R3 - running-config

R3#show run
Building configuration...

Current configuration : 6143 bytes
!
! Last configuration change at 15:02:23 UTC Mon Jan 19 2026
!
version 17.6
service timestamps debug datetime msec
service timestamps log datetime msec
! Call-home is enabled by Smart-Licensing.
service call-home
platform qfp utilization monitor load 80
platform punt-keepalive disable-kernel-core
!
hostname R3
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
no ip domain lookup
!
!
!
login on-success log
!
!
!
!
!
!
!
subscriber templating
multilink bundle-name authenticated
!
!
!
crypto pki trustpoint TP-self-signed-124253181
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-124253181
 revocation-check none
 rsakeypair TP-self-signed-124253181
!
crypto pki trustpoint SLA-TrustPoint
 enrollment pkcs12
 revocation-check crl
!
!
crypto pki certificate chain TP-self-signed-124253181
 certificate self-signed 01
  3082032E 30820216 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
  30312E30 2C060355 04031325 494F532D 53656C66 2D536967 6E65642D 43657274
  69666963 6174652D 31323432 35333138 31301E17 0D323630 31313931 32333631
  335A170D 33363031 31393132 33363133 5A303031 2E302C06 03550403 1325494F
  532D5365 6C662D53 69676E65 642D4365 72746966 69636174 652D3132 34323533
  31383130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030 82010A02
  82010100 A055A7A5 115752A7 4175B0AE C42C327E 115477DB 21041385 28CCD91F
  16CCAE1F 25E63928 4AA91A77 D770A3C8 49DC840D B8C378FA BAE589E6 89CCBFF0
  AF877A0D C608AE61 B40C7BEC B1EAB892 579D7666 0E681583 8FB405EC B4A0AB89
  45F8AD25 61FF282B 203ACC49 36FED18C 9BED2BC6 5BFF696A F1AC1D14 22509409
  9EF5C06F 35064F37 752C4E36 31E61206 4126795D 32144204 E4093E35 2505417D
  E35F98F7 C38527FF 63BC2D1F CC505459 767A4B0E D50B1A05 4FC82DB1 1BFA8A71
  C4EA3D2C 2F7A6A85 4F4902F1 836F1E4D 7ECE267C FDAAEFCF B3D9F5A7 730AAAA9
  733735C0 0817D879 BB173AFC E101E09C 53D6B62C 86584DE4 F018E19B B3DF7B02
  A55697A5 02030100 01A35330 51300F06 03551D13 0101FF04 05300301 01FF301F
  0603551D 23041830 168014F4 4844A0C6 916E1EC8 8C0B3371 05B2625B 0A759A30
  1D060355 1D0E0416 0414F448 44A0C691 6E1EC88C 0B337105 B2625B0A 759A300D
  06092A86 4886F70D 01010505 00038201 01006229 5884D6BD F3CCF490 A018FAA6
  261DA943 DED7A334 1D649880 1CD12895 11682B0F 8609E6B7 47578C45 5E96E1F9
  66526555 B8F9A38E A22EF5DF 4A421B48 5A4D2E8A C6C8EAE9 C467CFE7 7CEBF887
  1E24662E 3159AD7E 99ED9CC9 85F9AA30 3FDB03F2 BC16BC4F 21AC48E3 70FD8897
  E62DF9FD 4CE58E28 48E21115 12609286 0C827179 2F049896 6A4C9748 48D92610
  73D54DA6 DD47CAAF 5AC9B3EC F77D2579 EF372907 35829A33 E68CA30E F0F9CF94
  FEBEA9DE DA2A7EE4 F3C62847 7FEC5CBC 12020392 D2093BE8 07895442 6CBF15C7
  45B27A73 88B75DB5 CA44B547 E15CB3DA A844F755 3BAE7887 39FA425B BC1783DE
  5A0CD53F BD27771C 2A302C6A 888E5B2C 10D0
        quit
crypto pki certificate chain SLA-TrustPoint
 certificate ca 01
  30820321 30820209 A0030201 02020101 300D0609 2A864886 F70D0101 0B050030
  32310E30 0C060355 040A1305 43697363 6F312030 1E060355 04031317 43697363
  6F204C69 63656E73 696E6720 526F6F74 20434130 1E170D31 33303533 30313934
  3834375A 170D3338 30353330 31393438 34375A30 32310E30 0C060355 040A1305
  43697363 6F312030 1E060355 04031317 43697363 6F204C69 63656E73 696E6720
  526F6F74 20434130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030
  82010A02 82010100 A6BCBD96 131E05F7 145EA72C 2CD686E6 17222EA1 F1EFF64D
  CBB4C798 212AA147 C655D8D7 9471380D 8711441E 1AAF071A 9CAE6388 8A38E520
  1C394D78 462EF239 C659F715 B98C0A59 5BBB5CBD 0CFEBEA3 700A8BF7 D8F256EE
  4AA4E80D DB6FD1C9 60B1FD18 FFC69C96 6FA68957 A2617DE7 104FDC5F EA2956AC
  7390A3EB 2B5436AD C847A2C5 DAB553EB 69A9A535 58E9F3E3 C0BD23CF 58BD7188
  68E69491 20F320E7 948E71D7 AE3BCC84 F10684C7 4BC8E00F 539BA42B 42C68BB7
  C7479096 B4CB2D62 EA2F505D C7B062A4 6811D95B E8250FC4 5D5D5FB8 8F27D191
  C55F0D76 61F9A4CD 3D992327 A8BB03BD 4E6D7069 7CBADF8B DF5F4368 95135E44
  DFC7C6CF 04DD7FD1 02030100 01A34230 40300E06 03551D0F 0101FF04 04030201
  06300F06 03551D13 0101FF04 05300301 01FF301D 0603551D 0E041604 1449DC85
  4B3D31E5 1B3E6A17 606AF333 3D3B4C73 E8300D06 092A8648 86F70D01 010B0500
  03820101 00507F24 D3932A66 86025D9F E838AE5C 6D4DF6B0 49631C78 240DA905
  604EDCDE FF4FED2B 77FC460E CD636FDB DD44681E 3A5673AB 9093D3B1 6C9E3D8B
  D98987BF E40CBD9E 1AECA0C2 2189BB5C 8FA85686 CD98B646 5575B146 8DFC66A8
  467A3DF4 4D565700 6ADF0F0D CF835015 3C04FF7C 21E878AC 11BA9CD2 55A9232C
  7CA7B7E6 C1AF74F6 152E99B7 B1FCF9BB E973DE7F 5BDDEB86 C71E3B49 1765308B
  5FB0DA06 B92AFE7F 494E8A9E 07B85737 F3A58BE1 1A48A229 C37C1E69 39F08678
  80DDCD16 D6BACECA EEBC7CF9 8428787B 35202CDC 60E4616A B623CDBD 230E3AFB
  418616A9 4093E049 4D10AB75 27E86F73 932E35B5 8862FDAE 0275156F 719BB2F0
  D697DF7F 28
        quit
!
!
license udi pid C8200L-1N-4T sn FGL2725L1TD
memory free low-watermark processor 67482
!
diagnostic bootup level minimal
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
!
!
!
!
!
!
interface Loopback100
 ip address 100.100.100.241 255.255.255.0
!
interface GigabitEthernet0/0/0
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/1
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/2
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/3
 no ip address
 shutdown
 negotiation auto
!
interface Serial0/1/0
 no ip address
 shutdown
!
interface Serial0/1/1
 bandwidth 1024
 ip address 1.1.1.6 255.255.255.252
!
!
router eigrp 100
 network 1.1.1.4 0.0.0.3
 redistribute static
!
ip http server
ip http authentication local
ip http secure-server
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 Loopback100
!
!
!
!
!
!
control-plane
!
!
line con 0
 stopbits 1
line aux 0
line vty 0 4
 login
 transport input ssh
line vty 5 14
 login
 transport input ssh
!
call-home
 ! If contact email address in call-home is configured as sch-smart-licensing@cisco.com
 ! the email address configured in Cisco Smart License Portal will be used as contact email address to send SCH notifications.
 contact-email-addr sch-smart-licensing@cisco.com
 profile "CiscoTAC-1"
  active
  destination transport-method http
!
!
!
!
!
!
end

