I have an existing network which I have attached a diagram. I will be adding another site like Pueblo with separate ATT line and router. The reason is Pueblo will be going to another site other than Odessa and be disconnect from Odessa eventually but in the meantime they need connection to Odessa and to the new site. They will be using the same gateway on the new site. All IP on switch will remain the same. Can you tell me what configuration I will need on the new router and switch so as not to disrupt the existing the network but users can go to new site using a simple mapping?
No it will be on a separate MPLS WAN network. the scenario is this one location is being sold out to another company. they will be having their own MPLS line. The just want to have a temporary connection into my network using their router. The told me they will create a vlan on my network using same gateway and DNS ip
In that case, give your router on the site a unique IP address on the LAN. Then get them to add a static route to their router (which is presumably the default route for the site) for your subnets via your router.
