Cisco vlan mapping

Router# configure terminal 

Router(config)# interface gigabitethernet 5/2 

Router(config-if)# switchport vlan mapping 1649 755 

Router(config-if)# end 

Router# 

This example shows how to verify the configuration:

Router# show interface gigabitethernet 5/2 vlan mapping 

State: enabled

Original VLAN Translated VLAN

------------- ---------------

  1649           755 

Full article (cisco.com)