This field is used to specifiy a route as input to the CSPF request for strict/loose explicit route request options. Format of the explicit route - First two bytes represent the route type (Strict (3) or Loose (4)). Next two bytes represent number of hops in the route. This is followed by each hop. Each hop is represented as Router Id, Next hop Address, Next Hop Interface identifier. Example strict explicit route for two hops - 00:03:00:02:0A:00:00:01:0A:00:00:01:00:00:00:00:1E:00:00:05 :20:00:00:05:00:00:00:00