In my design i have two ethernet ports ETH0 and ETH1 . ETH0 is directly connected to PS through MIO interface . ETH1 is EMIO interface for the i connected gmii_to_rgmii IP core v.I am using gmii_to_rgmii IP core with KSZ9031rnx ethernet PHY device . i assigned a static IP to the ETH1 in etc/int.d/networks file as static IP .When ever i turn on the device i am able to ping the ETH1 with my PC . If make ETH1 LINK DOWN and again if i make ETH1 LINK UP PING is not happening if i power off the board and power on ping is working . Please help me with this ?