【正文】 st configuration change at 15:32:16 UTC Thu Oct 8 2015!version service timestamps debug datetime msecservice timestamps log datetime msecno service passwordencryptionservice pressconfig!hostname L2_SW6!!!spanningtree mode pvstspanningtree extend systemid!!interface Ethernet0/0 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto!interface Ethernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto!interface Ethernet0/2 switchport access vlan 60 switchport mode access duplex auto!interface Ethernet0/3 switchport access vlan 60 switchport mode access duplex auto!interface Ethernet1/0 switchport access vlan 60 switchport mode access duplex auto!endL2_SW7：L2_SW7show run hostname L2_SW7!spanningtree mode pvstspanningtree extend systemid!interface Ethernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto!interface Ethernet0/2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto! endL2_SW8：L2_SW8show runhostname L2_SW8!spanningtree mode pvstspanningtree extend systemidspanningtree vlan 60 priority 24576!interface Ethernet0/0 no switchport ip address !interface Ethernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto!interface Ethernet0/2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 60 switchport mode trunk duplex auto!interface Vlan60 ip address !router ospf 100 network area 0 network area 0!endL3_SW1：L3_SW1show runhostname L3_SW1!spanningtree mode pvstspanningtree extend systemidspanningtree vlan 10,30 priority 24576spanningtree vlan 20,40 priority 28672!interface Portchannel1 switchport switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk!interface Ethernet0/0 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto! interface Ethernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto channelgroup 1 mode on!interface Ethernet0/2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto channelgroup 1 mode on!interface Ethernet0/3 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet1/0 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet1/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet3/3 no switchport ip address !interface Vlan1 no ip address shutdown!interface Vlan10 ip address !interface Vlan20 ip address !interface Vlan30 ip address !interface Vlan40 ip address !router ospf 100 network area 0 network area 0 network area 0 network area 0 network area 0!endL3_SW2：L3_SW2show runhostname L3_SW2!!spanningtree mode pvstspanningtree extend systemidspanningtree vlan 10,30 priority 28672spanningtree vlan 20,40 priority 24576!!interface Portchannel1 switchport switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk!interface Ethernet0/0 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto! interface Ethernet0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto channelgroup 1 mode on!interface Ethernet0/2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto channelgroup 1 mode on!interface Ethernet0/3 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet1/0 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet1/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 10,20,30,40 switchport mode trunk duplex auto!interface Ethernet3/3 no switchport ip address !interface Vlan10 ip address !interface Vlan20 ip address !interface Vlan30 ip address !interface Vlan40 ip address !router ospf 100 network area 0 network area 0 network area 0 network area 0 network area 0!endR1：R1show run!hostname R1!!interface Ethernet0/0 ip address !interface Ethernet0/1 ip address shutdown!interface Ethernet0/2 ip address !interface Ethernet0/3 ip address !router ospf 100 network area 0 network area 0 network area 0 network area 0endR2：R2show run!hostname R2!interface Ethernet3/0 ip address ip nat inside ip virtualreassembly halfduplex!interface Ethernet3/1 ip address ip nat inside ip virtualreassembly halfduplex!interface Ethernet3/2 ip address ip accessgroup outinserver in ip nat outside ip virtualreassembly halfduplex!router ospf 100 logadjacencychanges network area 0 network area 0 network area 0!ip nat pool server netmask type rotaryip nat inside source list 2 interface Ethernet3/2 overloadip nat inside source list 3 interface Ethernet3/2 overloadip nat inside source list 4 interface Ethernet3/2 overloadip nat insid