R3#show ip int brief
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0/0   unassigned      YES unset  administratively down down
GigabitEthernet0/0/1   unassigned      YES unset  administratively down down
GigabitEthernet0/0/2   unassigned      YES unset  administratively down down
GigabitEthernet0/0/3   unassigned      YES unset  administratively down down
Serial0/1/0            unassigned      YES unset  administratively down down
Serial0/1/1            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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       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
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

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, 3 subnets, 2 masks
D        1.1.1.0/30 [90/3523840] via 1.1.1.5, 00:40:05, Serial0/1/1
C        1.1.1.4/30 is directly connected, Serial0/1/1
L        1.1.1.6/32 is directly connected, Serial0/1/1
      10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks
D        10.10.10.0/26 [90/3139840] via 1.1.1.5, 00:40:05, Serial0/1/1
D        10.10.10.64/27 [90/3139840] via 1.1.1.5, 00:40:05, Serial0/1/1
D        10.10.10.160/28 [90/3139840] via 1.1.1.5, 00:40:05, Serial0/1/1
      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
      172.16.0.0/24 is subnetted, 5 subnets
D        172.16.4.0 [90/3139840] via 1.1.1.5, 00:40:05, Serial0/1/1
D        172.16.10.0 [90/3524096] via 1.1.1.5, 00:27:49, Serial0/1/1
D        172.16.20.0 [90/3524096] via 1.1.1.5, 00:27:49, Serial0/1/1
D        172.16.30.0 [90/3524096] via 1.1.1.5, 00:27:49, Serial0/1/1
D        172.16.99.0 [90/3524096] via 1.1.1.5, 00:27:49, Serial0/1/1
D     192.168.11.0/24 [90/3651840] via 1.1.1.5, 00:40:05, Serial0/1/1
D     192.168.12.0/24 [90/3651840] via 1.1.1.5, 00:40:05, Serial0/1/1
D     192.168.13.0/24 [90/3651840] via 1.1.1.5, 00:40:05, Serial0/1/1

R2

R2#show run
Building configuration...

