Trunking between Cisco 1800 router and Cisco Catalyst 2960 switch

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http://serverfault.com – I would like to establish trunk between Cisco router 1812 and Catalyst 2960 switch. What I would like to have is that router gets ip address on his fe0 interface and on fe2 provides trunk with 3 VLANs with DHCP server all NAT-ed to fe0. Here is my shortened current config for with vlan: VLAN 20 ROUTER ! DHCP pool for VLAN-20 ip dhcp pool vlan20 network domain-name emergency.lu default-router dns-server ! ! this interface provides internet access interface FastEthernet0 ip address dhcp ip nat outside ip virtual-reasse (HowTos)