[virt-tools-list] Curious Connectivity Issue

[Gustave Stresen-Reuter]

Hi again. Sorry for the last email. $VM should obviously be the name of the
guest (Smoothie in this case) and the $MAC should be the MAC address of the
interface in question. Duh.

I'll let you know how it goes.

Ted

On Tue, Nov 17, 2015 at 11:06 AM Gustave Stresen-Reuter <
tedmasterweb at gmail.com> wrote:

> Hi and thanks for checking this out. If I can't get this resolved soon I'm
> going to have to install an older version of the host OS, get everything
> configured, and then try upgrading. Is CentOS a good choice for the host?
> I'd use REL but I've never been clear on the licensing and don't want to
> put myself in a spot unnecessarily.
>
> Those screen shots are from the host, unfortunately. Apparently, when the
> Smoothwall starts up, it executes some sort of script that creates the
> Macvtap interfaces and that seems to be where the issue is. If I unplug the
> cable without those interfaces created, and plug it back in, connectivity
> is restored without issue.
>
> I'll try the command you suggest but…
>
> What should the value of $VM be? macvtap0 or enp5s0 (the interface defined
> by the host)? Same question for $MAC…
>
> Thanks again for lending a hand. This is frustrating because these sorts
> of things normally just work (thankfully).
>
> Kind regards,
>
> Ted Stresen-Reuter
>
> On Tue, Nov 17, 2015 at 1:13 AM Cole Robinson <crobinso at redhat.com> wrote:
>
>> On 11/16/2015 06:28 AM, Gustave Stresen-Reuter wrote:
>> > Hi,
>> >
>> > I'm new to the list and not even sure if this is the right list to be
>> writing
>> > to so please feel free to redirect if needed.
>> >
>> > I've summarized my issue in this blog post:
>> >
>> http://chicagoitsystems.com/centos-7-kvm-macvtap-loses-all-connectivity/
>> >
>> > However, since writing that, I've found that I can regain connectivity
>> by
>> > stopping and restarting the guest that uses the Macvtap connections.
>> > Apparently, the command that executes that creates the interfaces does
>> not
>> > include the "allow reconnections" options.+
>> >
>> > I would really appreciate it if someone could point me in the direction
>> I need
>> > to go to verify that this is indeed the issue (like, modifying the
>> script used
>> > to start the machine from the command line to see if I can add… oh
>> wait, maybe
>> > there is a switch in the XML that is not being set???)
>> >
>> > Anyway, as you can see, I would appreciate any pointers people on this
>> list
>> > can give.
>> >
>>
>> Are those screenshots from inside the guest, or is the host side screwed
>> up?
>>
>> If it's just the guest side, maybe this can be fixed by emulating a VM nic
>> unplug and replug event. You can do that with
>>
>> sudo virsh domif-setlink $VM --interface $MAC --state up|down
>>
>> So give that a shot and let us know if it works
>>
>> Thanks,
>> Cole
>>
>
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