CE1#show run
Building configuration...

Current configuration : 1775 bytes
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version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
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hostname CE1
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boot-start-marker
boot-end-marker
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no aaa new-model
memory-size iomem 5
ip cef
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no ip domain lookup
ip host CE2 10.0.0.3
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
ip sla monitor 1
 type echo protocol ipIcmpEcho 100.0.0.1 source-interface FastEthernet0/1
 frequency 5
ip sla monitor schedule 1 life forever start-time now
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track 1 rtr 1
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interface FastEthernet0/0
 description **INSIDE LAN**
 no ip address
 speed 100
 full-duplex
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interface FastEthernet0/0.10
 description **GW VLAN10** 
 encapsulation dot1Q 10
 ip address 10.0.0.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 standby 1 ip 10.0.0.1
 standby 1 priority 110
 standby 1 preempt
 standby 1 authentication md5 key-string bilal
 standby 1 track 1 decrement 100
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interface FastEthernet0/0.20
 description **GW VLAN20** 
 encapsulation dot1Q 20
 ip address 20.0.0.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 standby 2 ip 20.0.0.1
 standby 2 priority 90
 standby 2 preempt
 standby 2 authentication md5 key-string bilal
 standby 2 track 1 decrement 100
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interface FastEthernet0/1
 ip address 1.1.1.2 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 speed 100
 full-duplex
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ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 1.1.1.1
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ip http server
no ip http secure-server
ip nat inside source list 1 interface FastEthernet0/1 overload
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access-list 1 remark **MY_NAT_FOR_LAN**
access-list 1 permit 10.0.0.0 0.0.0.255
access-list 1 permit 20.0.0.0 0.0.0.255
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control-plane
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line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 login
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end