version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
!
no aaa new-model
vtp domain CATIZA
vtp mode transparent
ip subnet-zero
!
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan 2
!
interface FastEthernet0/1
!
interface FastEthernet0/2
!
interface FastEthernet0/3
!
interface FastEthernet0/4
!
interface FastEthernet0/5
!
interface FastEthernet0/6
!
interface FastEthernet0/7
!
interface FastEthernet0/8
!
interface FastEthernet0/9

.... you see the point

interface FastEthernet0/48
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface GigabitEthernet0/3
!
interface GigabitEthernet0/4
!
interface Vlan1
 no ip address
!
interface Vlan2
 ip address 192.168.21.3 255.255.255.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.21.2
ip route 192.168.21.0 255.255.255.0 192.168.21.2
ip http server
ip http secure-server
!
interface Vlan1
 no ip address
!
interface Vlan2
 ip address 192.168.21.3 255.255.255.0
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.21.2
ip route 192.168.21.0 255.255.255.0 192.168.21.2
ip http server
ip http secure-server
!
!
control-plane
!
!
line con 0
line vty 5 15
!
!
end