Requirements 1. Users of different SITs within a VPNA can communicate with each other. 2. VPNB users of different SITE can communicate witheach other. 3. Users between VPNA and VPNB VPNs cannot communicatewith each other. Topology ![]() (1) Configure the interface Internet Protocol Address and OSPF routing protocol on each node of the MPLS backbone network torealize the intercommunication between the nodes of the backbone network. #Configuration of device PE1. PE1 > enable PE1 #configure terminal PE1 (config) #interface loopback 0 PE1 (config-if-Loopback 0) #ip address 172.168.0.1255.255.255.255 PE1 (config-if-Loopback 0) #exit PE1 (config) #interface gigabitethernet 0/2 PE1 (config-if-GigabitEthernet 0/2) #no switchport PE1 (config-if-GigabitEthernet 0/2) #ip address172.168.10.1 255.255.255.0 PE1 (config-if-GigabitEthernet 0/2) #exit PE1 (config) #router ospf 10 PE1 (config-router) #network 172.168.0.1 0.0.0 area0 PE1 (config-router) #network 172.168.10.0 0.0.0.255 area 0 PE1 (config-router) #exit #Configuration of device P1. P1 > enable P1 #configure terminal P1 (config) #interface loopback 0 P1 (config-if-Loopback 0) #ip address 172.168.0.4255.255.255.255 P1 (config-if-Loopback 0) #exit P1 (config) #interface gigabitethernet 0/1 P1 (config-if-GigabitEthernet 0/1) #no switchport P1 (config-if-GigabitEthernet 0/1) #ip address172.168.10.2 255.255.255.0 P1 (config-if-GigabitEthernet 0/1) #exit P1 (config) #interface gigabitethernet 0/2 P1 (config-if-GigabitEthernet 0/2) #no switchport P1 (config-if-GigabitEthernet 0/2) #ip address172.168.20.1 255.255.255.0 P1 (config-if-GigabitEthernet 0/2) #exit P1 (config) #router ospf 10 P1 (config-router) #network 172.168.0.4 0.0.0 area0 P1 (config-router) #network 172.168.10.0 0.0.0 area0 P1 (config-router) #network 172.168.20.0 0.0.0 area0 P1 (config-router) #exit #Configuration of device P2. P2 > enabled P2 #configure terminal P2 (config) #interface loopback 0 P2 (config-if-Loopback 0) #ip address 172.168.0.5255.255.255.255 P2 (config-if-Loopback 0) #exit P2 (config) #interface gigabitethernet 0/1 P2 (config-if-GigabitEthernet 0/1) #no switchport P2 (config-if-GigabitEthernet 0/1) #ip address172.168.20.2 255.255.255.0 P2 (config-if-GigabitEthernet 0/1) #exit P2 (config) #interface gigabitethernet 0/2 P2 (config-if-GigabitEthernet 0/2) #no switchport P2 (config-if-GigabitEthernet 0/2) #ip address 172.168.30.1255.255.255.0 P2 (config-if-GigabitEthernet 0/2) #exit P2 (config) #interface gigabitethernet 0/3 P2 (config-if-GigabitEthernet 0/3) #no switchport P2 (config-if-GigabitEthernet 0/3) #ip address172.168.40.1 255.255.255.0 P2 (config-if-GigabitEthernet 0/3) #exit P2 (config) #router ospf 10 P2 (config-router) #network 172.168.0.5 0.0.0.0area 0 P2 (config-router) #network 172.168.20.0 0.0.0 area0 P2 (config-router) #network 172.168.30.0 0.0.0 area0 P2 (config-router) #network 172.168.40.0 0.0.0 area0 P2 (config-router) #exit #Configuration of device PE2. PE2 > enabled PE2 #configure terminal PE2 (config) #interface loopback 0 PE2 (config-if-Loopback 0) #ip address 172.168.0.3255.255.255.255 PE2 (config-if-Loopback 0) #exit PE2 (config) #interface gigabitethernet 0/2 PE2 (config-if-GigabitEthernet 0/2) #no switchport PE2 (config-if-GigabitEthernet 0/2) #ip address172.168.40.2 255.255.255.0 PE2 (config-if-GigabitEthernet 0/2) #exit PE2 (config) #router ospf 10 PE2 (config-router) #network 172.168.0.3 0.0.0.0area 0 PE2 (config-router) #network 