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InterVLAN Routing

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   [Router]
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  {Trunk Link}
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    [Switch]
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    "nodes"

Router on a stick

One Cable from our router to a switch

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   [Router]
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  {Trunk Link}

Configure

Things are getting complicated so no ascii art :(

  • Switch 1 

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    en
conf t
int f0/1 
switchport mode trunk
switchport mode trunk allowed vlan 10,20

  • RouterA 

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    en
conf t
int f0/0
no shut
int f0/0.10

encapsulation dot1Q 10
# to enable IEEE 802.1Q encapsulation of traffic on a specified subinterface

ip address 10.0.0.1 255.255.255.0
no shut

int f0/0.20
encapsulation dot1Q 20
ip address 172.16.0.1 255.255.255.0
no shut
exit
exit

show ip route
show ip int bri