例圖：

?要求：

????????①R1和R5為同一個公司的區(qū)域，R6和R7為同一個公司的區(qū)域，公司的各個區(qū)域之間互相能訪問，但是公司和公司不能互相訪問

????????②R1與R5使用靜態(tài)

????????③R6使用RIP，R7使用OSPF

思路：

????????需要先在R2-R3-R4內(nèi)部運行IBGP協(xié)議，然后在IBGP協(xié)議的基礎上再去運行BGP協(xié)議，并通過MPLS技術進行IBGP對等體的建鄰與數(shù)據(jù)傳輸。

? ? ? ? 為了保證和區(qū)分不同公司做到跨越公網(wǎng)發(fā)送的信息需要使用MPLS-VPN協(xié)議簇技術，首先需要使用VRF虛擬空間技術將PE受到的來自不同CE的信息進行劃分，然后再通過RD來區(qū)分信息來自于哪個CE，通過ML-BGP跨越公網(wǎng)到達對端的PE，此時需要使用RT來區(qū)分到達的區(qū)域，此時PE1的出RT需要和PE2的入RT相同，然后再將信息發(fā)送到對應的虛擬VRF區(qū)域

? ? ? ? 而為了做到直連，協(xié)議，靜態(tài)在MPLS中進行導入，需要使用雙向重發(fā)布技術

配置：

①R2-R3-R4配置并運行OSPF

//配置公網(wǎng)部分，并允許OSPF [r2]int g0/0/1 [r2-GigabitEthernet0/0/1]ip address 23.0.0.1 30 [r2-GigabitEthernet0/0/1]int l 0 [r2-LoopBack0]ip address 2.2.2.2 24 [r2-LoopBack0]q [r2]ospf 1 router-id 2.2.2.2 [r2-ospf-1]area 0 [r2-ospf-1-area-0.0.0.0]network 23.0.0.0 0.0.0.255 [r2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.255[r3]int g0/0/0 [r3-GigabitEthernet0/0/0]ip address 23.0.0.2 30 [r3-GigabitEthernet0/0/0]int g0/0/1 [r3-GigabitEthernet0/0/1]ip address 34.0.0.1 30 [r3-GigabitEthernet0/0/1]int l 0 [r3-LoopBack0]ip address 3.3.3.3 24 [r3-LoopBack0]q [r3]ospf 1 router-id 3.3.3.3 [r3-ospf-1]area 0 [r3-ospf-1-area-0.0.0.0]network 23.0.0.0 0.0.0.255 [r3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.255 [r3-ospf-1-area-0.0.0.0]network 34.0.0.0 0.0.0.255[r4]int g0/0/0 [r4-GigabitEthernet0/0/0]ip address 34.0.0.2 30 [r4-GigabitEthernet0/0/0]int l 0 [r4-LoopBack0]ip address 4.4.4.4 24 [r4-LoopBack0]q [r4]ospf 1 router-id 4.4.4.4 [r4-ospf-1]area 0 [r4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.255 [r4-ospf-1-area-0.0.0.0]network 34.0.0.0 0.0.0.255#檢查，查看R2的ospf路由信息 [r2]display ip routing-table protocol ospf Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ Public routing table : OSPFDestinations : 3 Routes : 3 OSPF routing table status : <Active>Destinations : 3 Routes : 3Destination/Mask Proto Pre Cost Flags NextHop Interface3.3.3.3/32 OSPF 10 1 D 23.0.0.2 GigabitEthernet 0/0/14.4.4.4/32 OSPF 10 2 D 23.0.0.2 GigabitEthernet 0/0/134.0.0.0/30 OSPF 10 2 D 23.0.0.2 GigabitEthernet 0/0/1OSPF routing table status : <Inactive>Destinations : 0 Routes : 0

