| Paul,
Quorum adjust from the BRS stations works by:-
At BRS configuration time, the MAC address of the interface on each
Cluster node that's running AMDS is hard coded into the BRS database.
It uses whichever interface happens to be running AMDS at that time, so
if customer changes AMDS$DEVICE logical at some time, or if any
specific filtering is applied to network device which prevents
the AMDS protocol reaching the Cluster nodes (I have seen this)
and doesn't re-run BRS$CONFIG, then it will stop working.
You can find out which address the QA frame will be sent to by running
BRS$CONFIG.EXE and taking the 'database maintenance' option and writing
a configuration report to a text file. Check the MAC addresses assigned
to each system in that file, then use $ ANAL/SYS and SHOW LAN/FULL to
check that the AMDS protocol (08-00-2b-80-48?) is runnign on the
interface that BRS thinks it it's on.
BRS will have, at config time, added an entry for each OMS in the
DRIVER_ACCESS file specifying teh actual MAC address and a password,
which is also input and configured at BRS config time. This password is
also coded into the rport mentioned above.
The point is that the BRS system seems to use only a very small part of
AMDS, and when you use the Availability system fully, it is capable of
listening to AMDS multi-cast frames from teh Cluster systems and
identifying which MAC address is *CURRENTLY* in use and not (like BRS)
the one that *WAS* in use when the BRS config took place.
I have had several probelsm like this.
Hope this help,
Michael Paddick - BRS European delivery team, Bristol UK.
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| On the subject of BRS re-configuration, I've got one customer who
persistently modifies the Console Manager and Watchdog databases via
their respective GUI interfaces. I seem to recall though each time you
use BRS$CONFIG, these databases no longer apply. New ones are created
based on what BRS$CONFIG knows. I always thought using BRS$CONFIG as
just a quick way to get things initially working. Later, the user
modifies things using the appropriate POLYCENTER application. Please
correct me if I'm wrong on this, or is there a way around all this?
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