Hi guys. sorry to ask so many questions.

Electronics
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1

Hi guys. sorry to ask so many questions. I’ve been at this for three hours now with no luck. Can find nothing on google either.

I am having issues getting ethernet working. I’m just not getting a DHCP address.

Eth0 does not seem to get set up properly, but usb0 seems to have the default BBB address.

I’ve tried this directly on the BBB via HDMI to a monitor, and connected to my computer via USB and a terminal program with the same result.

2

Hi Brad,

what is the result of ifconfig? This is what it shows on my BBB (fixed IP):

root@beaglebone:~# ifconfig
eth0 Link encap:Ethernet HWaddr C8:A0:30:AC:B5:37
inet addr:193.100.1.101 Bcast:193.100.1.255 Mask:255.255.255.0
inet6 addr: fe80::caa0:30ff:feac:b537/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:592 errors:0 dropped:1 overruns:0 frame:0
TX packets:386 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:51619 (50.4 KiB) TX bytes:96124 (93.8 KiB)
Interrupt:56

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:284 (284.0 B) TX bytes:284 (284.0 B)

usb0 Link encap:Ethernet HWaddr 8E:A2:CB:AE:91:E4
inet addr:192.168.7.2 Bcast:192.168.7.3 Mask:255.255.255.252
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:70 errors:0 dropped:6 overruns:0 frame:0
TX packets:40 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7400 (7.2 KiB) TX bytes:9723 (9.4 KiB)

3

It’s pretty much what you have listed there, except there is no inet addr entries on eth0. The HWaddr is there, and everything else, but no IP information at all.

4

It seems that there is no subnet mask setted.
If you are working on an Angstrom distribution, connman is the name of the systemd- service (google) that is responsable for the ethernet setttings. It is a kind of plug and play driver that appers when an ethernet cable is plugged.

You can find it here:
root@beaglebone:~# cd /usr/lib/connman/test

In this directory you can find a lot of scripts that can be use for setting the ethernet connection.

first of all you need to know the name of the “service” from your ethernet plug, doing this:

root@beaglebone:/usr/lib/connman/test#./get-services

and you get something like that:

[ /net/connman/service/ethernet_c8a030acb537_cable ]
IPv6.Configuration = { Method=auto Privacy=disabled }
AutoConnect = true
Name = Wired
Nameservers = [ 193.100.1.10 ]
Provider = { }
Favorite = true
Domains.Configuration = [ ]
Timeservers.Configuration = dbus.Array([], signature=dbus.Signature(‘s’), variant_level=1)
State = online
Proxy = { Method=direct }
Nameservers.Configuration = [ 193.100.1.10 ]
IPv4 = { Netmask=255.255.255.0 Gateway=193.100.1.10 Method=manual Address=193.100.1.101 }
Timeservers = dbus.Array([dbus.String(u’193.100.1.10’), dbus.String(u’http://timeserver.rwth-aachen.de’), dbus.String(u’http://timeserver2.rwth-aachen.de’)], signature=dbus.Signature(‘s’), variant_level=1)
IPv6 = { }
Domains = [ ]
Ethernet = { Interface=eth0 MTU=1500 Method=auto Address=C8:A0:30:AC:B5:37 }
Security = [ ]
Proxy.Configuration = { }
Type = ethernet
Immutable = false
IPv4.Configuration = { Netmask=255.255.255.0 Gateway=193.100.1.10 Method=manual Address=193.100.1.101 }

The name of the servivce is in this (my) case:

ethernet_c8a030acb537_cable (very handy :-)).

Now you can set everything by calling:
(root@beaglebone:/usr/lib/connman/test#)./set-ipv4-method ethernet_c8a030acb537_cable dhcp 193.100.1.10 255.255.255.0 193.100.1.10

You get a description when calling it without parameters (just ./set-ipv4-method)

This is just my configuration (what I temporary changed to dhcp for you). 193.100.1.10 is my router. After changing the settings it can take a minute or more until the dhcp server has give the BBB a new IP address. After that you can see it with ./get-services. Looks like that (look at the IPV4 settins only, not IPV6):

root@beaglebone:/usr/lib/connman/test#./get-services
[ /net/connman/service/ethernet_c8a030acb537_cable ]
IPv6.Configuration = { Method=auto Privacy=disabled }
AutoConnect = true
Name = Wired
Nameservers = [ 193.100.1.10 ]
Provider = { }
Favorite = true
Domains.Configuration = [ ]
Timeservers.Configuration = dbus.Array([], signature=dbus.Signature(‘s’), variant_level=1)
State = ready
Proxy = { Method=direct }
Nameservers.Configuration = [ 193.100.1.10 ]
IPv4 = { Netmask=255.255.0.0 Method=dhcp Address=169.254.199.42 }
Timeservers = dbus.Array([dbus.String(u’193.100.1.10’), dbus.String(u’http://timeserver.rwth-aachen.de’), dbus.String(u’http://timeserver2.rwth-aachen.de’)], signature=dbus.Signature(‘s’), variant_level=1)
IPv6 = { }
Domains = [ ]
Ethernet = { Interface=eth0 MTU=1500 Method=auto Address=C8:A0:30:AC:B5:37 }
Security = [ ]
Proxy.Configuration = { }
Type = ethernet
Immutable = false
IPv4.Configuration = { Method=dhcp }

I hope this can help,
Guenter

5

hey thanks @Gunter_Putz got a little further, but when I enter
./get-services at the root@beaglebone:/usr/lib/connman/test# prompt, it just goes right back to the prompt without anything in between. I can see the script in the directory.

It’s gotta be something simple I’m doing incorrectly on my end. Looks like I’ve got more research to do :slight_smile: