全球路由表应用举例

文章出处:Linux 宝库 作者:linux宝库 发布时间:2007-03-12

  
  
  CE 1
  version 12.2
  !
  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
  ip route 22.22.22.0 255.255.255.0 Serial9/0 192.168.20.2
  
  !--- 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