172.168.40.0 0.0.0.255area 0 PE2 (config-router) #exit #Configuration of device PE3. PE3 > enable PE3 #configure terminal PE3 (config) #interface loopback 0 PE3 (config-if-Loopback 0) #ip address 172.168.0.2255.255.255.255 PE3 (config-if-Loopback 0) #exit PE3 (config) #interface gigabitethernet 0/2 PE3 (config-if-GigabitEthernet 0/2) #no switchport PE3 (config-if-GigabitEthernet 0/2) #ip address172.168.30.2 255.255.255.0 PE3 (config-if-GigabitEthernet 0/2) #exit PE3 (config) #router ospf 10 PE3 (config-router) #network 172.168.0.2 0.0.0.0area 0 PE3 (config-router) #network 172.168.30.0 0.0.0.255area 0 PE3 (config-router) #exit (2) Configure the MPLS forwarding capability andLDP protocol on each node of the MPLS backbone network to estaxlish an LDP LSP. #Configuration of device PE1 PE1 (config) #mpls ip PE1 (config) #mpls router ldp PE1 (config-mpls-router) #ldp router-id interfaceloopback 0 force PE1 (config-mpls-router) #exit PE1 (config) #interface gigabitethernet 0/2 PE1 (config-if-GigabitEthernet 0/2)#label-switching PE1 (config-if-GigabitEthernet 0/2) #mpls ip PE1 (config-if-GigabitEthernet 0/2) #exit #Configuration of device P1. P1 (config) #mpls ip P1 (config) #mpls router ldp P1 (config-mpls-router) #ldp router-id interfaceloopback 0 force P1 (config-mpls-router) #exit P1 (config) #interface gigabitethernet 0/1 P1 (config-if-GigabitEthernet 0/1) #label-switching P1 (config-if-GigabitEthernet 0/1) #mpls ip P1 (config-if-GigabitEthernet 0/1) #exit P1 (config) #interface gigabitethernet 0/2 P1 (config-if-GigabitEthernet 0/2) #label-switching P1 (config-if-GigabitEthernet 0/2) #mpls ip P1 (config-if-GigabitEthernet 0/2) #exit #Configuration of device P2. P2(config)# mpls ip P2(config)# mpls router ldp P2(config-mpls-router)# ldp router-id interfaceloopback 0 force P2(config-mpls-router)# exit P2(config)# interface gigabitethernet 0/1 P2(config-if-GigabitEthernet 0/1)# label-switching P2(config-if-GigabitEthernet 0/1)# mpls ip P2(config-if-GigabitEthernet 0/1)# exit P2(config)# interface gigabitethernet 0/2 P2(config-if-GigabitEthernet 0/2)# label-switching P2(config-if-GigabitEthernet 0/2)# mpls ip P2(config-if-GigabitEthernet 0/2)# exit P2(config)# interface gigabitethernet 0/3 P2(config-if-GigabitEthernet 0/3)# label-switching P2(config-if-GigabitEthernet 0/3)# mpls ip P2(config-if-GigabitEthernet 0/3)# exit #Configuration of device PE2 PE2(config)# mpls ip PE2(config)# mpls router ldp PE2(config-mpls-router)# ldp router-id interfaceloopback 0 force PE2(config-mpls-router)# exit PE2(config)# interface gigabitethernet 0/2 PE2(config-if-GigabitEthernet 0/2)# label-switching PE2(config-if-GigabitEthernet 0/2)# mpls ip PE2(config-if-GigabitEthernet 0/2)# exit #Configuration of device PE3 PE3(config)# mpls ip PE3(config)# mpls router ldp PE3(config-mpls-router)# ldp router-id interfaceloopback 0 force PE3(config-mpls-router)# exit PE3(config)# interface gigabitethernet 0/2 PE3(config-if-GigabitEthernet 0/2)# label-switching PE3(config-if-GigabitEthernet 0/2)# mpls ip PE3(config-if-GigabitEthernet 0/2)# exit (3) Configure VPN routing instances on each PE,define RD values and RTS values, and associate VRF with corresponding interfaces #Configuration of device PE1. PE1 (config) #ip vrf VPNA PE1 (config-vrf) #rd 1:100 PE1 (config-vrf) #route-target both 1:100 PE1 (config-vrf) #exit PE1 (config) #interface gigabitethernet 0/1 PE1 (config-if-GigabitEthernet 0/1) #no switchport PE1 (config-if-GigabitEthernet 