We have a HO and 4 Restaurants which will be connected to the HO. At HO there is a existing Internet DSL and a DHCP and a Domain Controller. I have few queries:
1. The dhcp server is giving IPs in the 192.168.1.0/24 range. When I have the data circuits up and running will they be able to get IP from the DHCP server at HO?
2. We are looking at a flat network since each restaurant will have either one or 2 users.
3. If they wont be able to get IP what should be done for them to be able to use network resources from the HO.
Attached is the network diagram.
Almost correct. The ip helper-address will always be the same address ie. the ip address of your HO DHCP server. For arguments sake lets say it is 192.168.1.10
So yes, you create a different subnet for each site and then on each LAN interface of each 877 you need
ip helper-address 192.168.1.10
One other things to note. You are already using 192.168.1.x at your HO sites so for you can't use this at one of your remote sites as well. Just choose another spare subnet.