Can anyone please tell me whether they know if the Cisco 850's support configuring different LAN IP subnets, per FastEthernet switch port? I worked with a Cisco 837 which couldn't (although enabling the DMZ functionality did give extra segment).
PS. If it can't, how about the Cisco 870's?-
Here is a link to the config guide for 850/870 routers.
Basically, what you need to do is to
1. create the vlan database
2. create layer 2 vlans
router1(config)#vlan 2 name network_mgmt
router1(config)#vlan 3 name data
router1(config)#vlan 4 name voice
3. Assign L2 vlans to a port on the switch.
switchport access vlan 2
switchport access vlan 3
switchport access vlan 4
4. create layer 3 vlan interfaces for routing.
int vlan 2
ip address 192.168.2.254 255.255.255.0
int vlan 3
ip address 192.168.3.254 255.255.255.0
int vlan 4
ip address 192.168.4.254 255.255.255.0
Hope this helps :)