Current configuration : 6425 bytes
!
! Last configuration change at 14:48:06 UTC Mon Jan 19 2026
!
version 17.6
service timestamps debug datetime msec
service timestamps log datetime msec
! Call-home is enabled by Smart-Licensing.
service call-home
platform qfp utilization monitor load 80
platform punt-keepalive disable-kernel-core
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
no ip domain lookup
!
!
!
login on-success log
!
!
!
!
!
!
!
subscriber templating
multilink bundle-name authenticated
!
!
!
crypto pki trustpoint TP-self-signed-1010235761
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-1010235761
 revocation-check none
 rsakeypair TP-self-signed-1010235761
!
crypto pki trustpoint SLA-TrustPoint
 enrollment pkcs12
 revocation-check crl
!
!
crypto pki certificate chain TP-self-signed-1010235761
 certificate self-signed 01
  30820330 30820218 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
  31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
  69666963 6174652D 31303130 32333537 3631301E 170D3236 30313139 31323330
  31345A17 0D333630 31313931 32333031 345A3031 312F302D 06035504 03132649
  4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 30313032
  33353736 31308201 22300D06 092A8648 86F70D01 01010500 0382010F 00308201
  0A028201 01009D00 48F9047C E4BC5E40 46E8D9C4 A2AD72F7 8638C3A3 259BAEF7
  834D7559 55C52101 F410E2B3 7A39CBC8 E9B2E4B5 808EA677 93BED01B 8340E122
  B3A88B7A 1ED04B9E EE05B844 4F4CA160 03A1CCAB C73A5687 38B916A8 42C63A51
  1752EC36 D2AE8C27 E4EC6FCF 4FE66053 CB7C9880 9DC850F5 14719D25 8C83F0AD
  E3EE9DD8 C594B672 FBDC4CF3 F72600B4 1D9A6CA0 C5A0FA39 032B6102 94CF5C2F
  99392F89 072C846E E75B45F4 BC6B251E 36039457 D9A4CC4F 89A8D070 B5B77930
  40D6A209 C6F32A4F B488D7AA D1BEAD3B 2EEC69F6 9F939A1B 566A4D35 EFDFC5DB
  B2B5933B 15AE8A8F A55C3606 2B573389 37205855 8C016A53 7012CF3D EFF2ABEA
  8F37B6E4 2B070203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF
  301F0603 551D2304 18301680 14D726F5 E82544A4 B86F7547 984E6176 306A7153
  87301D06 03551D0E 04160414 D726F5E8 2544A4B8 6F754798 4E617630 6A715387
  300D0609 2A864886 F70D0101 05050003 82010100 78C7A704 873D8D2C 4B8D27B1
  00B1D4A7 1F6C33A7 D5C5E9D0 1143902F 821E75F0 9411FD46 79041231 CE025B92
  1D069488 31BA2BBB D2581713 6719EB21 F640EDA6 FB474ED9 D651DF43 65480C9D
  DE658C02 2AAC4D37 47764303 F406B0DC 6BE6AA6B 515208F4 8BE1257F 7CF5CACD
  CBB8759E 2E5DA7E3 2B4534D8 2A70C1E8 E1A8DE00 4575602D 0623C105 74329544
  837A9410 A5B4AA33 D7E57548 56A12777 066781D9 96052337 241D2C1A 763F91C0
  BDBB5367 3DDD776D 5DF67315 06E904F6 74264F5C CCA8D18B 050A3D33 E9A5DAC6
  5DFB971C C289C27F 71F3CC4E FAF79982 A947321A 110CDD7E DEB65E92 27AF91A3
  0A6D2999 03F6CF98 09309B12 5799DA0E BCA299CB
        quit
crypto pki certificate chain SLA-TrustPoint
 certificate ca 01
  30820321 30820209 A0030201 02020101 300D0609 2A864886 F70D0101 0B050030
  32310E30 0C060355 040A1305 43697363 6F312030 1E060355 04031317 43697363
  6F204C69 63656E73 696E6720 526F6F74 20434130 1E170D31 33303533 30313934
  3834375A 170D3338 30353330 31393438 34375A30 32310E30 0C060355 040A1305
  43697363 6F312030 1E060355 04031317 43697363 6F204C69 63656E73 696E6720
  526F6F74 20434130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030
  82010A02 82010100 A6BCBD96 131E05F7 145EA72C 2CD686E6 17222EA1 F1EFF64D
  CBB4C798 212AA147 C655D8D7 9471380D 8711441E 1AAF071A 9CAE6388 8A38E520
  1C394D78 462EF239 C659F715 B98C0A59 5BBB5CBD 0CFEBEA3 700A8BF7 D8F256EE
  4AA4E80D DB6FD1C9 60B1FD18 FFC69C96 6FA68957 A2617DE7 104FDC5F EA2956AC
  7390A3EB 2B5436AD C847A2C5 DAB553EB 69A9A535 58E9F3E3 C0BD23CF 58BD7188
  68E69491 20F320E7 948E71D7 AE3BCC84 F10684C7 4BC8E00F 539BA42B 42C68BB7
  C7479096 B4CB2D62 EA2F505D C7B062A4 6811D95B E8250FC4 5D5D5FB8 8F27D191
  C55F0D76 61F9A4CD 3D992327 A8BB03BD 4E6D7069 7CBADF8B DF5F4368 95135E44
  DFC7C6CF 04DD7FD1 02030100 01A34230 40300E06 03551D0F 0101FF04 04030201
  06300F06 03551D13 0101FF04 05300301 01FF301D 0603551D 0E041604 1449DC85
  4B3D31E5 1B3E6A17 606AF333 3D3B4C73 E8300D06 092A8648 86F70D01 010B0500
  03820101 00507F24 D3932A66 86025D9F E838AE5C 6D4DF6B0 49631C78 240DA905
  604EDCDE FF4FED2B 77FC460E CD636FDB DD44681E 3A5673AB 9093D3B1 6C9E3D8B
  D98987BF E40CBD9E 1AECA0C2 2189BB5C 8FA85686 CD98B646 5575B146 8DFC66A8
  467A3DF4 4D565700 6ADF0F0D CF835015 3C04FF7C 21E878AC 11BA9CD2 55A9232C
  7CA7B7E6 C1AF74F6 152E99B7 B1FCF9BB E973DE7F 5BDDEB86 C71E3B49 1765308B
  5FB0DA06 B92AFE7F 494E8A9E 07B85737 F3A58BE1 1A48A229 C37C1E69 39F08678
  80DDCD16 D6BACECA EEBC7CF9 8428787B 35202CDC 60E4616A B623CDBD 230E3AFB
  418616A9 4093E049 4D10AB75 27E86F73 932E35B5 8862FDAE 0275156F 719BB2F0
  D697DF7F 28
        quit
!
!
license udi pid C8200L-1N-4T sn FGL2725L1Q3
memory free low-watermark processor 67482
!
diagnostic bootup level minimal
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
!
!
!
!
!
!
interface Loopback1
 ip address 10.10.10.1 255.255.255.192
!
interface Loopback2
 ip address 10.10.10.65 255.255.255.224
!
interface Loopback3
 ip address 10.10.10.161 255.255.255.240
!
interface Loopback4
 ip address 172.16.4.1 255.255.255.0
!
interface GigabitEthernet0/0/0
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/1
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/2
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/3
 no ip address
 shutdown
 negotiation auto
!
interface Serial0/1/0
 bandwidth 1024
 ip address 1.1.1.2 255.255.255.252
!
interface Serial0/1/1
 bandwidth 1024
 ip address 1.1.1.5 255.255.255.252
 clock rate 64000
!
!
router eigrp 100
 network 0.0.0.0
 passive-interface Loopback1
 passive-interface Loopback2
 passive-interface Loopback3
 passive-interface Loopback4
!
ip http server
ip http authentication local
ip http secure-server
ip forward-protocol nd
!
!
!
!
!
!
control-plane
!
!
line con 0
 stopbits 1
line aux 0
line vty 0 4
 login
 transport input ssh
line vty 5 14
 login
 transport input ssh
!
call-home
 ! If contact email address in call-home is configured as sch-smart-licensing@cisco.com
 ! the email address configured in Cisco Smart License Portal will be used as contact email address to send SCH notifications.
 contact-email-addr sch-smart-licensing@cisco.com
 profile "CiscoTAC-1"
  active
  destination transport-method http
!
!
!
!
!
!
end

