Cannot use cell-c 3g network dongle and normal eth0 network at the same time.

Asked by Ruaan on 2011-04-17

I have the latest 11.04 beta Natty installed. I cannot access the internet when I use my 3g dongle, unless I disable my normal network connection (eth0). So I can only use one at a time, the dongle or my ethernet. What could be the cause/issue, perhaps a bug?

It worked fine in 10.04LTS

Question information

Language:
English Edit question
Status:
Solved
For:
Ubuntu network-manager Edit question
Assignee:
No assignee Edit question
Solved by:
Ruaan
Solved:
2011-04-20
Last query:
2011-04-20
Last reply:
2011-04-19

Log a bug. Natty is not ready and not stable so you will get things like this happening.

Yes, by reporting bugs you can help Natty to improve in quality. Before reporting any bugs, however, you should read https://help.ubuntu.com/community/ReportingBugs carefully. Then after searching for existing bug reports describing your situation, you can report this bug by running ubuntu-bug with the PID of the currently running instance of NetworkManager. (That will make sense after you read that page.) After you report the bug, you can link this question and the bug to each other with the "Link existing bug" link near the top of this page. However, your bug report should still be complete and self-contained--it should not be necessary for the Ubuntu developers to refer to this question in order to fully understand and appreciate your bug report.

If your wired network doesn't provide internet access, you should try to edit the connection's settings and check the checkbox "Use this connection only for the resources on its network", under the connection's settings, in the IPv4 tab, in the dialog that shows when you click the "Routes" button.

Ruaan (ruaanv) said : #4

Hi,

This did not have any effect. I still have the same issue. I have no
idea what to search for or where to look, as I only have had this
issue with 11.04, and no previous version. If you could point me in
the right direction?
I still feel this is a bug, as the OS should test whichever gives a
internet connection, as in previous versions? Or has the
implementation been changed moving to 11.04?

Regards
Ruaan

On 18 April 2011 20:18, Mathieu Trudel-Lapierre
<email address hidden> wrote:
> Your question #153193 on network-manager in Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/network-manager/+question/153193
>
> Mathieu Trudel-Lapierre proposed the following answer:
> If your wired network doesn't provide internet access, you should try to
> edit the connection's settings and check the checkbox "Use this
> connection only for the resources on its network", under the
> connection's settings, in the IPv4 tab, in the dialog that shows when
> you click the "Routes" button.
>
> --
> If this answers your question, please go to the following page to let us
> know that it is solved:
> https://answers.launchpad.net/ubuntu/+source/network-manager/+question/153193/+confirm?answer_id=2
>
> If you still need help, you can reply to this email or go to the
> following page to enter your feedback:
> https://answers.launchpad.net/ubuntu/+source/network-manager/+question/153193
>
> You received this question notification because you are a direct
> subscriber of the question.
>

--
Ruaan Viljoen

You should tell us more about your system. What is the output of the 'ip route list' command when both the wired network and the dongle are connected?

Wired, when connected, should always be preferred over a 3G dongle, for the simple reason that 3G usually costs you while wired doesn't.

As for testing, we can't test for internet access because what to test changes vastly between systems, environments, and locations. It's not sustainable, and you're always at the risk of whatever you're testing being down for any possible reason, which would show *your* connection as down when in fact it's working.

Ruaan (ruaanv) said : #6

Okay that makes sense. I will post more information on my system asap.

On 19 April 2011 15:57, Mathieu Trudel-Lapierre
<email address hidden> wrote:
> Your question #153193 on network-manager in Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/network-manager/+question/153193
>
>    Status: Open => Needs information
>
> Mathieu Trudel-Lapierre requested for more information:
> You should tell us more about your system. What is the output of the 'ip
> route list' command when both the wired network and the dongle are
> connected?
>
> Wired, when connected, should always be preferred over a 3G dongle, for
> the simple reason that 3G usually costs you while wired doesn't.
>
> As for testing, we can't test for internet access because what to test
> changes vastly between systems, environments, and locations. It's not
> sustainable, and you're always at the risk of whatever you're testing
> being down for any possible reason, which would show *your* connection
> as down when in fact it's working.
>
> --
> To answer this request for more information, you can either reply to
> this email or enter your reply at the following page:
> https://answers.launchpad.net/ubuntu/+source/network-manager/+question/153193
>
> You received this question notification because you are a direct
> subscriber of the question.
>

--
Ruaan Viljoen

Ruaan (ruaanv) said : #7

Thanks Mathieu Trudel-Lapierre, that solved my question.

Ruaan (ruaanv) said : #8

I removed all my connections, redid them with the "use this connection only for the resources on its network", and now the 3g works.

Thanks for the help.

Ruaan (ruaanv) said : #9

So now it works