! ! Last configuration change at 17:36:17 UTC Wed Feb 4 2026 ! version 15.1 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption service compress-config ! hostname IOU1 ! boot-start-marker boot-end-marker ! ! logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL logging buffered 50000 logging console discriminator EXCESS ! no aaa new-model no ip icmp rate-limit unreachable ! no ip cef ! ! no ip domain-lookup no ipv6 cef ipv6 multicast rpf use-bgp spanning-tree mode pvst spanning-tree extend system-id ! ! ! ! ! ! vlan internal allocation policy ascending ! ip tcp synwait-time 5 ! ! ! ! interface Ethernet0/0 switchport trunk encapsulation dot1q switchport mode trunk ! interface Ethernet0/1 switchport access vlan 10 switchport mode access ! interface Ethernet0/2 switchport access vlan 20 switchport mode access duplex auto ! interface Ethernet0/3 duplex auto ! interface Ethernet1/0 duplex auto ! interface Ethernet1/1 duplex auto ! interface Ethernet1/2 duplex auto ! interface Ethernet1/3 duplex auto ! interface Ethernet2/0 duplex auto ! interface Ethernet2/1 duplex auto ! interface Ethernet2/2 duplex auto ! interface Ethernet2/3 duplex auto ! interface Ethernet3/0 duplex auto ! interface Ethernet3/1 duplex auto ! interface Ethernet3/2 duplex auto ! interface Ethernet3/3 duplex auto ! interface Vlan1 no ip address shutdown ! ! ! no ip http server ! ! ! ! control-plane ! ! line con 0 exec-timeout 0 0 privilege level 15 logging synchronous line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous line vty 0 4 login ! end