problem with link aggregation failover

Ulrich Spörlein uqs at
Sun Sep 27 09:13:18 UTC 2009

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.


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