Dan, you cleared a lot of things up for me. Not, that I know now all these things about IP numbers, but it lifted to a great extent this cloud of mystery around these strange numbers, especially the ones being almost in sequence for the three computers I have.
Marta On May 13, 2006, at 22:49, Dan Crutcher wrote: > Before we go any further, let's make sure we're talking about the same > IP numbers.? > > 1. There is an IP number assigned by your Internet Service Provider, > often called the WAN (Wide Area Network) IP number. If you have two > providers, as you apparently do, you would have two WAN IPs ? one for > Cable and one for DSL. Assuming you have connected one of your routers > to the Cable connection and one to the DSL connection, there should > not be any conflict with the WAN IPs ? each would necessarily be > different. > > 2. Then there are the IP numbers used by your router(s). Let's call > these the LAN (Local Area Network) Router IPs. It looks as if Apple's > Airport uses the IP number 10.1.1.1 as the default for its routers > (most non-Apple wireless routers use 192.168.1.1 or something similar > as Router IPs).? > > 3. And then there are the IP numbers assigned by your router to the > computers (or other devices) it finds. These will be in the same range > as the Router IP ? so that, if your router has the IP 10.1.1.1, it > will assign IPs to local devices of 10.1.1.2, 10.1.1.3, etc. (assuming > you are using DHCP and NAT to assign IPs to local devices). > > I think the fact that you have two wireless routers presumably trying > to share the same LAN Router IP of 10.1.1.1 is the source of your > problems. I have a situation where I have two routers providing DHCP > to devices on the same network ? one is wired, the other wireless ? > and I had to change the wireless Router IP to something different than > the wired one. (Both were set by default to use 192.168.1.1.? I was > able to use the router's built-in Web interface to change one of them > to 192.168.2.1 and that allowed me to use both on the same network.) > > I think you will need to do something similar with one of the Airport > routers. I've never used its Web interface, so I don't what it's > settings look like, but I suspect there will be a way to change one of > the routers to, say, 10.1.2.1, so that it will then assign its DHCP > addresses in the 10.1.2.x range while the other assigns them in the > 10.1.1.x range. You will almost certainly have to turn one of them off > while you make that change. > > In the foregoing, I've made several assumptions about Airport routers > that may not be true, so someone with more knowledge of that > particular router might verify or alter my assumptions. > > If this works, you should be able to have each computer choose which > Airport it wants to connect to and there shouldn't be any conflict > between the two. > >> Need help from one of the smart ones.... >> >> >> With all the unbelievable problems with Insight I had to install a >> backup source for getting online, so I installed a DSL line, to give >> added protection I put it behind an Airport Express router, as I >> already had done with Insight. >> >> So I am running two Airport Express routers, named them each >> differently, put them on the network and by golly it works >> unbelievably well, this blew me away for this would have taken a >> degree had I tried to get all this to work under Windows I am >> convinced. >> >> I have one problem when I put one of the computers on DSL and the >> others are on Cable, the two routers are wanting to use the same IP >> addresses, thus shutting down the DSL for it was wanting the same IP >> address that was already in use by the Insight router. >> >> When I open the Airport Admin utility I find that once I am logged in >> I can click on the "network" tab and there I have an option for >> "share a range of IP addresses" which is dimmed, and the "share a >> single IP address (Using DHCP and NAT) is what is highlighted. >> >> So, can I get around my problem by selecting the cable network (since >> this say using DHCP) I assume I can't use this with the DSL line, or >> is DHCP for the router and has nothing to do with Cable? >> >> If I do select the range, what numbers do I type in there? Below is >> the wording of the error that appeared on screen as DSL was shut >> down. >> >> The IP configuration that showed as an error read: 10.0.1.3 in sue by >> 00:11:24........DCHP Server 10.1.1.1 >> >> Most likely I have not explained this well, but someone out there my >> still be able to understand what is going on and what I need to do >> for correction. >> >> Many thanks, >> >> John R. | The next meeting of the Louisville Computer Society will | be May 23 at Pitt Academy, 6010 Preston Highway. | The LCS Web page is <http://www.kymac.org>. | List posting address: <mailto:macgroup at erdos.math.louisville.edu> | List Web page: <http://erdos.math.louisville.edu/macgroup>
