Two almost duplicate setups, one works one doesn't
I have two locations with almost duplicate setups.
Location 1: On a network run by a PDC. The ISP is a cable company. The one office in this location has 3 computers all connected to the network via a Netgear 5 port switch. But also connected to this switch is a DSL connection via a dsl modem line to a preset location.. When the users need to connect to this dsl line they just click on the shortcut created on their desktop that directs them to the preset IP address. All other communication for everything else goes through the regular PDC/cable network. Using DHCP and automatically sees PDC as DNS provider. Works great.
Location 2; On a network but run just by a router, not a PDC, through the local Cable company. Two computers connected via an identical 5 port Netgear switch as in the location 1. They have the the exact same dsl line via the same dsl modem connecting to the same IP address as in location 1. The problem is that you can only connect to one or the other in location 2. If you want to connect to the dsl location via the dsl modem, you have to disconnect the cable from the router from cable company at the Netgear switch. Or if you want to use cable you need to disconnect dsl modem from switch. Also running DHCP and DNS being provided by either the DSL or cable depending on which you are using.
What would cause one to work and the almost identical one won't?
Location 1: On a network run by a PDC. The ISP is a cable company. The one office in this location has 3 computers all connected to the network via a Netgear 5 port switch. But also connected to this switch is a DSL connection via a dsl modem line to a preset location.. When the users need to connect to this dsl line they just click on the shortcut created on their desktop that directs them to the preset IP address. All other communication for everything else goes through the regular PDC/cable network. Using DHCP and automatically sees PDC as DNS provider. Works great.
Location 2; On a network but run just by a router, not a PDC, through the local Cable company. Two computers connected via an identical 5 port Netgear switch as in the location 1. They have the the exact same dsl line via the same dsl modem connecting to the same IP address as in location 1. The problem is that you can only connect to one or the other in location 2. If you want to connect to the dsl location via the dsl modem, you have to disconnect the cable from the router from cable company at the Netgear switch. Or if you want to use cable you need to disconnect dsl modem from switch. Also running DHCP and DNS being provided by either the DSL or cable depending on which you are using.
What would cause one to work and the almost identical one won't?
Location 1: ... Location 2; ... the same dsl modem connecting to the same IP address as in location 1
I agree with the above suggestion for a diagram. If these are connected simultaneously, they cannot use the same IP address. That would seem to be part of the conflict.
I agree with the above suggestion for a diagram. If these are connected simultaneously, they cannot use the same IP address. That would seem to be part of the conflict.
What are the internal IP ranges you are using? It sounds like they might be over lapping. Also, this is kind of a strange setup to have users switch IPs to use a different ISP. If you can give us a general description of what you need to accomplish by having both maybe we can suggest another way of doing it.
ASKER
Attached are two had drawn network diagrams of both locations.Two-Similar-offies.pdf
We still need internal IP address information. That's a key thing to be known also.
Yes. You have Cable (ISDN) Modems on both sides of the simple switch.
Also, did you define static routes anywhere? I also wonder what exactly is defined with that PDC...
ASKER
I have to check with the ISDN Modem/router to see if it is acting as just a switch in Location 1. If it is then that could be the cause it is not working in Location 2
Yes, that can certainly be the cause. I do not see why you need this modem at all.
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On the surface it sounds like whatever you're doing is literally causing conflicts. However, without more details on exactly how the setup is laid out, it becomes hard to provide a precise response.
My biggest curiosity is why this type of setup, especially for location 2. Maybe there's something you're trying to accomplish that's not being understood here.