text: **Alerts:**You can configure the system to raise Simple Network Management Protocol 
  (SNMP) traps to the enterprise monitoring system to alert on events that indicate an 
  interruption in internode communication occurred. 
  
  **Intercluster links**
  All Storwize V7000 nodes maintain a database of other devices that are visible on the fabric. 
  This database is updated as devices appear and disappear. 
  
  Devices that advertise themselves as Storwize V7000 nodes or IBM SAN Volume Controller 
  are categorized according to the system to which they belong. Nodes that belong to the same 
  system establish communication channels between themselves and begin to exchange 
  messages to implement clustering and the functional protocols of IBM Spectrum Virtualize. 
  
  Nodes that are in separate systems do not exchange messages after initial discovery is 
  complete, unless they are configured together to perform a remote copy relationship. 
  
  The intercluster link carries control traffic to coordinate activity between two systems. The link 
  is formed between one node in each system. The traffic between the designated nodes is 
  distributed among logins that exist between those nodes. 
  
  If the designated node fails (or all of its logins to the remote system fail), a new node is 
  chosen to carry control traffic. This node change causes the I/O to pause, but it does not put 
  the relationships in a ConsistentStopped state. 