本文主要是介绍配置MPLS基本组网-MCE，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1.实验环境：
某公司需要通过mpls vpn实现总部和分部的互访，并且要实现不同部门之间的业务隔离，为了节省开支，总公司使用MCE设备接入不同的部门。要求分公司A只能访问总公司的部门A，分公司B只能访问总公司的部门B。
（1）CE1和CE3为分公司A和分公司B的CE设备；
（2）MCE作为VPN多实例设备接入总公司侧的部门A和部门B；
（3）分公司A和部门A属于vpn实例vpn1、分公司B和部门B属于vpn实例vpn2。
要求相同的vpn实例能够互访，不同的vpn实例不能互访。
2.实验目的：
掌握MCE的应用场景和基本配置
3.实验拓扑：
配置MPLS VPN基本组网-MCE实验拓扑所示。
4.实验步骤：
1）配置接口ip地址，ip规划见表
配置mpls vpn MCE组网实验ip地址规划表
| 设备名称 | 接口编号 | Ip地址 | 所属Vpn实例 |
| PE1 | G0/0/0 | 10.0.11.1/24 | vpn1 |
| PE1 | G0/0/1 | 12.1.1.1/24 | |
| PE1 | G0/0/2 | 10.0.13.1/24 | vpn2 |
| PE1 | Loopback 0 | 1.1.1.1/32 | |
| PE2 | G0/0/0 | 23.1.1.2/24 | |
| PE2 | G0/0/1.10 | 10.0.100.1/24 | vpn1 |
| PE2 | G0/0/1.20 | 10.0.101.1/24 | vpn2 |
| PE2 | Loopback 0 | 3.3.3.3/32 | |
| P | G0/0/0 | 12.1.1.2/24 | |
| P | G0/0/1 | 23.1.1.1/24 | |
| P | Loopback 0 | 2.2.2.2/32 | |
| CE1 | G0/0/0 | 10.0.11.2/24 | |
| CE1 | Loopback 0 | 10.10.10.10/32 | |
| CE2 | G0/0/0 | 10.0.2.2/24 | |
| CE2 | Loopback 0 | 20.20.20.20/32 | |
| CE3 | G0/0/0 | 10.0.13.2/24 | |
| CE3 | Loopback 0 | 30.30.30.30/32 | |
| CE4 | G0/0/0 | 10.0.4.2/24 | |
| CE4 | Loopback 0 | 4.4.4.4/32 | |
| MCE | G0/0/0.10 | 10.0.100.2/24 | vpn1 |
| MCE | G0/0/0.20 | 10.0.101.2/24 | vpn2 |
| MCE | G0/0/1 | 10.0.2.1/24 | vpn1 |
| MCE | G0/0/2 | 10.0.4,1/24 | vpn2 |
2）配置ISP网络的IGP协议
PE1的配置：
[PE1]ospf[PE1-ospf-1]area 0[PE1-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255[PE1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0PE2的配置：
[PE2]ospf[PE2-ospf-1]area 0[PE2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255[PE2-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0P的配置：
[P]ospf[P-ospf-1]area 0[P-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255[P-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0[P-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255查看公网路由的学习情况
[P]display ip routing-table protocol ospfRoute Flags: R - relay, D - download to fib------------------------------------------------------------------------------Public routing table : OSPFDestinations : 2 Routes : 2 OSPF routing table status : <Active>Destinations : 2 Routes : 2Destination/Mask Proto Pre Cost Flags NextHop Interface1.1.1.1/32 OSPF 10 1 D 12.1.1.1 GigabitEthernet0/0/03.3.3.3/32 OSPF 10 1 D 23.1.1.2 GigabitEthernet0/0/1OSPF routing table status : <Inactive>Destinations : 0 Routes : 03）配置ISP内部的mpls及mpls ldp，建立公网的lsp隧道
PE1的配置：
[PE1]mpls lsr-id 1.1.1.1[PE1]mpls[PE1-mpls]q[PE1]mpls ldp[PE1-mpls-ldp]q[PE1]int g0/0/1[PE1-GigabitEthernet0/0/1]mpls[PE1-GigabitEthernet0/0/1]mpls ldpP的配置：
[P]mpls ls[P]mpls lsr-id 2.2.2.2[P]mpls[P-mpls]q[P]mpls ldp[P-mpls-ldp]q[P]interface g0/0/0[P-GigabitEthernet0/0/0]mpls ldp[P-GigabitEthernet0/0/0]q[P]interface g0/0/1[P-GigabitEthernet0/0/1]mpls[P-GigabitEthernet0/0/1]mpls ldpPE2的配置
[PE2]mpls lsr-id 3.3.3.3[PE2]mpls[PE2-mpls]q[PE2]mpls ldp[PE2-mpls-ldp]q[PE2]interface g0/0/0[PE2-GigabitEthernet0/0/0]mpls[PE2-GigabitEthernet0/0/0]mpls ldp查看mpls lsp的建立情况
