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• This feature apply only stub areas routers which have  many forwarding routers to forward route to back bone or non-back bone areas
• This feature causes the router to advertise a maximum metric for non-stub destinations, making it the worst cost path to all destinations
• The result is that upon initializing the OSPF process, transit traffic will not flow through that stub router unless it is the only possible path.
• The "max-metric router-lsa" synatx unconditionally withdraw forwarding route to other areas
• Route from R5 must forward through R3 to R6.
• R1 will drop the route from R5 when " max-metric router-lsa" feature apply to specific router
  
    
  • R1 apply this feature
    
  
  
  • R5 route forward through R3 to R6
  
  

  
  REFERENCE
  1. INE_WORKBOOK_OSPF_STUB_ROUTE_ADVERTISEMENT 
  2. CISCO_DOC_GUIDE_STUB_ROUTE_ADVERTISEMENT