R2#show ip int brief
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0/0   unassigned      YES unset  administratively down down
GigabitEthernet0/0/1   unassigned      YES unset  administratively down down
GigabitEthernet0/0/2   unassigned      YES unset  administratively down down
GigabitEthernet0/0/3   unassigned      YES unset  administratively down down
Serial0/1/0            1.1.1.2         YES manual up                    up
Serial0/1/1            1.1.1.5         YES manual up                    up
Loopback1              10.10.10.1      YES manual up                    up
Loopback2              10.10.10.65     YES manual up                    up
Loopback3              10.10.10.161    YES manual up                    up
Loopback4              172.16.4.1      YES manual up                    up

R2#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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       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
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is 1.1.1.6 to network 0.0.0.0

D*EX  0.0.0.0/0 [170/3139840] via 1.1.1.6, 00:39:41, Serial0/1/1
      1.0.0.0/8 is variably subnetted, 4 subnets, 2 masks
C        1.1.1.0/30 is directly connected, Serial0/1/0
L        1.1.1.2/32 is directly connected, Serial0/1/0
C        1.1.1.4/30 is directly connected, Serial0/1/1
L        1.1.1.5/32 is directly connected, Serial0/1/1
      10.0.0.0/8 is variably subnetted, 6 subnets, 4 masks
C        10.10.10.0/26 is directly connected, Loopback1
L        10.10.10.1/32 is directly connected, Loopback1
C        10.10.10.64/27 is directly connected, Loopback2
L        10.10.10.65/32 is directly connected, Loopback2
C        10.10.10.160/28 is directly connected, Loopback3
L        10.10.10.161/32 is directly connected, Loopback3
      172.16.0.0/16 is variably subnetted, 6 subnets, 2 masks
C        172.16.4.0/24 is directly connected, Loopback4
L        172.16.4.1/32 is directly connected, Loopback4
D        172.16.10.0/24 [90/3012096] via 1.1.1.1, 00:29:39, Serial0/1/0
D        172.16.20.0/24 [90/3012096] via 1.1.1.1, 00:29:39, Serial0/1/0
D        172.16.30.0/24 [90/3012096] via 1.1.1.1, 00:29:39, Serial0/1/0
D        172.16.99.0/24 [90/3012096] via 1.1.1.1, 00:29:39, Serial0/1/0
D     192.168.11.0/24 [90/3139840] via 1.1.1.1, 00:49:01, Serial0/1/0
D     192.168.12.0/24 [90/3139840] via 1.1.1.1, 00:49:01, Serial0/1/0
D     192.168.13.0/24 [90/3139840] via 1.1.1.1, 00:49:01, Serial0/1/0


R1 -  show run
R1#show run
Building configuration...