[PE1]display mpls lsp-------------------------------------------------------------------------------LSP Information: LDP LSP-------------------------------------------------------------------------------FEC In/Out Label In/Out IF Vrf Name 1.1.1.1/32 3/NULL -/- 2.2.2.2/32 NULL/3 -/GE0/0/1 2.2.2.2/32 1024/3 -/GE0/0/1 3.3.3.3/32 NULL/1025 -/GE0/0/1 3.3.3.3/32 1025/1025 -/GE0/0/14）配置vpn实例，并且将接口加入到vpn实例中
PE1的配置：
[PE1]ip vpn-instance vpn1[PE1-vpn-instance-vpn1]route-distinguisher 100:1[PE1-vpn-instance-vpn1-af-ipv4]vpn-target 1:1 both[PE1]interface g0/0/0[PE1-GigabitEthernet0/0/0]ip binding vpn-instance vpn1[PE1-GigabitEthernet0/0/0]ip address 10.0.11.1 24PE1的配置：
[PE1]ip vpn-instance vpn2[PE1-vpn-instance-vpn2]route-distinguisher 200:1[PE1-vpn-instance-vpn2-af-ipv4]vpn-target 2:2 both[PE1]interface g0/0/2[PE1-GigabitEthernet0/0/2]ip binding vpn-instance vpn2 [PE1-GigabitEthernet0/0/2]ip address 10.0.13.1 24PE2的配置：
[PE2]ip vpn-instance vpn1[PE2-vpn-instance-vpn1] route-distinguisher 100:2[PE2-vpn-instance-vpn1-af-ipv4] vpn-target 1:1 both[PE2]interface g0/0/1.10[PE2-GigabitEthernet0/0/1.10]ip binding vpn-instance vpn1[PE2-GigabitEthernet0/0/1.10]ip address 10.0.100.1 24[PE2-GigabitEthernet0/0/1.10]dot1q termination vid 10PE2的配置：
[PE2]ip vpn-instance vpn2[PE2-vpn-instance-vpn2] route-distinguisher 200:2[PE2-vpn-instance-vpn2-af-ipv4] vpn-target 2:2 both[PE2]interface g0/0/1.20[PE2-GigabitEthernet0/0/1.20]ip binding vpn-instance vpn2[PE2-GigabitEthernet0/0/1.20]ip address 10.0.101.1 24[PE2-GigabitEthernet0/0/1.20]dot1q termination vid 20MCE的配置（vpn实例vpn1）：
[MCE]ip vpn-instance vpn1[MCE-vpn-instance-vpn1]route-distinguisher 100:3[MCE-vpn-instance-vpn1-af-ipv4]vpn-target 1:1 both[MCE]interface g0/0/0.10[MCE-GigabitEthernet0/0/0.10]ip binding vpn-instance vpn1[MCE-GigabitEthernet0/0/0.10]dot1q termination vid 10[MCE-GigabitEthernet0/0/0.10]ip address 10.0.100.2 24[MCE]interface g0/0/1[MCE-GigabitEthernet0/0/1]ip binding vpn-instance vpn1[MCE-GigabitEthernet0/0/1]ip address 10.0.2.1 24MCE的配置（vpn实例vpn2）：
[MCE]ip vpn-instance vpn2[MCE-vpn-instance-vpn2]route-distinguisher 200:3[MCE-vpn-instance-vpn2-af-ipv4]vpn-target 2:2 both[MCE]interface g0/0/0.20[MCE-GigabitEthernet0/0/0.20]ip binding vpn-instance vpn2[MCE-GigabitEthernet0/0/0.20]dot1q termination vid 20[MCE-GigabitEthernet0/0/0.20]ip address 10.0.101.2 24[MCE]interface g0/0/2[MCE-GigabitEthernet0/0/2]ip binding vpn-instance vpn2[MCE-GigabitEthernet0/0/2]ip address 10.0.4.1 24注意：由于PE2和MCE要区分两个不同部门的路由，实现业务隔离，因此需要配置两个vpn实例，并且使用子接口的方式，将子接口划分到不同的vpn实例中，实现业务流量和路由层面的隔离。
5）配置PE与CE的路由协议，本案例全部使用ospf
配置公司总部部门A和部门B的ospf协议
PE2的配置：
[PE2]ospf 100 vpn-instance vpn1 [PE2-ospf-100]area 0[PE2-ospf-100-area-0.0.0.0]network 10.0.100.0 0.0.0.255[PE2]ospf 200 vpn-instance vpn2[PE2-ospf-200]area 0[PE2-ospf-200-area-0.0.0.0]network 10.0.101.0 0.0.0.255MCE的配置
