1.PE1和P和PE2之间跑IGP协议 运营商里面首选的还是ISIS协议我们实验的话,用的是OSPF协议 R3的IP地址和OSPF配置 [R3]display ip int brief *down: administratively down ^down: standby (l): loopback (s): spoofing The number of interface that is UP in Physical is 5 The number of interface that is D…