Network connection not working anymore

[aanuit]

Hi,

A while ago I installed KVM on my Debian server. This all worked well. The host could connect to the network. All the VMs were able to connect to each other and the internet. I created a bridge network to achieve this.

Unfortunately, now the host is not able to connect to the network/internet anymore.
Don't know about the VMs, they are not running and I need to connect to the host first before I can start them up.

How to solve this?
What steps to follow for troubleshooting?

This is the information I have (I connect through HP ILO):

[Head_on_a_Stick]

Please run this command and post any error messages that appear:

Code: Select all

# ifup eno1

I presume you've checked the routing?

Code: Select all

ip r

[aanuit]

Thank you for your answer.

ip r.......

I don't know what this means.

ifup.......
That command is not recognized.
I tried: ip link set eno1 up
That command did not return anything, no error either.

[Head_on_a_Stick]

if up.......
That command is not recognized.

http://forums.debian.net/viewtopic.php?f=16&t=142973

tl;dr:

Code: Select all

# /sbin/ifup eno1

EDIT: and please try to post the actual text (using code tags for terminal output) rather than pictures of text.

Related: https://wiki.archlinux.org/index.php/Li ... in_clients

[aanuit]

Ifup command returns.....

interface eno1 already configured

Unfortunately I am not able to copy/paste text.
I am using the HP ILO interface.
I can't copy/paste from that, at least as far as I know.
As soon as I can use PUTTY again, I will copy/paste.

[Head_on_a_Stick]

Ifup command returns.....

interface eno1 already configured

Yes, of course, how silly of me. How about this:

Code: Select all

# ifdown eno1
# ifup eno1

Unfortunately I am not able to copy/paste text.

Yes, I know, that's why I posted the ArchWiki link about pastebin clients — you can use them to upload the output and then share the link here.

[ralph.ronnquist]

I think the problem here basically is that eno1 is assigned an IP address whilst being a port of the bridge br0.
To avoid that you should change /etc/network/interfaces to bring up eno1 as "manual" rather than via "dhcp".
Specifically, the line "iface eno1 inet dhcp" should read "iface eno1 inet manual".
The rest could stay the same.