip address 10.1.1.1 255.255.255.255

  !

  interface Loopback2

  ip address 11.11.11.1 255.255.255.0

  !

  interface Serial8/0

  ip address 192.168.10.1 255.255.255.252

  

  !--- The interface is connected to PE 1.

  

  !

  ip classless

  ip route 0.0.0.0 0.0.0.0 192.168.10.2

  

  !--- This is the default route to route all packets to PE 1.

  

  !

  

  PE 1

  version 12.2

  !

  hostname PE-1

  !

  ip subnet-zero

  !

  ip vrf customer1

  

  !--- This configured VRF customer1.

  

  rd 100:1

  

  !--- This configured the route distiguisher for VRF.

  

  route-target export 1:1

  route-target import 1:1

  

  !--- This configured the export and import policies into VRF.

  

  !

  ip cef

  

  !--- This enabled Cisco Express Forwarding (CEF) switching.

  

  !

  interface Loopback0

  ip address 10.1.1.2 255.255.255.255

  !

  interface Ethernet0/0

  

  !--- It is connected to P router.

  

  ip address 10.10.23.2 255.255.255.0

  tag-switching ip

  

  !--- MPLS switching is enabled.

  

  !

  interface Serial8/0

  ! Connected to CE-1

  ip vrf forwarding customer1

  

  !--- Route forwarding based on customer1 VRF is enabled.

  

  ip address 192.168.10.2 255.255.255.252

  !

  router ospf 1

  log-adjacency-changes

  redistribute static subnets

  network 0.0.0.0 255.255.255.255 area 0

  !

  router bgp 100

  no synchronization

  bgp log-neighbor-changes

  neighbor 10.1.1.4 remote-as 100

  

  !--- Neighbor relationship with PE 2 is established.

  

  neighbor 10.1.1.4 update-source Loopback0

  neighbor 10.1.1.4 next-hop-self

  no auto-summary

  !

  address-family ipv4 vrf customer1

  

  !--- The address-family configuration mode specifies IPv4 unicast

  !---address prefixes for customer1 VRF.

  

  no auto-summary

  no synchronization

  network 11.11.11.0 mask 255.255.255.0

  

  !--- CE 1 network 11.11.11.0/24 to PE 2 is announced.

  

  network 192.168.10.0 mask 255.255.255.252

  exit-address-family

  !

  address-family vpnv4

  

  !--- This is the address-family VPNV4 configuration mode for

  !--- configuring BGP sessions.

  

  neighbor 10.1.1.4 activate

  neighbor 10.1.1.4 send-community extended

  no auto-summary

  exit-address-family

  !

  ip classless

  ip route 11.11.11.0 255.255.255.0 Serial8/0 192.168.10.1

  

  !--- The static route in the global routing table is pointing to

  !--- the interface connected to CE 1.

  

  ip route vrf customer1 0.0.0.0 0.0.0.0 192.168.67.1 global

  

  !--- The static default route under customer1 VRF, routing packets

  !--- outside of VPN to the Internet gateway.

  

  ! routes

  ip route vrf customer1 11.11.11.0 255.255.255.0 192.168.10.1

  

  !--- The static route for network 11.11.11.0/24 (CE-1 Network) under

  !---customer1 VRF ensures the reachability of CE 1 network from the

  !--- other VPN sites

  

  

  P

  version 12.2

  !

  hostname P

  !

  ip subnet-zero

  !

  ip cef

  

  !--- CEF switching is enabled.

  

  !

  interface Loopback0

  ip address 10.1.1.3 255.255.255.255

  !

  interface Ethernet0/0

  

  !--- This is connected to PE 1.

  

  ip address 10.10.23.3 255.255.255.0

  tag-switching ip

  

  !--- MPLS switching is enabled.

  

  !

  interface Ethernet1/0

  

  !--- This is connected to PE 2.

  

  ip address 10.10.34.3 255.255.255.0

  tag-switching ip

  !

  interface Ethernet2/0

  

  !--- This is connected to the Internet gateway.

  

  ip address 10.10.36.3 255.255.255.0

  tag-switching ip

  !

  router ospf 1

  log-adjacency-changes

  network 0.0.0.0 255.255.255.255 area 0

  

  

  IGW

  version 12.2

  !

  hostname IGW

  !

  ip subnet-zero

  !

  ip cef

  

  !--- This enabled CEF switching.

  

  !

  interface Loopback0

  ip address 10.1.1.6 255.255.255.255

  !

  interface Ethernet2/0

  

  !--- This is connected to P router.

  

  ip address 10.10.36.6 255.255.255.0

  tag-switching ip

  !

  interface Serial8/0

  

  !--- This is connected to Internet R7.

  

  ip address 192.168.67.1 255.255.255.252

  !

  router ospf 1

  log-adjacency-changes

  network 0.0.0.0 255.255.255.255 area 0

  !

  router bgp 100

  no synchronization

  bgp log-neighbor-changes

  network 11.11.11.0 mask 255.255.255.0

  network 22.22.22.0 mask 255.255.255.0

  neighbor 192.168.67.2 remote-as 200

  no auto-summary

  

  PE 2

  version 12.2

  !

  hostname PE-2

  !

  ip subnet-zero

  !

  ip vrf customer1

  

  !--- Customer1 VRF is configured.

  

  rd 100:1

  

  !--- Route Distinguisher for VRF is configured.

  

  route-target export 1:1

  route-target import 1:1

  

  !--- This configured the import and export policies for customer1

  !--- VRF.

  

  !

  ip cef

  

  !--- This enabled CEF switching.

  

  !

  interface Loopback0

  ip address 10.1.1.4 255.255.255.255

  interface Ethernet1/0

  

  !--- Connected to P router.

  

  ip address 10.10.34.4 255.255.255.0

  tag-switching ip

  

  !--- MPLS switching is enabled.

  

  !

  interface Serial9/0

  

  !--- Connected to CE 2 router.

  

  ip vrf forwarding customer1

  

  !--- This enables VRF forwarding on the interface.

  

  ip address 192.168.20.1 255.255.255.252

  !

  router ospf 1

  log-adjacency-changes

  redistribute static subnets

  network 0.0.0.0 255.255.255.255 area 0

  !

  router bgp 100

  no synchronization

  bgp log-neighbor-changes

  neighbor 10.1.1.2 remote-as 100

  neighbor 10.1.1.2 update-source Loopback0

  neighbor 10.1.1.2 next-hop-self

  no auto-summary

  !

  address-family ipv4 vrf customer1

  

  !--- This is the address-family IPv4 configuration of customer1 VRF.

  

  no auto-summary

  no synchronization

  network 22.22.22.0 mask 255.255.255.0

  

  !--- This announces the CE 2 network to PE 1.

  

  exit-address-family

  !

  address-family vpnv4

  

  !--- This is the address-family VPNV4 configuration for BGP Sessions

  !--- with PE 1.

  

  neighbor 10.1.1.2 activate

  neighbor 10.1.1.2 send-community extended

  no auto-summary

  exit-address-family

  !

  ip classless

  !--- This is the static route for network 22.22.22.0/24 in the global

  !--- routing table pointing to the interface connected to CE 2.

        ip route vrf customer1 0.0.0.0 0.0.0.0 192.168.67

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