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On the NETdimm in the system slot, the ethernet port, eth0, must be configured to have an IP address on the
local network for your host computer. Therefore eth0 acts as a gateway into the dimmPCI subnet for the local
area network. It is also the outside interface for your subnet to the local area network.
On the system slot NETdimm, the pci0 device is the inside interface to a second or third dimmPCI module in a
peripheral slot. This device will be the gateway used by each peripheral dimmPCI module.
On the peripheral dimmPCI module, only the pci0 interface needs to be configured. This device must be set up
to communicate with the pci0 device on the system slot NETdimm.
Requirements
• dimmPCI passive backplane 1.1
• NETdimm 1.2 or higher for system slot on dimmPCI backplane
• NETdimm 1.3 or higher, or IOdimm or CANdimm for peripheral slot
• 2.0.38 or higher kernel source and filesystem (SDK 2.03 or higher)
Note: When two NETdimm units are used on the backplane, the system slot device will cause the peripheral
device to reset as well. A NETdimm 1.3 is required since NETdimm 1.2 in the peripheral slot will not wait for the
system slot device on reset and will not get initialised.
The following files and programs will be used:
rc
imagez.bin
loader
Kernel Configuration
The 2.0 kernel must have specific networking and PCI options included in order for communication to occur
between two dimmPCI modules. These options will be set using the kernel configuration
cd /opt/uClinux/linux
make menuconfig
Using this main menu, under General Setup the following must be selected:
PCI support
PCI I2O transport layer
PCI networking support
The following default values for some PCI settings are already fairly optimal in the General Setup menu. It is
essential that the PCI frame size be the same for both dimmPCI devices if the default values are not used, since
the PCI frame size will set the maximum transmission unit (MTU) size.
5 PCI receive frames
2 PCI transmit frames
4 PCI frame size