|
|
| siphil 2002-11-06, 8:03 pm |
| I just got the CiscoPress Router eSim and have come across a little problem that doesn't happen on any other sim I use.
Example:
I give the Serial 0 interface on RouterA an ip of 10.0.0.2, set the clock rate appropriately and go to the serial1 interface of the next router and give it 10.0.0.3 and it tells me I have an ip overlap, well, if your serial ip's can't be on the same subnet what good is it having a backbone of routers?!
Just a hint in the right direction if someone knows, please. | |
| darthfeces 2002-11-06, 8:15 pm |
| what mask are you using ?
are these ends of the same serial connection
or different ?
are you following an exercise or freelancing ? | |
| siphil 2002-11-06, 8:23 pm |
| I'm makin the addresses up myself. They're 10.0.0.2 for the s0 interface of the first router and 10.0.0.3 for the s1 on the second router. Sub is 255.0.0.0 for both and according to the exercise the connection between the two is a DCE.('show controllers' is disabled on the program so I can't check which end is DCE and which is DTE) The s0 is set to a clock rate of 56000 and the s1 is set to a bandwidth of 56.( I tried leaving the bandwidth off and it still doesn't work, but that probably doesn't have anything to do with it anyways.) I went up to Techskills today and used their sim and my exact same config was pinging no prob, so I dunno, whaddya think? | |
|
| The addresses of both the serial interfaces looks ok (though the subnet mask is a little large for a point-to-point connection, but that's another issue).
Since you can't see which router is the DCE, have you tried setting the clock rate at the S1 interface? Does that work? | |
| siphil 2002-11-07, 10:49 am |
| yeah, i tried that this morning and no luck. Basically I can't ping the s0 interface of this router from any host, or the even the router for that matter. I've triple checked everything and just can't get it right. Whats worse is the exact same simple little configuration works at school on their software. | |
| mcdoud 2002-11-07, 11:57 am |
| I believe s0 should be on one subnet and s1 should be on another. Your addresses are on the same subnet using the mask you used. that's probably why you get the error. You could try 10.0.0.1 mask 255.255.255.0 for s0 and 10.0.1.1 mask 255.255.255.0 for s1. Let me know if that helped. | |
| edmonds_robert 2002-11-07, 6:58 pm |
| Mcdoud,
If you put the two interfaces on different subnets, they will not be able to talk to each other unless they go through a router. Kinda defeats the point of a point-to-point link, wouldn't you say?
The question I have is, what is the IP address of the Ethernet interface. Usually when you get an IP overlap error, it is because you have two interfaces on the same router that are on the same subnet. From the numbering of your serial interfaces, I'm guessing the Ethernet interface is 10.0.0.1. How am I doing so far?
If that is in fact correct, put your Ethernet interface on a different subnet, like 10.1.0.1, and shorten the subnet mask a little. And for the point-to-point links, use the subnet mask 255.255.255.252. | |
| mcdoud 2002-11-08, 6:50 am |
| I thought s0 and s1 were 2 interfaces on the same router. Would not your logic apply in this case for using different subnets??
If s0 and s1 are on 2 different routers connected by a serial link, then I agree that they must be on the same subnet to talk. I don't believe that to be the case! | |
| mconnolly 2002-11-08, 8:01 am |
| If you must use that netmask I would verify that you do not have any other interfaces on the 10.0.0.0 network | |
| edmonds_robert 2002-11-08, 11:04 am |
| "I give the Serial 0 interface on RouterA an ip of 10.0.0.2, set the clock rate appropriately and go to the serial1 interface of the next router"
Looks like different routers to me. |
|
|
|