②運行BGP和MPLS LDP協(xié)議

//運行BGP協(xié)議 [r2]bgp 1 [r2-bgp]router-id 2.2.2.2 [r2-bgp]peer 4.4.4.4 as-number 1 [r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0 [r2-bgp]peer 4.4.4.4 next-hop-local [r4]bgp 1 [r4-bgp]router-id 4.4.4.4 [r4-bgp]peer 2.2.2.2 as-number 1 [r4-bgp]peer 2.2.2.2 connect-interface LoopBack 0 [r4-bgp]peer 2.2.2.2 next-hop-local//檢查BGP的peer表 [r2]display bgp peer BGP local router ID : 2.2.2.2Local AS number : 1Total number of peers : 1 Peers in established state : 1Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv4.4.4.4 4 1 2 3 0 00:00:48 Established 0//R2-R3-R4運行MPLS協(xié)議 [r2]mpls lsr-id 2.2.2.2 [r2]mpls Info: Mpls starting, please wait... OK! [r2-mpls]q [r2]mpls ldp [r2-mpls-ldp]q [r2]int g0/0/1 [r2-GigabitEthernet0/0/1]mpls [r2-GigabitEthernet0/0/1]mpls ldp [r3]mpls lsr-id 3.3.3.3 [r3]mpl [r3]mpls Info: Mpls starting, please wait... OK! [r3-mpls]q [r3]mpls [r3]mpls ld [r3]mpls ldp [r3-mpls-ldp]q [r3]int g0/0/0 [r3-GigabitEthernet0/0/0]mpls [r3-GigabitEthernet0/0/0]mpls ldp [r3-GigabitEthernet0/0/0]int g0/0/1 [r3-GigabitEthernet0/0/1]mpls [r3-GigabitEthernet0/0/1]mpls ldp [r4]mpls lsr-id 4.4.4.4 [r4]mpls Info: Mpls starting, please wait... OK! [r4-mpls]q [r4-mpls]mpls ldp [r4-mpls-ldp]q [r4]int g0/0/0 [r4-GigabitEthernet0/0/0]mpls [r4-GigabitEthernet0/0/0]mpls ldp [r4-GigabitEthernet0/0/0]q//檢查MPLS LDP的鄰居表 [r2]display mpls ldp peer LDP Peer Information in Public networkA '*' before a peer means the peer is being deleted.------------------------------------------------------------------------------PeerID TransportAddress DiscoverySource------------------------------------------------------------------------------3.3.3.3:0 3.3.3.3 GigabitEthernet0/0/1------------------------------------------------------------------------------TOTAL: 1 Peer(s) Found.

③配置虛擬VRF

//R1的虛擬空間lxb --- RD為1:5，出RT為1:5，入RT為5:1 [r2]ip vpn-instance lxb [r2-vpn-instance-lxb]route-distinguisher 1:5 [r2-vpn-instance-lxb-af-ipv4]vpn-target 1:5 export-extcommunity EVT Assignment result: Info: VPN-Target assignment is successful. [r2-vpn-instance-lxb-af-ipv4]vpn-target 5:1 import-extcommunity IVT Assignment result: Info: VPN-Target assignment is successful.//R6的虛擬空間lsp --- RD為6:7，出RT為6:7，入RT為7:6 [r2]ip vpn-instance lsp [r2-vpn-instance-lsp]route-distinguisher 6:7 [r2-vpn-instance-lsp-af-ipv4]vpn-target 6:7 export-extcommunity EVT Assignment result: Info: VPN-Target assignment is successful. [r2-vpn-instance-lsp-af-ipv4]vpn-target 7:6 import-extcommunity IVT Assignment result: Info: VPN-Target assignment is successful.//R5的虛擬空間lxb --- RD為5:1，出RT為5:1，入RT為1：5 [r4]ip vpn-instance lxb [r4-vpn-instance-lxb]route-distinguisher 5:1 [r4-vpn-instance-lxb-af-ipv4]vpn-target 5:1 export-extcommunity EVT Assignment result: Info: VPN-Target assignment is successful. [r4-vpn-instance-lxb-af-ipv4]vpn-target 1:5 import-extcommunity IVT Assignment result: Info: VPN-Target assignment is successful.//R7的虛擬空間xsb --- RD為7:6，出RT為7:6，入RT為6:7 [r4]ip vpn-instance xsb [r4-vpn-instance-xsb]route-distinguisher 7:6 [r4-vpn-instance-xsb-af-ipv4]vpn-target 7:6 export-extcommunity EVT Assignment result: Info: VPN-Target assignment is successful. [r4-vpn-instance-xsb-af-ipv4]vpn-target 6:7 import-extcommunity IVT Assignment result: Info: VPN-Target assignment is successful.

④接口綁定（將物理端口綁定到虛擬空間內(nèi)）

[r2]int g0/0/0 [r2-GigabitEthernet0/0/0]ip binding vpn-instance lxb Info: All IPv4 related configurations on this interface are removed! Info: All IPv6 related configurations on this interface are removed! [r2-GigabitEthernet0/0/0]ip address 192.168.12.2 30[r2]int g0/0/2 [r2-GigabitEthernet0/0/2]ip binding vpn-instance lsp Info: All IPv4 related configurations on this interface are removed! Info: All IPv6 related configurations on this interface are removed! [r2-GigabitEthernet0/0/2]ip address 192.168.26.2 30[r4]int g0/0/1 [r4-GigabitEthernet0/0/1]ip binding vpn-instance lxb Info: All IPv4 related configurations on this interface are removed! Info: All IPv6 related configurations on this interface are removed! [r4-GigabitEthernet0/0/1]ip address 192.168.45.1 30[r4]int g0/0/2 [r4-GigabitEthernet0/0/2]ip binding vpn-instance xsb Info: All IPv4 related configurations on this interface are removed! Info: All IPv6 related configurations on this interface are removed! [r4-GigabitEthernet0/0/2]ip address 192.168.47.1 30