[MCE]ospf 100 vpn-instance vpn1[MCE-ospf-100]area 0[MCE-ospf-100-area-0.0.0.0]network 10.0.100.0 0.0.0.255[MCE-ospf-100-area-0.0.0.0]network 10.0.2.0 0.0.0.255[MCE]ospf 200 vpn-instance vpn2[MCE-ospf-200]area 0[MCE-ospf-200-area-0.0.0.0]network 10.0.101.0 0.0.0.255[MCE-ospf-200-area-0.0.0.0]network 10.0.4.0 0.0.0.255CE2的配置
[CE2]ospf 100[CE2-ospf-100]area 0[CE2-ospf-100-area-0.0.0.0]network 10.0.2.0 0.0.0.255[CE2-ospf-100-area-0.0.0.0]network 20.20.20.20 0.0.0.0CE4的配置
[CE4]ospf 200[CE4-ospf-200]area 0 [CE4-ospf-200-area-0.0.0.0]network 10.0.4.0 0.0.0.255[CE4-ospf-200-area-0.0.0.0]network 40.40.40.40 0.0.0.0查看MCE的ospf邻居关系
<MCE>display ospf peer briefOSPF Process 100 with Router ID 10.0.100.2Peer Statistic Information----------------------------------------------------------------------------Area Id Interface Neighbor id State 0.0.0.0 GigabitEthernet0/0/0.10 10.0.100.1 Full 0.0.0.0 GigabitEthernet0/0/1 10.0.2.2 Full ----------------------------------------------------------------------------OSPF Process 200 with Router ID 10.0.101.2Peer Statistic Information----------------------------------------------------------------------------Area Id Interface Neighbor id State 0.0.0.0 GigabitEthernet0/0/0.20 10.0.101.1 Full 0.0.0.0 GigabitEthernet0/0/2 10.0.4.2 Full ----------------------------------------------------------------------------可以看到MCE与PE2以及CE2、CE4建立了ospf的邻居关系
查看MCE的路由表
Vpn实例vpn1的路由表
<MCE>display ip routing-table vpn-instance vpn1Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: vpn1Destinations : 8 Routes : 8 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 Direct 0 0 D 10.0.2.1 GigabitEthernet0/0/110.0.2.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.100.0/24 Direct 0 0 D 10.0.100.2 GigabitEthernet0/0/0.1010.0.100.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1010.0.100.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1020.20.20.20/32 OSPF 10 1 D 10.0.2.2 GigabitEthernet0/0/1255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明能够学习到20.20.20.20/32的路由。
Vpn实例vpn2的路由表
<MCE>display ip routing-table vpn-instance vpn2Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: vpn2Destinations : 8 Routes : 8 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.4.0/24 Direct 0 0 D 10.0.4.1 GigabitEthernet0/0/210.0.4.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/210.0.4.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/210.0.101.0/24 Direct 0 0 D 10.0.101.2 GigabitEthernet0/0/0.2010.0.101.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.2010.0.101.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.2040.40.40.40/32 OSPF 10 1 D 10.0.4.2 GigabitEthernet0/0/2255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明能够学习到40.40.40.40/32的路由。
配置公司分部和PE之间的路由协议
PE1的配置：
[PE1]ospf 100 vpn-instance vpn1[PE1-ospf-100]area 0[PE1-ospf-100-area-0.0.0.0]network 10.0.11.0 0.0.0.255[PE1]ospf 200 vpn-instance vpn2[PE1-ospf-200]area 0[PE1-ospf-200-area-0.0.0.0]network 10.0.13.0 0.0.0.255CE1的配置：
