If a Domain ID is not configured or assigned on a
VSAN, then the switch may isolate E_ports on that
VSAN. The conditions are :
- If the Domain Manager is enabled on the local
  switch and its request for a configured static
  Domain ID is rejected or no other Domain ID is
  assigned, then the E_ports are isolated.
- If the domain manager is not enabled and if a
  static Domain ID is not configured on the VSAN,
  then the switch will isolate all of its E_ports
  on the VSAN.
          
This notification contains the vsanIndex of the VSAN
on which the condition happened.

This notification indicates that the sending switch
has become the new Principal Switch on a VSAN. This
notification is sent soon after its election as the
new Principal Switch, i.e., upon expiration of a
Principal Switch selection timer which is equal to
twice Fabric  Stability Timeout value (F_S_TOV).
          
This notification contains the vsanIndex of the VSAN
on which the switch became the Principal Switch and
the WWN of the switch which became the Principal
Switch.

This notification is sent whenever a switch sends or
receives a Build Fabric (BF) or a ReConfigure Fabric
(RCF) message on a VSAN.
          
A switch can receive or issue a BuildFabric (BF) or a
ReConfigureFabric (RCF) message under following
conditions:
- A new link causes two disjoint fabrics in a VSAN to
  merge into one fabric. The sent/received message is
  BF if the Domain ID lists on the disjoint fabric
  does not overlap and it is RCF if they overlap.
- An upsteam principal ISL which connects to Principal
  switch and other switches in a VSAN fails. BF is
  issued to see if there is an alternative path to
  the Principal Switch. If not paths exit, then an RCF
  is issued.
- A switch asks for a different set of Domain IDs
  than the currently assigned list, the Principal
  switch would issue an RCF.
          
The notification is not sent if a
'dmNewPrincipalSwitchNotify' notification is sent
for the same transition.
This notification contains the vsanIndex of the VSAN
on which RCF was issued.