title: Advantages of Openflow over SNMP? Differences between Openflow and SNMP?
body: <p>Why was the decision made to introduce a new protocol (Openflow) and new concept(SDN) to manage network devices remotely from a centralised location, when there is already a well know concept/management protocol is available like SNMP?</p>
  
  <p>Any reference links pointing to such decision discussion would be really helpful.</p>
  
  <p>Thanks in advance.</p>