[Bug 616064] Re: Broken networking in kvm guests

[Brian Fallik]

Serge,

On Fri, Sep 10, 2010 at 12:56 PM, Serge Hallyn
<616064 at bugs.launchpad.net> wrote:
> Quoting Brian Fallik (616064 at bugs.launchpad.net):
>> 6. apt-add-repository ppa:kernel-ppa/pre-proposed
>
> Did you do an apt-get update here?  If not, then you didn't get the
> updated kernels.

Yes, I just missed adding it to my notes.  I manually verified that
new versions of the packages with versions matching the PPAs were
actually installed.

> Ok, let's see if using just the bridge without kvm can reproduce the problem.
> If you can, please try the following:
>
> 1. Get a usable ns_exec:
>
>    git clone git://git.sr71.net/~hallyn/cr_tests.git
>    cd cr_tests
>    git checkout ns_exec
>    make ns_exec
>    cp ns_exec /bin/
>
> 2. Create a veth tunnel
>
>    sudo ip link add type veth
>
> 3. Open two root terminals to configure a network namespace for our test
>
> terminal 1:
>        ip link add type veth
> terminal 2:
>        /bin/ns_exec -cmn /bin/bash
>        echo $$   # call this $pid henceforth
> terminal 1:
>        ifconfig veth0 0.0.0.0 up
>        brctl addif virbr0 veth0
>        ip link set veth1 netns $pid # use pid from above
> terminal 2:
>        ifconfig veth1 up
>        dhclient veth1
>
> Now, on either the host or on an external host, do
>
> nc -4 -k -l 9999
>
> And from terminal 2 start dumping data
>        while [ 1 ]; do
>                echo ab | nc ipaddr 999
>                sleep 0.5s
>        done
>
> where ipaddr is the host or external host's ip address.
>
> Does that eventually lock up too?

I'll try and test this soon but it may fall to next week.

Thanks,
brian

-- 
Broken networking in kvm guests
https://bugs.launchpad.net/bugs/616064
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