I'm having a longstanding issue with using the SSH connection over the USB
RNDIS ethernet interface; it works at first but after a while I lose the
network connection. Here's what I've observed so far:
The network is shown as up on the BBB
[root@bbb]~$ ifconfig
eth0 Link encap:Ethernet HWaddr b0:d5:cc:f6:a1:f2
inet addr:192.168.1.29 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::b2d5:ccff:fef6:a1f2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:114 errors:0 dropped:0 overruns:0 frame:0
TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10056 (9.8 KiB) TX bytes:1332 (1.3 KiB)
Interrupt:175
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:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
usb0 Link encap:Ethernet HWaddr b0:d5:cc:f6:a1:f0
inet addr:192.168.7.2 Bcast:192.168.7.3 Mask:255.255.255.252
inet6 addr: fe80::b2d5:ccff:fef6:a1f0/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:136 errors:0 dropped:0 overruns:0 frame:0
TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:14692 (14.3 KiB) TX bytes:1356 (1.3 KiB)
However, if I check ifstate it is not listed:
[root@bbb]~$ cat /run/network/ifstate
lo=lo
eth0=eth0
When trying to bring it back down/up by force, RTNETLINK complains
[root@bbb]~$ ifdown usb0
ifdown: interface usb0 not configured
[root@bbb]~$ ifup --force usb0
RTNETLINK answers: File exists
Failed to bring up usb0.
But the /etc/network/interfaces show the usb0 configured
[root@bbb]~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface usb0 inet static
address 192.168.7.2
netmask 255.255.255.252
network 192.168.7.0
gateway 192.168.7.1
auto eth0
iface eth0 inet dhcp
and from dmesg, the g_ether module loads correctly
[ 23.579423] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008
[ 23.579434] g_ether gadget: g_ether ready
[ 23.823800] IPv6: ADDRCONF(NETDEV_UP): usb0: link is not ready
[ 23.991528] g_ether gadget: high-speed config #2: RNDIS
[ 23.991792] IPv6: ADDRCONF(NETDEV_CHANGE): usb0: link becomes ready
>From the PC the network is discovered but no gateway/ip address/etc.. is
configured (see network details screenshot)
Where can I go from here? The usb0 network *seems *to be up but the
underlying setup fails at some unknown point. Rebooting the BBB does not
fix the issue, only "fix" so far is to reflash the BBB with a fresh image.
This issue has happened on many different BBB v.C. I am running
the bone-debian-8.4-console-armhf-2016-05-13-2gb.img precompiled image with
a slight modification to the DTS to disable an i2c that was interfering
with some of my overlays. Any pointers are grealty appreciated!
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