R31#show running-config
Building configuration...

Current configuration : 3505 bytes
!
! Last configuration change at 19:58:52 UTC Sat Jul 17 2021
!
version 15.6
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
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hostname R31
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boot-start-marker
boot-end-marker
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no aaa new-model
ethernet lmi ce
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mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
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ip cef
no ipv6 cef
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multilink bundle-name authenticated
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redundancy
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interface Tunnel100
 bandwidth 4000
 ip address 192.168.100.31 255.255.255.0
 ip mtu 1400
 ip nhrp network-id 100
 ip nhrp nhs 192.168.100.11 nbma 172.16.11.1 multicast
 ip tcp adjust-mss 1360
 tunnel source GigabitEthernet0/1
 tunnel destination 172.16.11.1
 tunnel key 100
!
interface GigabitEthernet0/0
 ip address 10.2.2.2 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/1
 ip address 172.16.31.1 255.255.255.0
 no ip split-horizon eigrp 100
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/2
 no ip address
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/3
 no ip address
 duplex auto
 speed auto
 media-type rj45
!
!
router eigrp NHRP
 !
 address-family ipv4 unicast autonomous-system 100
  !
  topology base
  exit-af-topology
  network 10.2.2.2 0.0.0.0
  network 192.168.100.0
  network 192.168.100.31 0.0.0.0
 exit-address-family
!
router ospf 1
 network 172.16.31.1 0.0.0.0 area 0
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ip forward-protocol nd
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no ip http server
no ip http secure-server
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control-plane
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banner exec ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
banner incoming ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
banner login ^C
**************************************************************************
* IOSv is strictly limited to use for evaluation, demonstration and IOS  *
* education. IOSv is provided as-is and is not supported by Cisco's      *
* Technical Advisory Center. Any use or disclosure, in whole or in part, *
* of the IOSv Software or Documentation to any third party for any       *
* purposes is expressly prohibited except as otherwise authorized by     *
* Cisco in writing.                                                      *
**************************************************************************^C
!
line con 0
line aux 0
line vty 0 4
 login
 transport input none
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no scheduler allocate
!
end