  Cluster SYSAP Info, SCS Bus Control? 
 The Question is:
 
I have two ethernet cards configured on a dual 8400 cluster and I'm trying
to determine the load on the two cards.  I would like to ensure that cluster
communication is restricted to one card and all other external communication
uses the other card.
 
I started by running show cluster/continuous and added classes connections
and credits.  This display indicates two transports that I would like to
know more about:
SCA$TRANSPORT &amp; VMS$VAXcluster.
I presume VMS$VAXcluster is the cluster communication but I can't find
anything about SCA$TRANSPORT.
 
Can you tell me more about these or point me in the right direction?
 
Thanks,
 
 The Answer is:
 
  Traditional Ethernet likely lacks sufficient bandwidth for this particular
  configuration.  The use of Fast Ethernet or (better) Gigabit Ethernet would
  be prefered, probably also with multihost SCSI buses and/or Fibre Channel
  controller(s) present.
 
  An OpenVMS Cluster will detect and use all available appropriate paths.
 
  As a general rule, an OpenVMS Cluster configuration can and should use
  all buses until proven otherwise.
 
  If you wish to disable a particular bus, see SYS$EXAMPLES:LAVC$STOP_BUS.*.
 
  VMS$VAXcluster is the Cluster SYSAP for the connection manager, for the
  distributed portion of the lock manager, and similar.
 
  SCA$TRANSPORT is the SYSAP associated with the interprocess communications
  (IPC) transport.  Things like JOB_CONTROL and the QUEUE_MANAGER, and the
  DDTM distributed transaction manager use IPC.  Starting with V7.2, you
  can potentially see multiple SCA$TRANSPORT SYSAPs operating on a node.
 
