Multiple IP addresses on the external interface on a Cisco 851

[kornakmf]

I need to set multiple IP addresses to the external interface (WAN) on a Cisco 851 router.

Any idea how to do this?

!
interface FastEthernet4
description $FW_OUTSIDE$$ETH-WAN$$ES_WAN$
ip address 66.148.16.244 255.255.252.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip nat outside
ip virtual-reassembly
ip route-cache flow
duplex auto
speed auto
!

I need to add....
66.148.16.245
66.148.16.247
66.148.16.248
66.148.16.249

Thanks

 

[brianinms]

Why do you think you need to do that?

Do you need to translate those addresses to internal hosts?


ip nat inside source static inside_address outside_address

 

[kornakmf]

I have an issue with my ISP were they require my static IP to reside on a device. If they cannot query the device, they time out the IP address after 4 hours.

NAT translation works fine if I cycle the static IP addresses from the router to get the cable modem to provision them, but after 4 hours they are released.

Thanks,
Mark

 

[brianinms]

I don't quite understand why they would do that if you are paying for the IP addresses. You can put an addition address on the interface as follows.


interface FastEthernet4
description $FW_OUTSIDE$$ETH-WAN$$ES_WAN$
ip address 66.148.16.244 255.255.252.0
ip address x.x.x.x x.x.x.x secondary

 

[kornakmf]

You rock. This should solve my problem.
I owe you a beer or 12.

Thanks,
Mark