Current configuration : 7168 bytes
!
! Last configuration change at 15:08:46 UTC Mon Jan 19 2026
!
version 17.6
service timestamps debug datetime msec
service timestamps log datetime msec
! Call-home is enabled by Smart-Licensing.
service call-home
platform qfp utilization monitor load 80
platform punt-keepalive disable-kernel-core
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
no ip domain lookup
ip dhcp excluded-address 172.16.10.1 172.16.10.11
ip dhcp excluded-address 172.16.20.1 172.16.20.11
!
ip dhcp pool Academics
 network 172.16.10.0 255.255.255.0
 default-router 172.16.10.1
 dns-server 1.1.1.1
!
ip dhcp pool Students
 network 172.16.20.0 255.255.255.0
 dns-server 1.1.1.1
 default-router 172.16.20.1
!
!
!
login on-success log
!
!
!
!
!
!
!
subscriber templating
multilink bundle-name authenticated
!
!
!
crypto pki trustpoint TP-self-signed-1344490233
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-1344490233
 revocation-check none
 rsakeypair TP-self-signed-1344490233
!
crypto pki trustpoint SLA-TrustPoint
 enrollment pkcs12
 revocation-check crl
!
!
crypto pki certificate chain TP-self-signed-1344490233
 certificate self-signed 01
  30820330 30820218 A0030201 02020101 300D0609 2A864886 F70D0101 05050030
  31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
  69666963 6174652D 31333434 34393032 3333301E 170D3236 30313139 31323331
  35305A17 0D333630 31313931 32333135 305A3031 312F302D 06035504 03132649
  4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 33343434
  39303233 33308201 22300D06 092A8648 86F70D01 01010500 0382010F 00308201
  0A028201 0100F18A 5DCAB66B 1ACF00AB 505E6B06 5D6C4B29 59054ABB DA0BBCB4
  D528671A ACCDE0A2 2EED76E9 5F3806F8 4015D24E 77AA407A 94352CAA F5C20257
  4F5B3A58 910F45D4 570EA92A 939DE048 B1A10A9C C59041B0 D2E7306D 080B841F
  A3D6262A BD537B34 7C03A844 D899639D 8A2B59D6 644DEE28 5746AFD3 7BE3CF8A
  C377A551 36F3E844 8AE93932 7CD500AA 16769DA1 F8A22DD1 29538753 1E1BD92A
  EC9E5756 5D1565DB 68D1A221 890878A2 DC357EBC 38F818AC 6F13C430 26EAD216
  A7A152A9 49B2E3D2 455A50AD 02D74FC2 7E734B71 BACB952D C0C94D21 07E0E6A2
  5CF7E435 08A28813 19580230 3EE99476 3279E98B 2827BA17 F4A82879 43B4D075
  A187573F B4230203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF
  301F0603 551D2304 18301680 1457D3DE 758AC4CD A71A575B 680E3E24 79D1CF50
  E2301D06 03551D0E 04160414 57D3DE75 8AC4CDA7 1A575B68 0E3E2479 D1CF50E2
  300D0609 2A864886 F70D0101 05050003 82010100 BBB8A880 D81FA6FD 8C70550C
  1441CAD7 D460348B 8BDCF7A2 F44BE34F BB2B5E5C C7301FD4 CDF28A6A 9A1FBD20
  E19112B5 673EF1EA 0379939C 90F04135 278B7959 290E0CBC DD10DC3C 9F6817B9
  AADE3227 08E63571 D125742F B4B103ED D4B63CAD 6603AECC 1BEB800D E48ECD08
  4905D4A2 865E71CE BBEC193F 672DF69A 6176BE24 43C0EF1D 3F110F18 538D89C7
  7B48C35F 624E3C24 F1748AA8 B5C57312 D9A427A5 FA288AD1 B309BD3C A41C62FB
  4C8DE447 EB7467EC B1ADCF17 06C610BC 4E6CC438 A286BF90 C7285421 0BA5E055
  9152D988 7055DA12 6853AED7 19BE1FFC 828067E7 FBF422D8 8561CB88 26D31624
  075B2639 50861BBB 57155C6D 5FE7BF5F 5CDE710E
        quit
crypto pki certificate chain SLA-TrustPoint
 certificate ca 01
  30820321 30820209 A0030201 02020101 300D0609 2A864886 F70D0101 0B050030
  32310E30 0C060355 040A1305 43697363 6F312030 1E060355 04031317 43697363
  6F204C69 63656E73 696E6720 526F6F74 20434130 1E170D31 33303533 30313934
  3834375A 170D3338 30353330 31393438 34375A30 32310E30 0C060355 040A1305
  43697363 6F312030 1E060355 04031317 43697363 6F204C69 63656E73 696E6720
  526F6F74 20434130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030
  82010A02 82010100 A6BCBD96 131E05F7 145EA72C 2CD686E6 17222EA1 F1EFF64D
  CBB4C798 212AA147 C655D8D7 9471380D 8711441E 1AAF071A 9CAE6388 8A38E520
  1C394D78 462EF239 C659F715 B98C0A59 5BBB5CBD 0CFEBEA3 700A8BF7 D8F256EE
  4AA4E80D DB6FD1C9 60B1FD18 FFC69C96 6FA68957 A2617DE7 104FDC5F EA2956AC
  7390A3EB 2B5436AD C847A2C5 DAB553EB 69A9A535 58E9F3E3 C0BD23CF 58BD7188
  68E69491 20F320E7 948E71D7 AE3BCC84 F10684C7 4BC8E00F 539BA42B 42C68BB7
  C7479096 B4CB2D62 EA2F505D C7B062A4 6811D95B E8250FC4 5D5D5FB8 8F27D191
  C55F0D76 61F9A4CD 3D992327 A8BB03BD 4E6D7069 7CBADF8B DF5F4368 95135E44
  DFC7C6CF 04DD7FD1 02030100 01A34230 40300E06 03551D0F 0101FF04 04030201
  06300F06 03551D13 0101FF04 05300301 01FF301D 0603551D 0E041604 1449DC85
  4B3D31E5 1B3E6A17 606AF333 3D3B4C73 E8300D06 092A8648 86F70D01 010B0500
  03820101 00507F24 D3932A66 86025D9F E838AE5C 6D4DF6B0 49631C78 240DA905
  604EDCDE FF4FED2B 77FC460E CD636FDB DD44681E 3A5673AB 9093D3B1 6C9E3D8B
  D98987BF E40CBD9E 1AECA0C2 2189BB5C 8FA85686 CD98B646 5575B146 8DFC66A8
  467A3DF4 4D565700 6ADF0F0D CF835015 3C04FF7C 21E878AC 11BA9CD2 55A9232C
  7CA7B7E6 C1AF74F6 152E99B7 B1FCF9BB E973DE7F 5BDDEB86 C71E3B49 1765308B
  5FB0DA06 B92AFE7F 494E8A9E 07B85737 F3A58BE1 1A48A229 C37C1E69 39F08678
  80DDCD16 D6BACECA EEBC7CF9 8428787B 35202CDC 60E4616A B623CDBD 230E3AFB
  418616A9 4093E049 4D10AB75 27E86F73 932E35B5 8862FDAE 0275156F 719BB2F0
  D697DF7F 28
        quit
!
!
license udi pid C8200L-1N-4T sn FGL2725L1NM
memory free low-watermark processor 67482
!
diagnostic bootup level minimal
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
!
!
!
!
!
!
interface Loopback11
 ip address 192.168.11.1 255.255.255.0
!
interface Loopback12
 ip address 192.168.12.1 255.255.255.0
!
interface Loopback13
 ip address 192.168.13.1 255.255.255.0
!
interface GigabitEthernet0/0/0
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/1
 no ip address
 negotiation auto
!
interface GigabitEthernet0/0/1.10
 encapsulation dot1Q 10
 ip address 172.16.10.1 255.255.255.0
!
interface GigabitEthernet0/0/1.20
 encapsulation dot1Q 20
 ip address 172.16.20.1 255.255.255.0
!
interface GigabitEthernet0/0/1.30
 encapsulation dot1Q 30
 ip address 172.16.30.1 255.255.255.0
!
interface GigabitEthernet0/0/1.99
 encapsulation dot1Q 99
 ip address 172.16.99.1 255.255.255.0
!
interface GigabitEthernet0/0/2
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/0/3
 no ip address
 shutdown
 negotiation auto
!
interface Serial0/1/0
 bandwidth 1024
 ip address 1.1.1.1 255.255.255.252
!
interface Serial0/1/1
 no ip address
 shutdown
!
!
router eigrp 100
 network 0.0.0.0
 passive-interface GigabitEthernet0/0/1.10
 passive-interface GigabitEthernet0/0/1.20
 passive-interface GigabitEthernet0/0/1.30
 passive-interface GigabitEthernet0/0/1.99
 passive-interface Loopback11
 passive-interface Loopback12
 passive-interface Loopback13
!
ip http server
ip http authentication local
ip http secure-server
ip forward-protocol nd
!
!
!
!
!
!
control-plane
!
!
line con 0
 stopbits 1
line aux 0
line vty 0 4
 login
 transport input ssh
line vty 5 14
 login
 transport input ssh
!
call-home
 ! If contact email address in call-home is configured as sch-smart-licensing@cisco.com
 ! the email address configured in Cisco Smart License Portal will be used as contact email address to send SCH notifications.
 contact-email-addr sch-smart-licensing@cisco.com
 profile "CiscoTAC-1"
  active
  destination transport-method http
!
!
!
!
!
!
end

