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Configure the link between SW2 and R6 as an 802.1q trunk link. Using the subinterfaces listed in the diagram configure R6 to route traffic for both VLANs 67 and 146 on its Ethernet link.

SW2(config)#vlan 67,146
SW2(config)#int Fa 0/6
SW2(config-if)#switchport trunk encapsulation dot1q 
SW2(config-if)#switchport mode  trunk 
SW2(config-if)#end

R6(config)#int Fa 1/0.67
R6(config-subif)#encapsulation dot1Q 67
R6(config-subif)#ip address 155.1.67.6 255.255.255.0
R6(config-subif)#exit
R6(config)#int Fa 1/0.146                     
R6(config-subif)#encapsulation dot1Q 146            
R6(config-subif)#ip address 155.1.146.6 255.255.255.0
R6(config-subif)#exit
R6(config)#end

Verify that R6 has reachability to devices both on VLAN 67 and 146.