Cisco 881 Router configuration

[mkthasleem]

Hi friends

We have MPLS/VPN connection in our office and the service provider has installed one Cisco 3560 series layer 3 switch. From this device we will get 4 public ip add with mask 255.255.255.248.
Now we need a lan network and we have more than 40 computers and many ip phones in our office. So we want to give one of the ip from above as a wan ip of our newly bought cisco 881 router and from the lan we need to get the lan ip like 192.168.1.xx and we don't want dhcp enabled in the router. I tried my best to configure it.But failed. Please help me

 

[VinceWhirlwind]

The 881 needs:
public IP configured on an outside interface
2 subinterfaces configured on the inside interface
192.168.100.1/24 for DATA, VLAN 100 native
191.168.200.1/24 for VOICE, VLAN 200 dot1q
DHCP helper configured to forward DHCP requests from the VOICE VLAN to your DHCP server
default route pointing out to the ISP IP address
NAT (PAT) configured to translate 192.168... addresses to the public address