请问而让他

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version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
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hostname Router
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no ip cef
no ipv6 cef
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spanning-tree mode pvst
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interface FastEthernet0/0
ip address 192.168.2.1 255.255.255.0
duplex auto
speed auto
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interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
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interface Serial1/0
ip address 192.168.4.2 255.255.255.0
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interface Serial1/1
no ip address
clock rate 2000000
shutdown
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interface Serial1/2
no ip address
clock rate 2000000
shutdown
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interface Serial1/3
no ip address
clock rate 2000000
shutdown
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interface Vlan1
no ip address
shutdown
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ip classless
ip route 0.0.0.0 0.0.0.0 192.168.4.1
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ip flow-export version 9
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line con 0
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line aux 0
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line vty 0 4
login
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end