WAN- Config Questions

[heron98105]

I have just had a 10Meg ethernet turned up and I was given 2 sets of addresses. the first set is:

Wan

65.45.145.108/30

With a network side,customer side and default gateway.

I was also given:

Lan Block1

209.127.75.96/27 for our LAN block.

I am using a 3825 router and want to nat\pat everything inside the network.

Do I need to put another router (1750 with a wic-1enet) between the 3825 and the wan dmarc?

Do I put that 1750 with the "customer side address" on e/0 with a routing statement to route all traffic to the "network side address" which is the address on their device?

If so... then do I put the default gateway address of the public lan pool (209.x.x.x) on the f\0 of the 1750?

Then would I put one of the (209.x.x.x) addresses on the g 0/0 (wan side) of the 3825 and my 172.x.x.x private on the g 0/1 (lan side) of the 3825? and then add the necessary routing statments to make it all work?

Any help would be most appreciated!

Thanks

[Edison Ortiz]

I guess you have nothing better than a 1750?

Based on the limitation, I would put the 1750 between the 3825 and the WAN Dmarc, as you have a 10Mbps interface on the 1750 and you are being serviced with a 10Mpbs connection. I actually recommend getting a better router for this, though.

In addition, I recommend placing a switch between the 3845 and the 1750 so you can actually place another devices in this zone if you want to circumvent the NAT.

The 1750 will have the WAN IP and one IP from the LAN block the ISP with default gateway towards the WAN.

The 3845 will have one IP from the LAN block on the WAN facing interface and internal IP on the LAN facing interface with NAT configured. The gateway will be the LAN IP from the 1750.

HTH,

__

Edison.