> Basically, a client of his has two locations. They want to run a T1 between > the locations, and then from one office run a T1 connection to the Internet. > Unfortunately, he know nothing about routers. I couldn't quite gather from your message the purpous of the Linux boxes in the picture. You'll still need a router with a T-1 interface at each site. (Details on Linux T-1 routers below...) So at the site with the single T-1, you'll need a T-1 router, like a cisco 16xx, 17xx, 25xx or 26xx (and possibly a CSU/DSU depending on what kind of crisco you buy). The cisco will have an ethernet interface and a T-1 interface. You'd have to get the IP information from your ISP, but a typical configuration would be to have a seperate block of IP's for each site, as well as a /30 (block of 2 usable IP's) for the private T-1 link, and another /30 that your ISP will assign you for the host site's T-1 link to the internet. As far as the routing goes, by far the easiest way to do it would require only 1 static route at the host site (these are cisco commands...) besides the normal default route: Host site router: ip route 192.168.1.0 255.255.255.0 private-t1-link-ip ! The client site has 192.168.1.0/24 then set a default: ip route 0.0.0.0 0.0.0.0 internet-t1-link-ip ! Set a default route to the internet Client site router: ip route 0.0.0.0 0.0.0.0 private-t1-link-ip ! Traffic for the local network will automatically be sent out the local ! ethernet interface (does not need a route defined), since eth0 will ! have an IP on that network Now, there are companies that sell T-1 interface cards for PC's that are supported by Linux, so you don't /have/ to buy a real router. But your ISP will probably not be able to help you configure it, so support will be an issue. It would work though, Linux is able to act as a router. In fact, I know of at least a couple of companies that sell linux-based T-1 (and ATM and whatnot) routers using x86 hardware. I have no experience with them though. But with the cost of a used 2501 nowadays the money you might save on hardware probably won't be worth the extra support headaches. (You can get a 2501 (2 T-1 ports) for a few hundred bucks, and then buy a couple of cheap CSU's) Another thing to think about is the T-1 setup itself. It might be cheaper to buy a frame T-1 at the host site and have 2 PVC's, 1 to the internet and 1 to the client site. This way you're only buying 1 telco loop at the host site (it's physically 1 T-1...) So: ISP cost for frame T-1 internet access: $xxx Local frame loop at host site: ~ $300/month host site PVC's: ~ $50/month each (2 of these = $100) Client site frame loop: ~ $300/month Client site PVC to host: ~ $50/month This saves you about $300/month since you don't need 2 physical T-1's at the host site. The drawback is that you can't get full speed on both the internet T-1 and the client T-1 simultaneously, since they share the same 1.5Mbit. If they haven't purchased the internet T-1 yet, contact me off-list for pricing. We can do internet T-1's *really* cheap. _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list