trunk ports are basically allow traffic to forward using a single interface like one cable
access ports are using a lot of cable to send traffic
default mode vlan all
switch 2 g0/0 interface
switch 2 g0/1 interface which is connected to router
router 1 interface g0/0
10
20
30
are vlans
lab exercise
sw1
int range f0/1,f0/2
switch mode access
switch access vlan 10
do show vlan brief
int range f0/3,f0/4
switch mode access
switch access vlan 30
do show vlan brief
sw2
int range 0/1
switch mode access
switch access vlan 20
do show vlan brief
int range f0/3,f0/2
switch mode access
switch access vlan 10
do show vlan brief
sw1
# You have to specify the interface first
int g0/1
switchport mode trunk
switchport trunk allowed vlan 10,30
do show interfaces trunk
then use native to call this trunk
like vlan 10,30 are in a native trunk
1001 is just a random number pick any number
switch trunk native vlan 1001
sw2
int g0/1
switchport mode trunk
switchport trunk allowed vlan 10,30
switch trunk native vlan 1001
do show vlan brief
This will show the interfaces that are active in a vlan trunk
do show interfaces trunk
We have to create the vlan 30 in switch 2
so that vlan 20 can receive traffic from vlan 30 through the trunk
vlan 30
exit
do show interfaces trunk
Then we are going to configure the g0/2 which is to router
int g0/2
switch mode trunk
switchport trunk allowed vlan 10,20,30
switchport trunk native vlan 1001
do show interface trunk
ROUTERRRRRR 1
int g0/0
no shut
vlan 10 from router
int g0/0.10
encapsulation dot1q 10
ip add 10.0.0.62 255.255.255.192
vlan 20 from router
int g0/0.20
encapsulation dot1q 20
ip add 10.0.0.126 255.255.255.192
vlan 30 from router
int g0/0.30
encapsulation dot1q 30
ip add 10.0.0.190 255.255.255.192