[CE1]ospf 100[CE1-ospf-100]area 0[CE1-ospf-100-area-0.0.0.0]network 10.10.10.10 0.0.0.0[CE1-ospf-100-area-0.0.0.0]network 10.0.11.0 0.0.0.255CE3的配置：
[CE3]ospf 200[CE3-ospf-200]area 0[CE3-ospf-200-area-0.0.0.0]network 10.0.13.0 0.0.0.255[CE3-ospf-200-area-0.0.0.0]network 30.30.30.30 0.0.0.06）配置PE之间的mp-bgp
配置MP-BGP的邻居关系
PE1的配置：
[PE1]bgp 100[PE1-bgp]peer 3.3.3.3 as-number 100[PE1-bgp]peer 3.3.3.3 connect-interface LoopBack 0[PE1-bgp]ipv4-family vpnv4[PE1-bgp-af-vpnv4]peer 3.3.3.3 enablePE2的配置：
[PE2]bgp 100[PE2-bgp]peer 1.1.1.1 as-number 100[PE2-bgp]peer 1.1.1.1 connect-interface LoopBack 0[PE2-bgp]ipv4-family vpnv4[PE2-bgp-af-vpnv4]peer 1.1.1.1 enable查看PE1的vpnv4邻居是否建立：
[PE1]display bgp vpnv4 all peerBGP local router ID : 12.1.1.1Local AS number : 100Total number of peers : 1 Peers in established state : 1Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv3.3.3.3 4 100 2 3 0 00:00:49 Established 0在PE将从CE学习到的ospf路由引入到BGP中，通过MP-BGP传递给对端PE，并且将BGP的路由引入到ospf中，发布给CE设备。
PE1的配置：
[PE1]bgp 100[PE1-bgp]ipv4-family vpn-instance vpn1[PE1-bgp-vpn1]import-route ospf 100[PE1-bgp-vpn1]q[PE1-bgp]ipv4-family vpn-instance vpn2[PE1-bgp-vpn2]import-route ospf 200[PE1]ospf 100[PE1-ospf-100]import-route bgp[PE1]ospf 200[PE1-ospf-200]import-route bgpPE2的配置：
[PE2]bgp 100[PE2-bgp]ipv4-family vpn-instance vpn1[PE2-bgp-vpn1]import-route ospf 100[PE2-bgp-vpn1]q[PE2-bgp]ipv4-family vpn-instance vpn2[PE2-bgp-vpn2]import-route ospf 200[PE2]ospf 100[PE2-ospf-100]import-route bgp[PE2]ospf 200[PE2-ospf-200]import-route bgp查看PE2的BGP vpnv4路由：
查看vpn实例vpn1的路由表
[PE2]display bgp vpnv4 vpn-instance vpn1 routing-tableBGP Local router ID is 23.1.1.2Status codes: * - valid, > - best, d - damped,h - history, i - internal, s - suppressed, S - StaleOrigin : i - IGP, e - EGP, ? - incompleteVPN-Instance vpn1, Router ID 23.1.1.2:Total Number of Routes: 5Network NextHop MED LocPrf PrefVal Path/Ogn*> 10.0.2.0/24 0.0.0.0 3 0 ?*>i 10.0.11.0/24 1.1.1.1 0 100 0 ?*> 10.0.100.0/24 0.0.0.0 0 0 ?*>i 10.10.10.10/32 1.1.1.1 2 100 0 ?*> 20.20.20.20/32 0.0.0.0 3 0 ?结果表明，包含CE1（10.10.10.10）和CE2（20.20.20.20）的路由信息。
查看vpn实例vpn2的路由表
[PE2]display bgp vpnv4 vpn-instance vpn2 routing-tableBGP Local router ID is 23.1.1.2Status codes: * - valid, > - best, d - damped,h - history, i - internal, s - suppressed, S - StaleOrigin : i - IGP, e - EGP, ? - incompleteVPN-Instance vpn2, Router ID 23.1.1.2:Total Number of Routes: 5Network NextHop MED LocPrf PrefVal Path/Ogn*> 10.0.4.0/24 0.0.0.0 3 0 ?*>i 10.0.13.0/24 1.1.1.1 0 100 0 ?*> 10.0.101.0/24 0.0.0.0 0 0 ?*>i 30.30.30.30/32 1.1.1.1 2 100 0 ?*> 40.40.40.40/32 0.0.0.0 3 0 ?结果表明，包含CE3（30.30.30.30）和CE4（40.40.40.40）的路由信息。
以vpn实例vpn1的站点为例，查看CE1和CE2的路由表：
