Sorry, forgot to change the subj.
Please change the Subject line to:

howto suppress well known "flip flop" messages?




Further infos:

That "flip-flop" is a feature(!) of  BCM570x Family PCI-Xr 10/100/1000BASE-T 
"Broadcom Advanced Control Suite"
called "Smart Load Balance (SLB)".
It can be run over any Networks cards, not just bc(?) and 
cheap switches without port trunking.



http://bcr2.uwaterloo.ca/~brecht/servers/docs/PowerEdge-2600/en/Broadcom/UG/protocol.htm#adapter

    Adapter Teaming

    Teaming provides traffic load balancing and redundant adapter
    operation in the event that a network connection fails.  When
    multiple Gigabit Ethernet Adapters are installed in the same
    server, they can be grouped into teams.  Each team with up to 8
    ports can be configured on the server.  If traffic is not
    identified on any of the adapter team members connections due
    to failure of the adapter, cable, switch port, or switch (where
    the teamed adapters are attached to separate switches), the
    load distribution is reevaluated and reassigned among the
    remaining team members.  In the event all the primary adapters
    are down, the hot standby adapter becomes active.  Existing
    sessions are maintained, causing no user impact.




    BASP supports three schemes of load balancing: Smart Load
    Balancing, Link Aggregation (802.3ad), and Generic Link
    Aggregation (Trunking).



    Smart Load Balancing (SLB)(tm)

    Broadcom implementation of load balancing based on IP flow.
    This feature supports balancing IP traffic across multiple
    adapters (i.e., team members) in a bi-directional manner.  In
    this mode, all adapters in the team have separate MAC
    addresses.  It provides automatic fault detection and dynamic
    failover to other team member or to a hot standby member; this
    is done independently of layer 3 protocol (IP, IPX, Net Beui).
    It works with existing layer 2 and 3 switches.  Note that no
    switch configuration (such as trunk, link aggregation) is
    necessary for and SLB team to work.

    ...

    (all others uses 1 MAC for all eths so not problem.)



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