Not sure if this is possible but here is the requirement.....
The local LAN needs to be extended from one building to another, it has to use telephone copper that is already installed into each building and goes back to a central exchange on site (this is a quick fix hopefully) and it would need to use the same IP subnet as the existing one on site (as in both on a layer two if possiible).
What I am thinking about is a pair of 2600s with T1 Data Service Unit/Channel Service Unit (DSU/CSU) WAN interface cards, and configure them to look at each other to create a T1 line, then using a GRE tunnel to create the layer 2 connection between the two buildings.
Having never had to create a network from a straight bit of copper without any other protocols over the top it may well be that this is not a sensible solution.
Also I should mention that budget is virtually nil and I am up against it on time - not of my doing it must be said.
The biggest problem with your currently available equipment may be that the CSU/DSU cards may not be able to work in a back-to-back connection. I can try to find out if such a setting is possible but I am not very optimistic. Usually, these cards are only capable of working in a client mode, and emulation of a CO functionality can be beyond their capabilities. In any case, I would need to know the exact type of these two cards.
I'm not sure if it fits your requirements, and Peter may have well answered your question, but you can create a T1 crossover cable to get the CSU to come up between the WICs. I've done it in a lab and it works fine. Your pinouts would be:
*Note: This would be just for the vwics to turn to up/up state and run standard l2 protocols over (hdlc,ppp). As far as your other requirement, you may look into bridging the internal interfaces but I'm not sure the 2600 supports IRB.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.