有意思的是，在CCIE的lab考试中，可以通过一些debug和show的命令让你很快地通过CCIE的lab考试，下面是CCIE lab 考试中常用的show命令。

    Catalyst交换机

   

show vlan brief show interface trunk show interface switchport show vtp status show spanning-tree vlan

    Frame帧中继网络

   

show frame map show frame pvc

    OSPF路由协议

show ip route ospf show ip ospf neighbor show ip ospf show ip ospf interface

    EIGRP路由协议

   

show ip eigrp neighbor show ip eigrp topology show ip route eigrp show ip protocol

    RIP version 2

show ip route rip clear ip route * debug ip rip

    BGP

  

show ip bgp summary show ip bgp show ip bgp neighbor x.x.x.x advertised-routes show ip bgp regex show ip bgp rib-failure show ip route bgp

    IP Multicast

show ip pim neighbor debug ip mpacket debug ip pim show ip pim neighbor show ip pim interface show ip pim rp map show ip mroute count show ip mroute show ip route

    好好利用这些debug和show的命令，对在CCIE lab考试时候的排错有很大的帮助。