R1#show ip int brief
Interface              IP-Address      OK? Method Status                Protocol
GigabitEthernet0/0/0   unassigned      YES unset  administratively down down
GigabitEthernet0/0/1   unassigned      YES unset  up                    up
Gi0/0/1.10             172.16.10.1     YES manual up                    up
Gi0/0/1.20             172.16.20.1     YES manual up                    up
Gi0/0/1.30             172.16.30.1     YES manual up                    up
Gi0/0/1.99             172.16.99.1     YES manual up                    up
GigabitEthernet0/0/2   unassigned      YES unset  administratively down down
GigabitEthernet0/0/3   unassigned      YES unset  administratively down down
Serial0/1/0            1.1.1.1         YES manual down                  down
Serial0/1/1            unassigned      YES unset  administratively down down
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, m - OMP
       n - NAT, Ni - NAT inside, No - NAT outside, Nd - NAT DIA
       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
       H - NHRP, G - NHRP registered, g - NHRP registration summary
       o - ODR, P - periodic downloaded static route, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR
       & - replicated local route overrides by connected

Gateway of last resort is not set

      172.16.0.0/16 is variably subnetted, 8 subnets, 2 masks
C        172.16.10.0/24 is directly connected, GigabitEthernet0/0/1.10
L        172.16.10.1/32 is directly connected, GigabitEthernet0/0/1.10
C        172.16.20.0/24 is directly connected, GigabitEthernet0/0/1.20
L        172.16.20.1/32 is directly connected, GigabitEthernet0/0/1.20
C        172.16.30.0/24 is directly connected, GigabitEthernet0/0/1.30
L        172.16.30.1/32 is directly connected, GigabitEthernet0/0/1.30
C        172.16.99.0/24 is directly connected, GigabitEthernet0/0/1.99
L        172.16.99.1/32 is directly connected, GigabitEthernet0/0/1.99
      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

S1 - show run

S1#show run
Building configuration...

Current configuration : 2739 bytes
!
! Last configuration change at 15:10:35 UTC Mon Jan 19 2026
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
switch 1 provision c1000-24t-4g-l
system mtu routing 1500
!
!
no ip domain-lookup
!
!
!
!
!
!
!
!
spanning-tree mode rapid-pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
interface Port-channel1
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
!
interface GigabitEthernet1/0/1
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
 channel-protocol pagp
 channel-group 1 mode desirable
!
interface GigabitEthernet1/0/2
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
 channel-protocol pagp
 channel-group 1 mode desirable
!
interface GigabitEthernet1/0/3
 switchport access vlan 10
!
interface GigabitEthernet1/0/4
 switchport access vlan 10
!
interface GigabitEthernet1/0/5
 switchport access vlan 10
!
interface GigabitEthernet1/0/6
 switchport access vlan 10
!
interface GigabitEthernet1/0/7
 switchport access vlan 10
!
interface GigabitEthernet1/0/8
 switchport access vlan 10
!
interface GigabitEthernet1/0/9
 switchport access vlan 10
!
interface GigabitEthernet1/0/10
 switchport access vlan 10
!
interface GigabitEthernet1/0/11
 switchport access vlan 10
!
interface GigabitEthernet1/0/12
 switchport access vlan 20
!
interface GigabitEthernet1/0/13
 switchport access vlan 20
!
interface GigabitEthernet1/0/14
 switchport access vlan 20
!
interface GigabitEthernet1/0/15
 switchport access vlan 20
!
interface GigabitEthernet1/0/16
 switchport access vlan 20
!
interface GigabitEthernet1/0/17
 switchport access vlan 20
!
interface GigabitEthernet1/0/18
 switchport access vlan 20
!
interface GigabitEthernet1/0/19
 switchport access vlan 30
!
interface GigabitEthernet1/0/20
 switchport access vlan 30
!
interface GigabitEthernet1/0/21
 switchport access vlan 30
!
interface GigabitEthernet1/0/22
 switchport access vlan 30
!
interface GigabitEthernet1/0/23
 switchport access vlan 30
!
interface GigabitEthernet1/0/24 (this was used as the interface for the router)
 switchport access vlan 30
 switchport trunk allowed vlan 1,10,20,30,99
 switchport mode trunk
!
interface GigabitEthernet1/0/25
!
interface GigabitEthernet1/0/26
!
interface GigabitEthernet1/0/27
!
interface GigabitEthernet1/0/28
!
interface Vlan1
 no ip address
!
interface Vlan20
 no ip address
!
ip http server
ip http secure-server
!
!
!
!
line con 0
line vty 5 15
!
end

