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Go to config mode.
shut down virtual interfaces for exampe you have vlan and interface you have created in router for vlan is fa0/1..
so to shut the interface run mention below command.
inerface fastethernet fa0/1.
shut
exit
like above example shut all interfaces.
and also disable encapsulation dot1q
go to config mod an switch and type this commond
sw(config)#no ip routing
standard access-list can do it