Beyond making sure that you are up-to-date on driver patches, you
should check the switch/hub/cable/other that is involved in the
topology. MC/SG is only as good as the underlying architecture. You
should ensure that you have done things like configuring standby NICs,
running MC/SG heartbeat packets over multiple LANs, multiple sources
of power, etc. Also, if a LANic outage does not warrant the package
going down, you can configure the package to stay up.

Good luck,

HP_BRS


Ulrich Windl <Ulrich.Windl@RZ.Uni-Regensburg.DE> wrote in message news:<m31xuno8dn.fsf@pc5234.klinik.uni-regensburg.de>...
> Hello,
>
> at the moment we are running the latest ServiceGuard release with
> Support Plus patches from June 2003 on a two-node-cluster consisting
> of two L3000 running HP-UX 11.11. The system are connected via a 100
> Base-T LAN and a 1000 Base-T LAN.
>
> Since May we had two network faults reported by cmcld that were not
> reproducible. SG had stopped the packages depending on the LAN
> interface, so it was not very good.
>
> I've watched /var/adm/nettl*, and all I could see was a "...bad cable
> connection...", "...going Offline @ [0/0/0/0] [Cable disconnected]".
>
> What worries me is that nettl never reports when the LAN interface is
> up again. According to cmcld the outage lasted exactly for 20 seconds.
> Last time it lasted exactly for 30 seconds.
>
> I guess that the driver is doing nonsense; maybe if the load is high.
> Can somebody explain what condition exactly triggers the "cable
> disconnected" message in the driver?
>
> Any insights?