S1#
*Jan 19 15:37:17.785: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
*Jan 19 15:37:18.780: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/24, changed state to down
*Jan 19 15:37:19.782: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/24, changed state to downshow ip int brief
Interface              IP-Address      OK? Method Status                Protocol
Vlan1                  unassigned      YES unset  up                    down
Vlan20                 unassigned      YES unset  up                    up
GigabitEthernet1/0/1   unassigned      YES unset  up                    up
GigabitEthernet1/0/2   unassigned      YES unset  up                    up
GigabitEthernet1/0/3   unassigned      YES unset  down                  down
GigabitEthernet1/0/4   unassigned      YES unset  down                  down
GigabitEthernet1/0/5   unassigned      YES unset  down                  down
GigabitEthernet1/0/6   unassigned      YES unset  up                    up
GigabitEthernet1/0/7   unassigned      YES unset  down                  down
GigabitEthernet1/0/8   unassigned      YES unset  down                  down
GigabitEthernet1/0/9   unassigned      YES unset  down                  down
GigabitEthernet1/0/10  unassigned      YES unset  down                  down
GigabitEthernet1/0/11  unassigned      YES unset  down                  down
GigabitEthernet1/0/12  unassigned      YES unset  down                  down
GigabitEthernet1/0/13  unassigned      YES unset  down                  down
GigabitEthernet1/0/14  unassigned      YES unset  down                  down
GigabitEthernet1/0/15  unassigned      YES unset  down                  down
GigabitEthernet1/0/16  unassigned      YES unset  down                  down
GigabitEthernet1/0/17  unassigned      YES unset  down                  down
GigabitEthernet1/0/18  unassigned      YES unset  down                  down
GigabitEthernet1/0/19  unassigned      YES unset  down                  down
GigabitEthernet1/0/20  unassigned      YES unset  down                  down
GigabitEthernet1/0/21  unassigned      YES unset  down                  down
GigabitEthernet1/0/22  unassigned      YES unset  down                  down
GigabitEthernet1/0/23  unassigned      YES unset  down                  down
GigabitEthernet1/0/24  unassigned      YES unset  down                  down
GigabitEthernet1/0/25  unassigned      YES unset  down                  down
GigabitEthernet1/0/26  unassigned      YES unset  down                  down
GigabitEthernet1/0/27  unassigned      YES unset  down                  down
GigabitEthernet1/0/28  unassigned      YES unset  down                  down
Port-channel1          unassigned      YES unset  up                    up

S1#
*Jan 19 15:37:47.721: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/24, changed state to up
*Jan 19 15:37:49.783: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/24, changed state to upshow etherchannel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator

        M - not in use, minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

        A - formed by Auto LAG


Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)         PAgP      Gi1/0/1(P)  Gi1/0/2(P)

S1#show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi1/0/25, Gi1/0/26, Gi1/0/27
                                                Gi1/0/28
10   Academics                        active    Gi1/0/3, Gi1/0/4, Gi1/0/5
                                                Gi1/0/6, Gi1/0/7, Gi1/0/8
                                                Gi1/0/9, Gi1/0/10, Gi1/0/11
20   Students                         active    Gi1/0/12, Gi1/0/13, Gi1/0/14
                                                Gi1/0/15, Gi1/0/16, Gi1/0/17
                                                Gi1/0/18
30   Guests                           active    Gi1/0/19, Gi1/0/20, Gi1/0/21
                                                Gi1/0/22, Gi1/0/23
99   Management/Native                active
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

S1#show interfaces trunk

Port        Mode             Encapsulation  Status        Native vlan
Gi1/0/24    on               802.1q         trunking      1
Po1         on               802.1q         trunking      99

Port        Vlans allowed on trunk
Gi1/0/24    1,10,20,30,99
Po1         10,20,30,99

Port        Vlans allowed and active in management domain
Gi1/0/24    1,10,20,30,99
Po1         10,20,30,99

Port        Vlans in spanning tree forwarding state and not pruned
Gi1/0/24    1,10,20,30,99
Po1         10,20,30,99

S2#show run
Building configuration...

Current configuration : 2651 bytes
!
! Last configuration change at 14:37:51 UTC Mon Jan 19 2026
!
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname S2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
switch 1 provision c1000-24t-4g-l
system mtu routing 1500
!
!
!
!
!
!
!
!
!
!
spanning-tree mode rapid-pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
interface Port-channel1
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
!
interface GigabitEthernet1/0/1
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
 channel-protocol pagp
 channel-group 1 mode desirable
!
interface GigabitEthernet1/0/2
 switchport trunk allowed vlan 10,20,30,99
 switchport trunk native vlan 99
 switchport mode trunk
 switchport nonegotiate
 channel-protocol pagp
 channel-group 1 mode desirable
!
interface GigabitEthernet1/0/3
 switchport access vlan 10
!
interface GigabitEthernet1/0/4
 switchport access vlan 10
!
interface GigabitEthernet1/0/5
 switchport access vlan 10
!
interface GigabitEthernet1/0/6
 switchport access vlan 10
!
interface GigabitEthernet1/0/7
 switchport access vlan 10
!
interface GigabitEthernet1/0/8
 switchport access vlan 10
!
interface GigabitEthernet1/0/9
 switchport access vlan 10
!
interface GigabitEthernet1/0/10
 switchport access vlan 10
!
interface GigabitEthernet1/0/11
 switchport access vlan 10
!
interface GigabitEthernet1/0/12
 switchport access vlan 20
!
interface GigabitEthernet1/0/13
 switchport access vlan 20
!
interface GigabitEthernet1/0/14
 switchport access vlan 20
!
interface GigabitEthernet1/0/15
 switchport access vlan 20
!
interface GigabitEthernet1/0/16
 switchport access vlan 20
!
interface GigabitEthernet1/0/17
 switchport access vlan 20
!
interface GigabitEthernet1/0/18
 switchport access vlan 20
!
interface GigabitEthernet1/0/19
 switchport access vlan 30
!
interface GigabitEthernet1/0/20
 switchport access vlan 30
!
interface GigabitEthernet1/0/21
 switchport access vlan 30
!
interface GigabitEthernet1/0/22
 switchport access vlan 30
!
interface GigabitEthernet1/0/23
 switchport access vlan 30
!
interface GigabitEthernet1/0/24
 switchport access vlan 30
!
interface GigabitEthernet1/0/25
!
interface GigabitEthernet1/0/26
!
interface GigabitEthernet1/0/27
!
interface GigabitEthernet1/0/28
!
interface Vlan1
 no ip address
!
interface Vlan20
 no ip address
!
ip http server
ip http secure-server
!
!
!
!
line con 0
line vty 5 15
!
end

