Zynq Ethernet Issues

Question

Hi all,
I have a Zybo Zynq 7000 where I am implementing a custom design in Vivado 2014.4. I am using a version of Ubuntu 12.04 from Xillybus as my Linux distrubution and am having problems getting the ethernet to work. 
Here is a snippet of my top level .dts with the relevant ethernet portion:
&gem0 {
local-mac-address = [00 0a 35 00 00 00];
phy-mode = "rgmii-id";
status = "okay";
xlnx,ptp-enet-clock = <0x6750918>;
ps7_ethernet_0_mdio: mdio {
#address-cells = <1>;
#size-cells = <0>;
here is the relevant ethernet portion from the zynq-7000.dtsi
gem0: ethernet@e000b000 {
compatible = "cdns,zynq-gem";
reg = <0xe000b000 0x1000>;
interrupts = <0 22 4>;
clocks = <&clkc 30>, <&clkc 30>, <&clkc 13>;
clock-names = "pclk", "hclk", "tx_clk";
#address-cells = <1>;
#size-cells = <0>;
When I do cd /sys/bus/platform/devices ls, an entry for ethernet shows up as "e000b000.ethernet" so it appears that it is recognizing the ethernet.
When I run ifconfig -a, the only thing displayed is the loopback address information. There is no other entry for an eth0 or anything else.
In my /etc/network/interfaces file, i have the following information (didn't post the actual address/netmask/gateway):
auto eth0
iface eth0 inet static
address xx.xx.xx.xx
netmask xx.xx.xx.xx
gateway xx.xx.xx.xx
dns-nameserver 8.8.8.8
When I do a  /etc/init.d/networking restart, I get the follwing:
"*Reconfiguring networking interfaces...
Cannot find device "eth0"
Failed to bring up eth0"
When I do an ifup eth0, I get the following:
"Cannot find device "eth0"
Failed to bring up eth0"
Just to add, on the board, the LINK and ACT leds next to the ethernet connector light up and blink when the board is powered up, suggesting that it is sending or receiving network traffic, but as I said I cannot connect to the internet.
Can anyone help identify my problem? If you need the output of any other commands or any other information, please let me know. I've tried browsing the forums and trying the suggested solutions from other threads with similar problems, but am not having any luck.
Thank you,
Chris

Answer 1

Once you boot , can you try the command ifconfig to see if the eth0 is seen interface?
If the eth0 is seen, try setting the IP address to it by using the command ifconfig eth0 192.168.1.11 up.
As i expect the board and PC are connected through the ethernet cable, configure your PC IPV4 setting to 192.168.1.10 and the subnet.
If all this is fine, try to ping using the command ping 192.168.1.10 and see what happens.
If you are not able to work with above steps, you may have to verify the dts settings etc.
I see the compatiable PHY details missing in the device-tree.
example device-tree for eth0:
&gem0 {
  local-mac-address = [00 0a 35 00 c0 12];
  phy-handle = <&phy0>;
  phy-mode = "rgmii-id";
  mdio {
   #address-cells = <1>;
   #size-cells = <0>;
   phy0: phy@0 {
    compatible = "marvell,88e1116r";
    device_type = "ethernet-phy";
    reg = <0>;
Hope this helps.
Regards,
Achutha