R2#sh run
Building configuration...

Current configuration : 1133 bytes
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version 15.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
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hostname R2
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ip dhcp pool mypool
 network 10.21.1.0 255.255.255.128
 default-router 10.21.1.50
 dns-server 11.1.1.10
ip dhcp pool mypool2
 network 10.21.1.128 255.255.255.128
 default-router 10.21.1.129
 dns-server 11.1.1.10
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no ip cef
no ipv6 cef
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spanning-tree mode pvst
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interface GigabitEthernet0/0/0
 no ip address
 duplex auto
 speed auto
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interface GigabitEthernet0/0/0.10
 encapsulation dot1Q 10
 ip address 10.21.1.50 255.255.255.128
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interface GigabitEthernet0/0/0.20
 encapsulation dot1Q 20
 ip address 10.21.1.129 255.255.255.128
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interface GigabitEthernet0/0/1
 no ip address
 duplex auto
 speed auto
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interface Serial0/1/0
 ip address 10.21.5.5 255.255.255.252
 clock rate 500000
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interface Serial0/1/1
 ip address 10.21.5.2 255.255.255.252
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interface Vlan1
 no ip address
 shutdown
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router eigrp 100
 network 10.0.0.0
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ip classless
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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