S2#
*Jan 19 15:38:48.316: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/1, changed state to up
*Jan 19 15:38:48.616: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/2, changed state to up
*Jan 19 15:38:55.944: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).
*Jan 19 15:38:55.944: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).
*Jan 19 15:38:56.544: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/2, changed state to up
*Jan 19 15:38:56.615: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/1, changed state to up
*Jan 19 15:38:56.943: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).
*Jan 19 15:38:56.943: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).
*Jan 19 15:38:57.945: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).
*Jan 19 15:38:57.945: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).
*Jan 19 15:38:58.944: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).
*Jan 19 15:38:58.945: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).
S2#
*Jan 19 15:38:59.944: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).
*Jan 19 15:38:59.945: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).show ip int brief
Interface              IP-Address      OK? Method Status                Protocol
Vlan1                  unassigned      YES unset  up                    down
Vlan20                 unassigned      YES unset  up                    up
GigabitEthernet1/0/1   unassigned      YES unset  up                    up
GigabitEthernet1/0/2   unassigned      YES unset  up                    up
GigabitEthernet1/0/3   unassigned      YES unset  down                  down
GigabitEthernet1/0/4   unassigned      YES unset  down                  down
GigabitEthernet1/0/5   unassigned      YES unset  down                  down
GigabitEthernet1/0/6   unassigned      YES unset  down                  down
GigabitEthernet1/0/7   unassigned      YES unset  down                  down
GigabitEthernet1/0/8   unassigned      YES unset  down                  down
GigabitEthernet1/0/9   unassigned      YES unset  down                  down
GigabitEthernet1/0/10  unassigned      YES unset  down                  down
GigabitEthernet1/0/11  unassigned      YES unset  down                  down
GigabitEthernet1/0/12  unassigned      YES unset  up                    up
GigabitEthernet1/0/13  unassigned      YES unset  down                  down
GigabitEthernet1/0/14  unassigned      YES unset  down                  down
GigabitEthernet1/0/15  unassigned      YES unset  down                  down
GigabitEthernet1/0/16  unassigned      YES unset  down                  down
GigabitEthernet1/0/17  unassigned      YES unset  down                  down
GigabitEthernet1/0/18  unassigned      YES unset  down                  down
GigabitEthernet1/0/19  unassigned      YES unset  down                  down
GigabitEthernet1/0/20  unassigned      YES unset  down                  down
GigabitEthernet1/0/21  unassigned      YES unset  down                  down
GigabitEthernet1/0/22  unassigned      YES unset  down                  down
GigabitEthernet1/0/23  unassigned      YES unset  down                  down
GigabitEthernet1/0/24  unassigned      YES unset  down                  down
GigabitEthernet1/0/25  unassigned      YES unset  down                  down
GigabitEthernet1/0/26  unassigned      YES unset  down                  down
GigabitEthernet1/0/27  unassigned      YES unset  down                  down
GigabitEthernet1/0/28  unassigned      YES unset  down                  down
Port-channel1          unassigned      YES unset  down                  down

S2#
*Jan 19 15:39:26.322: %SW_MATM-4-MACFLAP_NOTIF: Host c46e.1f06.1741 in vlan 99 is flapping between port Gi1/0/1 and port Gi1/0/2
*Jan 19 15:39:29.571: %SW_MATM-4-MACFLAP_NOTIF: Host c46e.1f06.1741 in vlan 99 is flapping between port Gi1/0/2 and port Gi1/0/1show ether
*Jan 19 15:39:34.853: %SW_MATM-4-MACFLAP_NOTIF: Host e438.7e91.9741 in vlan 99 is flapping between port Gi1/0/1 and port Gi1/0/2channel summary
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      N - not in use, no aggregation
        f - failed to allocate aggregator

        M - not in use, minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

        A - formed by Auto LAG


Number of channel-groups in use: 1
Number of aggregators:           1

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SD)         PAgP      Gi1/0/1(I)  Gi1/0/2(I)


S2#
*Jan 19 15:39:51.969: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/2 (99), with Switch GigabitEthernet1/0/2 (1).show vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi1/0/25, Gi1/0/26, Gi1/0/27
                                                Gi1/0/28
10   Academics                        active    Gi1/0/3, Gi1/0/4, Gi1/0/5
                                                Gi1/0/6, Gi1/0/7, Gi1/0/8
                                                Gi1/0/9, Gi1/0/10, Gi1/0/11
20   Stude
*Jan 19 15:39:53.450: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on GigabitEthernet1/0/1 (99), with Switch GigabitEthernet1/0/1 (1).nts                         active    Gi1/0/12, Gi1/0/13, Gi1/0/14
                                                Gi1/0/15, Gi1/0/16, Gi1/0/17
                                                Gi1/0/18
30   Guests                           active    Gi1/0/19, Gi1/0/20, Gi1/0/21
                                                Gi1/0/22, Gi1/0/23, Gi1/0/24
99   Management/Native                active
1002 fddi-default                     act/unsup
1003 token-ring-default               act/unsup
1004 fddinet-default                  act/unsup
1005 trnet-default                    act/unsup

show interfaces trunk
Port        Mode             Encapsulation  Status        Native vlan
Gi1/0/1     on               802.1q         trunking      99
Gi1/0/2     on               802.1q         trunking      99

Port        Vlans allowed on trunk
Gi1/0/1     10,20,30,99
Gi1/0/2     10,20,30,99

Port        Vlans allowed and active in management domain
Gi1/0/1     10,20,30,99
Gi1/0/2     10,20,30,99

Port        Vlans in spanning tree forwarding state and not pruned
Gi1/0/1     10,20,30,99
Gi1/0/2     10,20,30,99




