EoMPLS是cisco公司多年以前发布的多重协议卷标交换的城域网络解决方案，英文全称是Ethernet over Multiprotocol Label Switching。下面基于VLAN来研究一下路由器到路由器的应用。 组网拓扑图如下，要用到5台思科的路由器，中间3台是一个MPLS：
配置如下： interface Loopback0 ip address 192.168.1.1 255.255.255.255 no shut ! interface FastEthernet0/1 ip address 23.1.1.2 255.255.255.0 no shut mpls ip ! ! router ospf 100 router-id 2.2.2.2 log-adjacency-changes network 23.1.1.0 0.0.0.255 area 0 network 192.168.1.1 0.0.0.0 area 0 ---------------------P---------------------- mpls label range 300 399 mpls label protocol ldp mpls ldp router-id Loopback0 ! interface Loopback0 ip address 192.168.1.2 255.255.255.255 no shut interface FastEthernet0/0 ip address 34.1.1.3 255.255.255.0 no shut mpls ip ! interface FastEthernet0/1 ip address 23.1.1.3 255.255.255.0 no shut mpls ip ! ! router ospf 100 router-id 3.3.3.3 log-adjacency-changes network 23.1.1.0 0.0.0.255 area 0 network 34.1.1.0 0.0.0.255 area 0 network 192.168.1.2 0.0.0.0 area 0 -----------------PE2--------------------- mpls label range 400 499 mpls label protocol ldp mpls ldp router-id Loopback0 ! interface Loopback0 ip address 192.168.1.3 255.255.255.255 no shut interface FastEthernet0/0 ip address 34.1.1.4 255.255.255.0 http://www.luyouqiwang.com/14768/ mpls ip no shut router ospf 100 router-id 4.4.4.4 log-adjacency-changes network 34.1.1.0 0.0.0.255 area 0 network 192.168.1.3 0.0.0.0 area 0 ------------------CE1----------------------- interface FastEthernet0/0.100 encapsulation dot1Q 100 ip address 192.168.100.100 255.255.255.0 ------------------CE2------------------ interface FastEthernet0/1.100 encapsulation dot1Q 100 ip address 192.168.100.105 255.255.255.0 验证基本联通性： （1）验证路由
（2）验证启用了MPLS的接口是否可以
（3）验证P路由器已经发现PE路由器
（4）验证邻居
配置端口透传 （PE1）F0/0接口
（PE2）F0/1接口
说明：ip地址是对端回环口IP地址，伪线封装MPLS. （1）VC状态
（2）标签转发表
（3）连通性
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