<CE1>display ip routing-tableRoute Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: PublicDestinations : 11 Routes : 11 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 OSPF 10 4 D 10.0.11.1 GigabitEthernet0/0/010.0.11.0/24 Direct 0 0 D 10.0.11.2 GigabitEthernet0/0/010.0.11.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.11.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.100.0/24 O_ASE 150 1 D 10.0.11.1 GigabitEthernet0/0/010.10.10.10/32 Direct 0 0 D 127.0.0.1 LoopBack020.20.20.20/32 OSPF 10 4 D 10.0.11.1 GigabitEthernet0/0/0127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0<CE2>display ip routing-tableRoute Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: PublicDestinations : 11 Routes : 11 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 Direct 0 0 D 10.0.2.2 GigabitEthernet0/0/010.0.2.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.11.0/24 O_ASE 150 1 D 10.0.2.1 GigabitEthernet0/0/010.0.100.0/24 OSPF 10 2 D 10.0.2.1 GigabitEthernet0/0/010.10.10.10/32 OSPF 10 4 D 10.0.2.1 GigabitEthernet0/0/020.20.20.20/32 Direct 0 0 D 127.0.0.1 LoopBack0127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明CE1能够学习到CE2的20.20.20.20/32的路由，但是CE2无法学习到CE1的10.10.10.10/32的路由。
查看MCE的vpn实例路由表，
[MCE]display ip routing-table vpn-instance vpn1Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: vpn1Destinations : 8 Routes : 8 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 Direct 0 0 D 10.0.2.1 GigabitEthernet0/0/110.0.2.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.100.0/24 Direct 0 0 D 10.0.100.2 GigabitEthernet0/0/0.1010.0.100.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1010.0.100.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1020.20.20.20/32 OSPF 10 1 D 10.0.2.2 GigabitEthernet0/0/1255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明，MCE并没有10.10.10.10/32的路由信息。但是与PE2的ospf邻居可以正常建立。
查看MCE的ospf 100的lsdb。
[MCE]display ospf 100 lsdbOSPF Process 100 with Router ID 10.0.100.2Link State DatabaseArea: 0.0.0.0Type LinkState ID AdvRouter Age Len Sequence MetricRouter 10.0.2.2 10.0.2.2 494 48 80000004 1Router 10.0.100.2 10.0.100.2 489 48 80000008 1Router 10.0.100.1 10.0.100.1 599 36 80000005 1Network 10.0.2.1 10.0.100.2 489 32 80000002 0Network 10.0.100.1 10.0.100.1 599 32 80000002 0Sum-Net 10.10.10.10 10.0.100.1 134 28 80000001 2AS External DatabaseType LinkState ID AdvRouter Age Len Sequence MetricExternal 10.0.11.0 10.0.100.1 134 36 80000001 1结果表明，可以学习到10.10.10.10这条3类lsa，但是并没有产生10.10.10.10/32的ospf路由。原因是由于为了防止环路，OSPF多实例进程使用LSA Options域中一个原先未使用的比特作为标志位，称为DN位。当设备收到DN置位的lsa时，将执行接收不计算的动作，因此需要在ospf进程中关闭该功能。
在MCE中关闭环路检测功能
MCE的配置：
[MCE]ospf 100[MCE-ospf-100]vpn-instance-capability simple//用来禁止路由环路检测，直接进行路由计算。[MCE]ospf 200[MCE-ospf-200]vpn-instance-capability simple再次查看MCE的vpn实例vpn1的路由表
