Re: Setting up a bridged AP

[Philip Prindeville <philipp_subx redfish-solutions com>]

> On Sep 22, 2020, at 11:42 PM, Thomas Haller <thaller redhat com> wrote:
>
> Hi,
>
>
> On Tue, 2020-09-22 at 17:49 -0600, Philip Prindeville wrote:
> > Hi,
> >
> > I’m working on CentOS 8 Stream on a Raspberry Pi4 (64-bit mode), but
> > I don’t think that my issues are platform specific.
>
> right. We try that NetworkManager works the same everywhere. Usually
> what matters most is tha major (upstream) version that you are using.


Seeing a lot of -110 errors with the built-in hardware, but if I use an external USB fob like the Edimax then 
that seems to work okay.


> > I’d like to be able to decompose configuration into separate steps,
> > and fine tune them individually.
> >
> > I’ve got “eth1” (an external USB 3.0 Ethernet dongle, but I could be
> > using “eth0” just as easily).
> >
> > I’ve got “wlan0”, the built-in Wifi hardware.
> >
> > I’d like to join them into a bridge called “br0”.
> >
> > All of that is easy enough to do so far:
> >
> > nmcli conn add con-name “Bridge 0” \
> >    type bridge ifname “br0" \
> >    connection.autoconnect true \
> >    ipv4.method “manual” \
> >    ipv4.address “$LOCALIP/$LOCALPREFIX” \
> >    +ipv4.routes “224.0.0.0/4”
> >
> > nmcli conn add con-name “Bridge slave 0” \
> >    master “Bridge 0” \
> >    type ethernet ifname eth1
> >
> > nmcli conn add con-name “Bridge slave 1” \
> >    master “Bridge 0” \
> >    type wifi ifname wlan0 \
> >    mode ap ssid “$SSID” \
> >    802-11-wireless.band “bg” \
> >    802-11-wireless-security.key-mgmt “wpa-psk” \
> >    802-11-wireless-security.psk “$PASSPHRASE”
> >
> > So far, seems simple enough.
> >
> > I’ve also got a DHCP server provisioned and running, but I could just
> > as easily be running one elsewhere, since the bridging would flood
> > broadcasts from wlan0 to eth1 and vice versa.  Or I could have set up
> > a dhcp-relay and pointed that to a server on a different subnet.  The
> > point being that there’s more than one way to skin that cat.
> >
> > The DHCP server also points at the correct default gateway, and that
> > default gateway (being a border router) also provides NATting for me,
> > so that’s working fine also.
> >
> > But when I try to authenticate it fails.
> >
> > If I disable wpa_supplicant and run it manually as:
> >
> > wpa_supplicant -b br0 -i wlan0 -c …
> >
> > then it seems to authenticate.  Looking through the NM sources, I
> > don’t see anywhere that the parameter “BridgeIfname” gets squirted
> > into wpa_supplicant.
> >
> > What am I missing?
> >
> > Thanks,
>
>
> Hi,
>
> is this same issue as https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/83 ?
>
> best,
> Thomas


Oh, yes!  Definitely.  I looked yesterday in gitlab but missed this.

Is this going in as soon as a PR gets submitted?

If there’s a C8S scratch build I can test it…

Thanks,

-Philip