R1#show run
Building configuration...

Current configuration : 2502 bytes
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! Last configuration change at 11:46:34 UTC Mon Jan 19 2026
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version 15.7
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
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hostname R1
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boot-start-marker
boot-end-marker
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no aaa new-model
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ip dhcp excluded-address 172.16.10.1 172.16.10.10
ip dhcp excluded-address 172.16.20.1 172.16.20.10
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ip dhcp pool vlan10
 default-router 172.16.10.1
 dns-server 1.1.1.1
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ip dhcp pool vlan20
 default-router 172.16.20.1
 dns-server 1.1.1.1
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ip dhcp pool 10
 network 172.16.10.0 255.255.255.0
 default-router 172.16.10.1
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no ip domain lookup
ip cef
no ipv6 cef
multilink bundle-name authenticated
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license udi pid CISCO1921/K9 sn FCZ21184015
license boot module c1900 technology-package datak9
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redundancy
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interface Loopback1
 no ip address
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interface Loopback11
 ip address 192.168.11.1 255.255.255.0
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interface Loopback12
 ip address 192.168.12.1 255.255.255.0
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interface Loopback13
 ip address 192.168.13.1 255.255.255.0
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interface Embedded-Service-Engine0/0
 no ip address
 shutdown
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interface GigabitEthernet0/0
 no ip address
 duplex auto
 speed auto
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interface GigabitEthernet0/0.10
 encapsulation dot1Q 10
 ip address 172.16.10.1 255.255.255.0
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interface GigabitEthernet0/0.20
 encapsulation dot1Q 20
 ip address 172.16.20.1 255.255.255.0
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interface GigabitEthernet0/0.30
 encapsulation dot1Q 30
 ip address 172.16.30.1 255.255.255.0
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interface GigabitEthernet0/0.99
 encapsulation dot1Q 99
 ip address 172.16.99.1 255.255.255.0
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interface GigabitEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
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interface Serial0/0/0
 bandwidth 1024
 ip address 1.1.1.1 255.255.255.252
 clock rate 64000
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interface Serial0/0/1
 no ip address
 shutdown
 clock rate 2000000
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interface Serial0/1/0
 no ip address
 shutdown
 clock rate 2000000
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interface Serial0/1/1
 no ip address
 shutdown
 clock rate 2000000
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router eigrp 100
 network 1.1.1.0 0.0.0.3
 network 172.16.10.0 0.0.0.255
 network 172.16.20.0 0.0.0.255
 network 172.16.30.0 0.0.0.255
 network 172.16.99.0 0.0.0.255
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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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ipv6 ioam timestamp
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control-plane
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 vstack
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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 none
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scheduler allocate 20000 1000
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end




R1#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  up                    up
GigabitEthernet0/0.10      172.16.10.1     YES manual up                    up
GigabitEthernet0/0.20      172.16.20.1     YES manual up                    up
GigabitEthernet0/0.30      172.16.30.1     YES manual up                    up
GigabitEthernet0/0.99      172.16.99.1     YES manual up                    up
GigabitEthernet0/1         unassigned      YES unset  administratively down down
Serial0/0/0                1.1.1.1         YES manual up                    up
Serial0/0/1                unassigned      YES unset  administratively down down
Serial0/1/0                unassigned      YES unset  administratively down down
Serial0/1/1                unassigned      YES unset  administratively down down
Loopback1                  unassigned      YES unset  up                    up
Loopback11                 192.168.11.1    YES manual up                    up
Loopback12                 192.168.12.1    YES manual up                    up
Loopback13                 192.168.13.1    YES manual up                    up



R1#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
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      1.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C        1.1.1.0/30 is directly connected, Serial0/0/0
L        1.1.1.1/32 is directly connected, Serial0/0/0
D        1.1.1.4/30 [90/3523840] via 1.1.1.2, 00:26:51, Serial0/0/0
      172.16.0.0/16 is variably subnetted, 8 subnets, 2 masks
C        172.16.10.0/24 is directly connected, GigabitEthernet0/0.10
L        172.16.10.1/32 is directly connected, GigabitEthernet0/0.10
C        172.16.20.0/24 is directly connected, GigabitEthernet0/0.20
L        172.16.20.1/32 is directly connected, GigabitEthernet0/0.20
C        172.16.30.0/24 is directly connected, GigabitEthernet0/0.30
L        172.16.30.1/32 is directly connected, GigabitEthernet0/0.30
C        172.16.99.0/24 is directly connected, GigabitEthernet0/0.99
L        172.16.99.1/32 is directly connected, GigabitEthernet0/0.99
      192.168.11.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.11.0/24 is directly connected, Loopback11
L        192.168.11.1/32 is directly connected, Loopback11
      192.168.12.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.12.0/24 is directly connected, Loopback12
L        192.168.12.1/32 is directly connected, Loopback12
      192.168.13.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.13.0/24 is directly connected, Loopback13
L        192.168.13.1/32 is directly connected, Loopback13



