problem with link aggregation failover

[Ulrich Spörlein]

On Sun, 27.09.2009 at 09:49:03 -0400, Daniel Eischen wrote:
> On Sun, 27 Sep 2009, Ulrich Spörlein wrote:
> 
> > On Sat, 12.09.2009 at 22:34:41 +0200, Maciej Jan Broniarz wrote:
> >> Hello,
> >>
> >> I am trying to configure lagg failover mode on 7.2.
> >>
> >> I do:
> >>
> >> # ifconfig xl0 up
> >> # ifconfig fxp0 up
> >> # ifconfig lagg0 create
> >> # ifconfig lagg0 up laggproto failover laggport xl0 laggport fxp0
> >> # dhclient lagg0
> >>
> >> And all seems to work ok. Still I disconnect the cable from the master card the connection stops.
> >> Although fxp0 becomes active the connection is still dead. If I start pinging any host from that machine
> >> the conection comes back to live, but having ping in background all the time is not the solution.
> >>
> >> Am I doing something wrong or have I missed something in the configuration?
> >
> > Well, where is xl0 and fxp0 connected to? My first bet would be a
> > standard switch, if so try setting both devices to the same MAC address.
> > Otherwise the peers you connect to will send the IP packets to the wrong
> > MAC address and only after a timeout (or a forced push thanks to the
> > ping) will get their ARP cache into shape.
> 
> lagg should automatically make xl0 and fxp0 appear at the same MAC
> address.  The only time you should have to manually set the MAC
> address would be on cloned interfaces such as wlan, because the
> cloned interfaces don't propagate the MAC change down to the
> interface from which they were cloned.

Interesting, thanks for the hint. I only use it for LAN/WLAN failover,
so that's why I have to do this anyway.

Regards,
Uli