0/1) #ip vrfforwarding VPNA PE1 (config-if-GigabitEthernet 0/1) #ip address192.168.10.1 255.255.255.0 PE1 (config-if-GigabitEthernet 0/1) #exit #Configuration of device PE2. PE2 (config) #ip vrf VPNA PE2 (config-vrf) #rd 1:100 PE2 (config-vrf) #route-target both 1:100 PE2 (config-vrf) #exit PE2 (config) #ip vrf VPNB PE2 (config-vrf) #rd 1:200 PE2 (config-vrf) #route-target both 1:200 PE2 (config-vrf) #exit PE2 (config) #interface gigabitethernet 0/1 PE2 (config-if-GigabitEthernet 0/1) #no switchport PE2 (config-if-GigabitEthernet 0/1) #ip vrfforwarding VPNA PE2 (config-if-GigabitEthernet 0/1) #ip address192.168.40.1 255.255.255.0 PE2 (config-if-GigabitEthernet 0/1) #exit PE2 (config) #interface gigabitethernet 0/3 PE2 (config-if-GigabitEthernet 0/3) #no switchport PE2 (config-if-GigabitEthernet 0/3) #ip vrfforwarding VPNB PE2 (config-if-GigabitEthernet 0/3) #ip address192.168.30.1 255.255.255.0 PE2 (config-if-GigabitEthernet 0/3) #exit #Configuration of device PE3. PE3 (config) #ip vrf VPNA PE3 (config-vrf) #rd 1:100 PE3 (config-vrf) #route-target both 1:100 PE3 (config-vrf) #exit PE3 (config) #ip vrf VPNB PE3 (config-vrf) #rd 1:200 PE3 (config-vrf) #route-target both 1:200 PE3 (config-vrf) #exit PE3 (config) #interface gigabitethernet 0/1 PE3 (config-if-GigabitEthernet 0/1) #no switchport PE3 (config-if-GigabitEthernet 0/1) #ip vrfforwarding VPNB PE3 (config-if-GigabitEthernet 0/1) #ip address192.168.10.1 255.255.255.0 PE3 (config-if-GigabitEthernet 0/1) #exit PE3 (config) #interface gigabitethernet 0/3 PE3 (config-if-GigabitEthernet 0/3) #no switchport PE3 (config-if-GigabitEthernet 0/3) #ip vrfforwarding VPNA PE3 (config-if-GigabitEthernet 0/3) #ip address192.168.20.1 255.255.255.0 PE3 (config-if-GigabitEthernet 0/3) #exit (4) Configure MP-IBGP neighbors between the PEs totransmit VPN routing information. #Configuration of device PE1. PE1 (config) #router bgp 1 PE1 (config-router) #neighbor 172.168.0.2 remote-as1 PE1 (config-router) #neighbor 172.168.0.2update-source loopback 0 PE1 (config-router) #neighbor 172.168.0.3 remote-as1 PE1 (config-router) #neighbor 172.168.0.3update-source loopback 0 PE1 (config-router) #addresses-family vpnv4 PE1 (config-router-af) #neighbor 172.168.0.2activate PE1 (config-router-af) #neighbor 172.168.0.3activate PE1 (config-router-af) #exit-addresses-family PE1 (config-router) #exit #Configuration of device PE2. PE2 (config) #router bgp 1 PE2 (config-router) #neighbor 172.168.0.1 remote-as1 PE2 (config-router) #neighbor 172.168.0.1update-source loopback 0 PE2 (config-router) #neighbor 172.168.0.2 remote-as1 PE2 (config-router) #neighbor 172.168.0.2update-source loopback 0 PE2 (config-router) #addresses-family vpnv4 PE2 (config-router-af) #neighbor 172.168.0.1activate PE2 (config-router-af) #neighbor 172.168.0.2activate PE2 (config-router-af) #exit-addresses-family PE2 (config-router) #exit #Configuration of device PE3. PE3 (config) #router bgp 1 PE3 (config-router) #neighbor 172.168.0.1 remote-as1 PE3 (config-router) #neighbor 172.168.0.1update-source loopback 0 PE3 (config-router) #neighbor 172.168.0.3 remote-as1 PE3 (config-router) #neighbor 172.168.0.3update-source loopback 0 PE3 (config-router) #addresses-family vpnv4 PE3 (config-router-af) #neighbor 172.168.0.1activate PE3 (config-router-af) #neighbor 172.168.0.3activate PE3 (config-router-af) #exit-addresses-family PE3 (config-router) #exit (5) configure EBGP between each PE and VPN-SITE