⑤配置R6與R7的協(xié)議

//R6的配置 [r6]int g0/0/0 [r6-GigabitEthernet0/0/0]ip address 192.168.26.1 30 [r6-GigabitEthernet0/0/0]int l 0 [r6-LoopBack0]ip address 192.168.6.1 24[r6]rip 1 [r6-rip-1]version 2 [r6-rip-1]network 192.168.6.0 [r6-rip-1]network 192.168.26.0//R2上虛擬RIP的配置 [r2]rip 1 vpn-instance lsp [r2-rip-1]v 2 [r2-rip-1]network 192.168.26.0//刷新R2的虛擬RIP表 [r2-rip-1]display ip routing-table vpn-instance lsp protocol rip Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ lsp routing table : RIPDestinations : 1 Routes : 1 RIP routing table status : <Active>Destinations : 1 Routes : 1Destination/Mask Proto Pre Cost Flags NextHop Interface192.168.6.0/24 RIP 100 1 D 192.168.26.1 GigabitEthernet 0/0/2RIP routing table status : <Inactive>Destinations : 0 Routes : 0//R4的虛擬OSPF配置 [r4]ospf 2 vpn-instance xsb router-id 4.4.4.4 [r4-ospf-2]area 0 [r4-ospf-2-area-0.0.0.0]network 192.168.47.0 0.0.0.255//R7上對應的配置 [r7]int g0/0/0 [r7-GigabitEthernet0/0/0]ip address 192.168.47.2 30 [r7-GigabitEthernet0/0/0]q [r7]int l 0 [r7-LoopBack0]ip address 192.168.7.1 24 [r7]ospf 1 router-id 7.7.7.7 [r7-ospf-1]area 0 [r7-ospf-1-area-0.0.0.0]ne [r7-ospf-1-area-0.0.0.0]network 192.168.47.0 0.0.0.255 [r7-ospf-1-area-0.0.0.0]network 192.168.7.0 0.0.0.255//此時去R4上打開虛擬的ospf表 [r4]display ip routing-table vpn-instance xsb protocol ospf Route Flags: R - relay, D - download to fib ------------------------------------------------------------------------------ xsb routing table : OSPFDestinations : 1 Routes : 1 OSPF routing table status : <Active>Destinations : 1 Routes : 1Destination/Mask Proto Pre Cost Flags NextHop Interface192.168.7.1/32 OSPF 10 1 D 192.168.47.2 GigabitEthernet 0/0/2OSPF routing table status : <Inactive>Destinations : 0 Routes : 0

⑥配置MP-BGP（R6與R7）

//R2上配置IPV4-family [r2]bgp 1 [r2-bgp]ipv4-family vpnv4 [r2-bgp-af-vpnv4]peer 4.4.4.4 enable //VRF lsp的BGP內(nèi)重發(fā)布RIP [r2-bgp]ipv4-family vpn-instance lsp [r2-bgp-lsp]import-route rip 1//RIP重發(fā)布BGP [r2]rip 1 vpn-instance lsp [r2-rip-1]import-route bgp //R4上配置IPV4-family [r4]bgp 1 [r4-bgp]ipv4-family vpnv4 [r4-bgp-af-vpnv4]peer 2.2.2.2 enable [r4-bgp-af-vpnv4]q//VRF xsb的BGP內(nèi)重發(fā)步OSPF [r4-bgp]ipv4-family vpn-instance xsb [r4-bgp-xsb]import-route ospf 2//OSPF重發(fā)布BGP [r4]ospf 2 vpn-instance xsb [r4-ospf-2]import-route bgp //測試 <r6>ping -a 192.168.6.1 192.168.7.1PING 192.168.7.1: 56 data bytes, press CTRL_C to breakReply from 192.168.7.1: bytes=56 Sequence=1 ttl=252 time=40 msReply from 192.168.7.1: bytes=56 Sequence=2 ttl=252 time=30 msReply from 192.168.7.1: bytes=56 Sequence=3 ttl=252 time=30 msReply from 192.168.7.1: bytes=56 Sequence=4 ttl=252 time=40 msReply from 192.168.7.1: bytes=56 Sequence=5 ttl=252 time=30 ms--- 192.168.7.1 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 30/34/40 ms<r7>ping -a 192.168.7.1 192.168.6.1PING 192.168.6.1: 56 data bytes, press CTRL_C to breakReply from 192.168.6.1: bytes=56 Sequence=1 ttl=252 time=60 msReply from 192.168.6.1: bytes=56 Sequence=2 ttl=252 time=40 msReply from 192.168.6.1: bytes=56 Sequence=3 ttl=252 time=50 msReply from 192.168.6.1: bytes=56 Sequence=4 ttl=252 time=50 msReply from 192.168.6.1: bytes=56 Sequence=5 ttl=252 time=40 ms--- 192.168.6.1 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 40/48/60 ms

