I need to get an internet T1 working temporarily on a Cisco 1721 with a WIC 1 DSUCSU card. This router is already in use in a P2P T1 connection to a second site using S0. I installed a second T1 card into S1 slot to be used for the internet T1.
I"m not worried about a firewall at this point. eventually I"m going to set it up with an external firewall and a second T1 router. But for now....I don't even mind if my LAN device has a public address, but would rather use a static NAT so I don't have to change IP addressing on the LAN devices. This setup is only going to be used for a single video conference call.
Here's my configs: Site A is the host site with the Internet T1 (I haven't configured S1 yet). I need public IP (or a one to one NAT) to a device at Site A and a second public IP for a Device at Site B.
With these configs the P2P T1 is working but I haven't yet setup the internet T1. Here are the addresses given by the ISP. I"m mostly concerned about the routing and NAT, I can workout the line details with Qwest.
Qwest Serial: xx.ww.128.85 /30 Customer Serial xx.ww.128.86 /30 LAN IP block yy.zz.204.240 /29 (usable IP's yy.zz.204.241 - .246)
After I add the customer serial IP to the S1 interface in site A. How do I utilize the LAN IP block. Can I just use it as a NAT Pool, leaving my existing internal IP scheme? Remember I'll need to NAT to a device in site A and anothe in site B. Thanks for any help.
SITE A CONFIG:
interface FastEthernet0 description LAN in Site A ip address 192.168.51.2 255.255.255.0 speed auto no cdp enable ! interface Serial0 description P2P to SITE B ip address 10.0.5.1 255.255.255.0 service-module t1 clock source internal no cdp enable ! interface Serial1 no ip address (will add customer Serial IP here) shutdown no cdp enable ! ip classless ip route 0.0.0.0 0.0.0.0 (qwest serial IP here?) ip route 192.168.60.0 255.255.255.0 10.0.5.2 no ip http server
SITE B CONFIG:
interface FastEthernet0 description LAN in site B ip address 192.168.60.2 255.255.255.0 speed auto no cdp enable ! interface Serial0 description P2P to site A ip address 10.0.5.2 255.255.255.0 no cdp enable ! ip classless ip route 0.0.0.0 0.0.0.0 10.0.5.1 ip http server ! no cdp run