to transmit VPN routing information. #Configuration of device PE1. PE1 (config) #router bgp 1 PE1 (config-router) #addresses-family ipv4 vrf VPNA PE1 (config-router-af) #neighbor 192.168.10.2remote-as 65001 PE1 (config-router-af) #neighbor 192.168.10.2activate PE1 (config-router-af) #exit-addresses-family PE1 (config-router) #end #Configuration of device PE2. PE2 (config) #router bgp 1 PE2 (config-router) #addresses-family ipv4 vrf VPNA PE2 (config-router-af) #neighbor 192.168.40.2remote-as 65003 PE2 (config-router-af) #neighbor 192.168.40.2activate PE2 (config-router-af) #exit-addresses-family PE2 (config-router) #addresses-family ipv4 vrf VPNB PE2 (config-router-af) #neighbor 192.168.30.2remote-as 65005 PE2 (config-router-af) #neighbor 192.168.30.2activate PE2 (config-router-af) #exit-addresses-family PE2 (config-router) #end #Device VPNA-SITEA configuration. VPNA-SITEA > enable VPNA-SITEA #configure terminal VPNA-SITEA (config) #interface gigabitethernet 0/1 VPNA-SITEA (config-if-GigabitEthernet 0/1) #noswitchport VPNA-SITEA (config-if-GigabitEthernet 0/1) ipaddress 192.168.10.2 255.255.255.0 VPNA-SITEA (config-if-GigabitEthernet 0/1) exit VPNA-SITEA (config) #router bgp 65001 VPNA-SITEA (config-router) #neighbor 192.168.10.1remote-as 1 VPNA-SITEA (config-router) #neighbor 192.168.10.1activated VPNA-SITEA (config-router) #end #Device VPNA-SITEB configuration. VPNA-SITEB > enable VPNA-SITEB #configure terminal VPNA-SITEB (config) #interface gigabitethernet 0/1 VPNA-SITEB (config-if-GigabitEthernet 0/1) #noswitchport VPNA-SITEB (config-if-GigabitEthernet 0/1) ipaddress 192.168.20.2 255.255.255.0 VPNA-SITEB (config-if-GigabitEthernet 0/1) exit VPNA-SITEB (config) #router bgp 65002 VPNA-SITEB (config-router) #neighbor 192.168.20.1remote-as 1 VPNA-SITEB (config-router) #neighbor 192.168.20.1activate VPNA-SITEB (config-router) #end #Device VPNA-SITEC configuration. VPNA-SITEC > enable VPNA-SITEC #configure terminal VPNA-SITEC (config) #interface gigabitethernet 0/1 VPNA-SITEC (config-if-GigabitEthernet 0/1) #noswitchport VPNA-SITEC (config-if-GigabitEthernet 0/1) ipaddress 192.168.40.2 255.255.255.0 VPNA-SITEC (config-if-GigabitEthernet 0/1) exit VPNA-SITEC (config) #router bgp 65003 VPNA-SITEC (config-router) #neighbor 192.168.40.1remote-as 1 VPNA-SITEC (config-router) #neighbor 192.168.40.1activate VPNA-SITEC (config-router) #end #Device VPNB-SITEB configuration. VPNB-SITEB > enable VPNB-SITEB #configure terminal VPNB-SITEB (config) #interface gigabitethernet 0/1 VPNB-SITEB (config-if-GigabitEthernet 0/1) #noswitchport VPNB-SITEB (config-if-GigabitEthernet 0/1) #ipaddress 192.168.10.3 255.255.255.0 VPNB-SITEB (config-if-GigabitEthernet 0/1) #exit VPNB-SITEB (config) #router bgp 65004 VPNB-SITEB (config-router) #neighbor 192.168.10.1remote-as 1 VPNB-SITEB (config-router) #neighbor 192.168.10.1activate VPNB-SITEB (config-router) #end #Device VPNB-SITEC configuration. VPNB-SITEC > enable VPNB-SITEC #configure terminal VPNB-SITEC (config) #interface gigabitethernet 0/1 VPNB-SITEC (config-if-GigabitEthernet 0/1) #noswitchport VPNB-SITEC (config-if-GigabitEthernet 0/1) ipaddress 192.168.30.2 255.255.255.0 VPNB-SITEC (config-if-GigabitEthernet 0/1) exit VPNB-SITEC (config) #router bgp 65005 VPNB-SITEC (config-router) #neighbor 192.168.30.1remote-as 1 VPNB-SITEC (config-router) #neighbor 192.168.30.1activate VPNB-SITEC (config-router) #end |
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