NAT device

[Mahmoud El-sharif]

we have A wireless link (pre-wimax) that provide me with 2 Mb internet connection (tagged Ethernet frames) and we have 6 real IP what i need now is what is the best and cheapest device to do NAT and DHCP to allow users to access the internet , i am trying to do this using Cisco AP 1141 and the link is working fine with static ip configuration on my lap (give my wireless NIC real IP) but now i just need device to do NAT and DHCP

my suggestion is can i use  Cisco 861W to do this function

any help will be appreciated

[Edison Ortiz]

Yes, you can use the 861W router.

[Mahmoud El-sharif]

Thanks Edison for your help

and kindly advice on those questions below and the below scenario

1-is the WAN port on this router support tagged ethernet frames ??? or even untagged frames

2-is the 4 ports on the router can be used as WAN or LAN ???

3- can i give this router WAN interface one of those public IPs and give the rest of those IPs statically to other devices on the network

WAN Interface to the pre-wimax device-----------2nd 10/100 port----------Router----------1st 10/100 port ------LAN interface users (DHCP )

NAT on router to translate from private IPs on LAN interface  to public IPs on WAN interface

thanks in advance

[Edison Ortiz]

1) The typical configuration for the WAN port is a routed port but I believe you can also configure subinterfaces which alllows for the tag frame support.

2) LAN

3) Yes

http://www.cisco.com/en/US/docs/routers/access/800/860-880-890/software/configuration/guide/SCG880-860.html

[Mahmoud El-sharif]

Hi Edison,

     Thanks for your help and support , could you please confirm the availability of the WAN port to deal with tagged ethernet frames

Thanks in advance