Public IP to LAN/VLAN port

[osaid suliebi]

Dears,

i have cisco router 881 (4 lan port and 1 WAN) and i have real ip from ISP assigned to WAN port  (\30 subnet) , also i have real ip range from ISP (\29).. the question is: Can i specify one real ip from range to spesific device connected to one of lan port ?? if yes , What will be the gateway for the device connected to this port??

in the other word; can i assigen private ip to lan/vlan port and public ip (from ISP range) to the same LAN port.?

Regards

[Greg Smalley]

You can specify a real IP from the /29 range to one of your devices connected to the LAN port, however you will need to add a secondary IP on your 881 to act as the default gateway in the /29.

int <inside vlan>
 ip address <First useable /29 IP address> secondary

Your devices default gateway will be the IP address you use above as secondary on the LAN VLAN.

Regards,

-Smalley

[osaid suliebi]

Thanks Greg, the idea is to spesificy real IP to one device in my LAN (device  )

can i put the port (my device connected to it) to vlan x and do PAT to this VLAN with one real IP??