[MCE]display ip routing-table vpn-instance vpn1Route Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: vpn1Destinations : 10 Routes : 10 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 Direct 0 0 D 10.0.2.1 GigabitEthernet0/0/110.0.2.1/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/110.0.11.0/24 O_ASE 150 1 D 10.0.100.1 GigabitEthernet0/0/0.1010.0.100.0/24 Direct 0 0 D 10.0.100.2 GigabitEthernet0/0/0.1010.0.100.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1010.0.100.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/0.1010.10.10.10/32 OSPF 10 3 D 10.0.100.1 GigabitEthernet0/0/0.1020.20.20.20/32 OSPF 10 1 D 10.0.2.2 GigabitEthernet0/0/1255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明，可以正常学习到10.10.10.10/32的路由信息。
查看CE2的路由表
<CE2>display ip routing-tableRoute Flags: R - relay, D - download to fib------------------------------------------------------------------------------Routing Tables: PublicDestinations : 11 Routes : 11 Destination/Mask Proto Pre Cost Flags NextHop Interface10.0.2.0/24 Direct 0 0 D 10.0.2.2 GigabitEthernet0/0/010.0.2.2/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.2.255/32 Direct 0 0 D 127.0.0.1 GigabitEthernet0/0/010.0.11.0/24 O_ASE 150 1 D 10.0.2.1 GigabitEthernet0/0/010.0.100.0/24 OSPF 10 2 D 10.0.2.1 GigabitEthernet0/0/010.10.10.10/32 OSPF 10 4 D 10.0.2.1 GigabitEthernet0/0/020.20.20.20/32 Direct 0 0 D 127.0.0.1 LoopBack0127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0127.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0255.255.255.255/32 Direct 0 0 D 127.0.0.1 InLoopBack0结果表明，也可以正常学习到10.10.10.10/32的路由信息。
7）测试实验结果
<CE1>ping 20.20.20.20PING 20.20.20.20: 56 data bytes, press CTRL_C to breakReply from 20.20.20.20: bytes=56 Sequence=1 ttl=251 time=50 msReply from 20.20.20.20: bytes=56 Sequence=2 ttl=251 time=40 msReply from 20.20.20.20: bytes=56 Sequence=3 ttl=251 time=50 msReply from 20.20.20.20: bytes=56 Sequence=4 ttl=251 time=50 msReply from 20.20.20.20: bytes=56 Sequence=5 ttl=251 time=40 ms--- 20.20.20.20 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 40/46/50 ms<CE1>ping 40.40.40.40PING 40.40.40.40: 56 data bytes, press CTRL_C to breakRequest time outRequest time outRequest time outRequest time outRequest time out--- 40.40.40.40 ping statistics ---5 packet(s) transmitted0 packet(s) received100.00% packet lossCE1可以正常访问CE2，但是无法访问CE4。
<CE3>ping 40.40.40.40 PING 40.40.40.40: 56 data bytes, press CTRL_C to breakReply from 40.40.40.40: bytes=56 Sequence=1 ttl=251 time=60 msReply from 40.40.40.40: bytes=56 Sequence=2 ttl=251 time=50 msReply from 40.40.40.40: bytes=56 Sequence=3 ttl=251 time=50 msReply from 40.40.40.40: bytes=56 Sequence=4 ttl=251 time=40 msReply from 40.40.40.40: bytes=56 Sequence=5 ttl=251 time=40 ms--- 40.40.40.40 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 40/48/60 ms<CE3>ping 20.20.20.20PING 20.20.20.20: 56 data bytes, press CTRL_C to breakRequest time outRequest time outRequest time outRequest time outRequest time out--- 20.20.20.20 ping statistics ---5 packet(s) transmitted0 packet(s) received100.00% packet lossCE3无法访问CE2，可以访问CE4。
结果跟实验需求一致。
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