Hello,
While I am comfortable with basic network configuration, I came across an unusual network topology at work today that we are having a problem with and I could use some help figuring it out. Here is a basic description of how things are currently set-up:
At the core, there is a 24 port Netgear switch (JFS524). Connected to this switch is one PC with a statically assigned IP of 169.254.130.1, also connected to the switch are 6 Linksys routers (BEFSR41), assigned ip's 169.254.130.101-106. Each router serves as a local DHCP server but has it's number of DHCP-assignable addresses restricted to 1, and each has it's DHCP starting address as 169.254.130.21-26 respectfully. The routers are connected to the switch via one of the LAN ports on the router. Each router is then connected (also via one of its LAN ports) to a network enabled device (a product under test which is controlled via ethernet). Thus there is one router per test station. These devices (those under test) are removed from the network when the testing is completed and a new device is put in its place.
In theory, what we are trying to achieve is that when a device under test is connected, it will request an IP address and the router for that test station will always assign the same IP to devices connected at that station. The user at the PC will then be able to selectively connect to devices under test (through an application which is trivial for the purpose of this question) because the operator will always know which IP is associated with devices at a particular test stand.
This set-up is working most of the time, but we are experiencing an intermittent problem that is causing a lot of trouble. Occasionally when we connect a device to one of the routers, one of the other routers in the system ends up assigning the device its "assignable IP" instead of the router that the device is directly connected to. As you can see this kind of defeats the entire purpose of the setup and knowing which IP is assigned to a particular device based on the test stand it is at. Someone in my office suggested that connecting the routers to the switch via their WAN ports may help, but I'm worried this would lead to a slew of other addressing problems that would have to be worked out.
If anyone has any thoughts on how best to configure our equipment to function as I described, I would be very grateful.
While I am comfortable with basic network configuration, I came across an unusual network topology at work today that we are having a problem with and I could use some help figuring it out. Here is a basic description of how things are currently set-up:
At the core, there is a 24 port Netgear switch (JFS524). Connected to this switch is one PC with a statically assigned IP of 169.254.130.1, also connected to the switch are 6 Linksys routers (BEFSR41), assigned ip's 169.254.130.101-106. Each router serves as a local DHCP server but has it's number of DHCP-assignable addresses restricted to 1, and each has it's DHCP starting address as 169.254.130.21-26 respectfully. The routers are connected to the switch via one of the LAN ports on the router. Each router is then connected (also via one of its LAN ports) to a network enabled device (a product under test which is controlled via ethernet). Thus there is one router per test station. These devices (those under test) are removed from the network when the testing is completed and a new device is put in its place.
In theory, what we are trying to achieve is that when a device under test is connected, it will request an IP address and the router for that test station will always assign the same IP to devices connected at that station. The user at the PC will then be able to selectively connect to devices under test (through an application which is trivial for the purpose of this question) because the operator will always know which IP is associated with devices at a particular test stand.
This set-up is working most of the time, but we are experiencing an intermittent problem that is causing a lot of trouble. Occasionally when we connect a device to one of the routers, one of the other routers in the system ends up assigning the device its "assignable IP" instead of the router that the device is directly connected to. As you can see this kind of defeats the entire purpose of the setup and knowing which IP is assigned to a particular device based on the test stand it is at. Someone in my office suggested that connecting the routers to the switch via their WAN ports may help, but I'm worried this would lead to a slew of other addressing problems that would have to be worked out.
If anyone has any thoughts on how best to configure our equipment to function as I described, I would be very grateful.