Eth0 Stopped Working

[Jim Fell]

Yesterday, my BeagleBone Black (Rev C) was working fine.  Today, when I powered up the system eth0 is not coming up.

$ ip addr show eth0

2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000

    link/ether c8:df:84:d7:07:a6 brd ff:ff:ff:ff:ff:ff

How do I get eth0 to come up again?  I've tried rebooting the board with `$ sudo reboot` and restarting the service with `$ sudo /etc/init.d/networking restart` but neither helped.  Yesterday, I installed smbclient and cifs-utils, and deleted the /usr/src and /usr/include directories.  Does anyone know how to get eth0 working?

[Tarmo Kuuse]

Hi Jim,

There is a known problem with the Ethernet MAC not coming up on boot. This is likely to happen when you're powering the BeagleBone through the barrel connector. If this is the case, a simple reboot won't help. You need to shut down, remove power for 10 seconds and reconnect power. IIRC the physical reset button also helps.

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Kind regards,

Tarmo 

[Jim Fell]

Thanks, Tarmo.  I re-imaged my BBB with the latest firmware from the BeagleBone website, and the problem seems to have cleared up.

[evilwulfie]

physical reset button is a soft reset. a power cycle is the only way.

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Kind regards,

Tarmo 

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