IPv4 Unicast Routing
    
  
  
    This chapter assumes that you are already familiar with IP unicast routing. If not, refer to
            the following publications for additional information:
                - RFC 1256—ICMP Router Discovery Messages
 
                - RFC 1812—Requirements for IP
                    Version 4 Routers
 
            
            
Note   
For more information on
                interior gateway protocols, see:
For information on exterior gateway protocols, see BGP. 
For more information on switch support for IPv6, IPv6 Unicast Routing.