⑦配置R1與R5的直連

[r1]int g0/0/0 [r1-GigabitEthernet0/0/0]ip ad [r1-GigabitEthernet0/0/0]ip address 192.168.12.1 30 [r1]int l 0 [r1-LoopBack0]ip address 192.168.1.1 24//R1上寫入到達R5的靜態(tài) [r1]ip route-static 192.168.5.0 24 192.168.12.2 [r1]ip route-static 192.168.45.0 24 192.168.12.2[r2]bgp 1 [r2-bgp]ipv4-family vpn-instance lxb [r2-bgp-lxb]import-route direct [r2-bgp-lxb]import-route static //R2寫下到達R1的靜態(tài) [r2]ip route-static vpn-instance lxb 192.168.1.0 24 192.168.12.1 [r4]bgp 1 [r4-bgp]ipv4-family vpn-instance lxb [r4-bgp-lxb]import-route direct [r4-bgp-lxb]import-route static //R4寫下R4到達R5的靜態(tài) [r4]ip route-static vpn-instance lxb 192.168.5.0 24 192.168.45.2 [r5]interface g0/0/0 [r5-GigabitEthernet0/0/0]ip address 192.168.45.2 30 [r5-GigabitEthernet0/0/0]int l 0 [r5-LoopBack0]ip address 192.168.5.1 24//R1上寫入到達R5的靜態(tài) [r5]ip route-static 192.168.1.0 24 192.168.45.1 [r5]ip route-static 192.168.12.0 24 192.168.45.1//測試 [r2]ping -vpn-instance lxb 192.168.5.1PING 192.168.5.1: 56 data bytes, press CTRL_C to breakRequest time outReply from 192.168.5.1: bytes=56 Sequence=2 ttl=253 time=80 msReply from 192.168.5.1: bytes=56 Sequence=3 ttl=253 time=30 msReply from 192.168.5.1: bytes=56 Sequence=4 ttl=253 time=30 msReply from 192.168.5.1: bytes=56 Sequence=5 ttl=253 time=30 ms--- 192.168.5.1 ping statistics ---5 packet(s) transmitted4 packet(s) received20.00% packet lossround-trip min/avg/max = 30/42/80 ms[r4]ping -vpn-instance lxb 192.168.1.1PING 192.168.1.1: 56 data bytes, press CTRL_C to breakReply from 192.168.1.1: bytes=56 Sequence=1 ttl=253 time=40 msReply from 192.168.1.1: bytes=56 Sequence=2 ttl=253 time=40 msReply from 192.168.1.1: bytes=56 Sequence=3 ttl=253 time=30 msReply from 192.168.1.1: bytes=56 Sequence=4 ttl=253 time=40 msReply from 192.168.1.1: bytes=56 Sequence=5 ttl=253 time=40 ms--- 192.168.1.1 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 30/38/40 ms[r1]ping -a 192.168.1.1 192.168.5.1PING 192.168.5.1: 56 data bytes, press CTRL_C to breakReply from 192.168.5.1: bytes=56 Sequence=1 ttl=252 time=130 msReply from 192.168.5.1: bytes=56 Sequence=2 ttl=252 time=40 msReply from 192.168.5.1: bytes=56 Sequence=3 ttl=252 time=50 msReply from 192.168.5.1: bytes=56 Sequence=4 ttl=252 time=30 msReply from 192.168.5.1: bytes=56 Sequence=5 ttl=252 time=40 ms--- 192.168.5.1 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 30/58/130 ms[r5]ping -a 192.168.5.1 192.168.1.1PING 192.168.1.1: 56 data bytes, press CTRL_C to breakReply from 192.168.1.1: bytes=56 Sequence=1 ttl=252 time=50 msReply from 192.168.1.1: bytes=56 Sequence=2 ttl=252 time=40 msReply from 192.168.1.1: bytes=56 Sequence=3 ttl=252 time=50 msReply from 192.168.1.1: bytes=56 Sequence=4 ttl=252 time=50 msReply from 192.168.1.1: bytes=56 Sequence=5 ttl=252 time=50 ms--- 192.168.1.1 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 40/48/50 ms

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