You can use the watch-net and watch-net-all OpenBoot commands to check the status of network interfaces. The commands send packets addressed to itself, and watches the packets return.
When you run the watch-net command, the network specified by the net device alias is the network that is tested. The devalias command displays that network.
{0} ok devalias net
net /pci@300/pci@1/network@0
The command receives Ethernet multicast packets , and reports the status with a . (period) for each error-free packet received. or with an X for each packet received with a error.
Example:
{0} ok watch-net
1000 Mbps full duplex Link up
Looking for Ethernet Packets.
'.' is a Good Packet. 'X' is a Bad Packet.
Type any key to stop.
...........................X................................XX.........................
The command reports the status with a . (period) for each error-free packet received. or with an X for each packet received with a error.
Example:
{0} ok watch-net-all
Link down
Waiting for link
Link Down
/pci@300/pci@3/network@0
Link down
Waiting for link
Link Down
/pci@300/pci@1/network@0,1
Link down
Waiting for link
Link Down
/pci@300/pci@1/network@0
1000 Mbps full duplex Link up
Looking for Ethernet Packets.
'.' is a Good Packet. 'X' is a Bad Packet.
Type any key to stop.
....................................................................................................