R3#show running-config
Building configuration...

Current configuration : 1424 bytes
!
! Last configuration change at 10:42:05 UTC Mon Jan 19 2026
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
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ip cef
!
!
!
!


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no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
license udi pid CISCO2901/K9 sn FCZ182293K6
license boot module c2900 technology-package datak9
!
!
!
redundancy
!
!
!
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interface Loopback100
 ip address 100.100.100.241 255.255.255.0
!
interface Embedded-Service-Engine0/0
 no ip address
 shutdown
!
interface GigabitEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0/0
 no ip address
 shutdown
 clock rate 2000000
!
interface Serial0/0/1
 bandwidth 1024
 ip address 1.1.1.6 255.255.255.252
 clock rate 64000
!
!
!
router eigrp 100
 network 1.1.1.4 0.0.0.3
 passive-interface Loopback100
 eigrp router-id 1.1.1.1
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Loopback100
!
!
!
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control-plane
!
!
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line con 0
line aux 0
line 2
 no activation-character
 no exec
 transport preferred none
 transport output lat pad telnet rlogin lapb-ta mop udptn v120 ssh
 stopbits 1
line vty 0 4
 login
 transport input all
!
scheduler allocate 20000 1000
!
end




R3#show ip int brief
Interface                  IP-Address      OK? Method Status                Protocol
Embedded-Service-Engine0/0 unassigned      YES unset  administratively down down
GigabitEthernet0/0         unassigned      YES unset  administratively down down
GigabitEthernet0/1         unassigned      YES unset  administratively down down
Serial0/0/0                unassigned      YES unset  administratively down down
Serial0/0/1                1.1.1.6         YES manual up                    up
Loopback100                100.100.100.241 YES manual up                    up





R3#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

S*    0.0.0.0/0 is directly connected, Loopback100
      1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        1.1.1.4/30 is directly connected, Serial0/0/1
L        1.1.1.6/32 is directly connected, Serial0/0/1
      100.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        100.100.100.0/24 is directly connected, Loopback100
L        100.100.100.241/32 is directly connected, Loopback100



