Problem Interconnecting Cisco C881 with Switch SF 100

[focuux]

I recently install a router Cisco C881, I configured DHCP correctly and when I'm connected directly to the router, everything works ok, even the ip it assigned to my pc it's within the range. The problem comes when I'm connecting through the switch,network stop working and I can not enter to internet. Also, the ip's and subnet mask it assigned to me are not correct. Hope you can help me.

PD. The switch I'm using is SF 100

[chrihussey]

Both these devices have 10/100 interfaces. Did you connect them using an Ethernet crossover cable? That might be the issue.