cangen vcan0 command returns write: Network is Down

Question

Fairly new to this, any help/guidance would be greatly appreciated. Trying to run a virtual CAN network using can-utils, but I keep getting Network down message when I try to do a candump or cangen.

Here is some of the general process...

$: lsmod shows I have these....

Module                  Size  Used by
can_raw                20480  0
slcan                  16384  0
vcan                   16384  0
can                    45056  1 can_raw

Followed by these commands:

$ sudo ip link add name vcan0 type vcan

$ ifconfig vcan

vcan0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-
00-00-00-00  
      NOARP  MTU:16  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)

$ cangen vcan0

gives me

write:Network is down.

Does this have something to do with setting chmod?

score 2 · Answer 1 · answered Nov 02 '17 at 22:28

2

Better with ip:

ip link set vcan0 up

answered Nov 02 '17 at 22:28

Fusho

1,469
1
10
22

What made you think that? – Fusho Nov 04 '17 at 23:09
on believing you would be able to help me with another question? Well, you answered my first one :) – Ryan Anderson Nov 05 '17 at 01:43
I've attached the link to the other question. Thanks again oxuf, much appreciated. https://stackoverflow.com/questions/47083099/raw-can-decoding – Ryan Anderson Nov 05 '17 at 14:43

score 0 · Answer 2 · answered Oct 25 '17 at 00:17

0

I got it to work. I needed to enter this

sudo ifconfig vcan0 up

I was entering that, minus the 'up'.

answered Oct 25 '17 at 00:17

Ryan Anderson

121
2
11

cangen vcan0 command returns write: Network is Down

2 Answers2