Question : Single VLAN on Cisco Catalyst 3550 switch and Cisco 2801 router

I'm totally new to network administration, and though I'm working my way through the CCNA curriculum, I haven't gotten this far yet:

I want to implement the network topology shown at http://img64.imageshack.us/img64/2713/netsecnet1xy9.jpg as a single VLAN.  I want to use the switch in Layer 2 mode, and use the router for actually creating the VLAN.  I also want to be able to dish out IP addresses to wireless connections via DHCP and have them stay on the same VLAN, if that makes a difference.

I'd like fully annotated configuration code (so I can go through it and use it to learn) to configure both the router and switch starting from their factory default settings.  I've been told by a friend that this is almost painfully easy to do, but I'm afraid I'm already past my networking knowledge.

Thanks!

Answer : Single VLAN on Cisco Catalyst 3550 switch and Cisco 2801 router

Need to know 1 thing: what is the function of the 2801? With only one connected interface it won't be doing anything. I would suspect that it is your gateway/firewall to the Internet?

Good news is that there is no configuration required on the 3550 switch. Factory default enables all ports, all ports in a single vlan, all layer2 functions, no layer3 functions.

Which device do you want to hand out DHCP addresses? Your server, the switch, or the router? You have choices.

Basic 2081 config:

router>enable
router#config t
router(config)#interface fast 0/0
router(config-if)#ip address 192.168.11.1 255.255.255.0
router(config-if)#no shutdown
router(config-if)#ip nat inside
router(config-if)#interface fast 0/1
router(config-if)#ip address dhcp  <== connected to cable/dsl modem
router(config-if)#no shut
router(config-if)#ip nat outside
router(config-if)#exit
router(config)#access-list 1 permit 192.168.11.0 0.0.0.255
router(config)#ip nat inside source list 1 interface fast0/1 overload
router(config)#end
router#write mem
[OK]
router#