For IP Address Traffic System
Purpose To select different multicast addresses.
Value IP address Guidelines
  • IP multicast addresses, also known as group addresses, are in the class D range of to as defined by setting the first four high order bits to 1110.
In network prefix or Classless Inter-Domain Routing ( CIDR) notation, IP multicast addresses are summarized as Multicast addresses in the range to ( are reserved for the local subnet and are not forwarded by IP routers regardless of the Time to Live (TTL) in the IP header.
  • The IP multicast addresses from:
  • to are either reserved or assigned to a multicasting application.
  • to ( are reserved for applications that can be administratively scoped.
  • The following are examples of reserved IP multicast addresses:
  •–all hosts on this subnet.
  •–all routers on this subnet.
  •–Open Shortest Path First (OSPF) Version 2, designed to reach all OSPF routers on a network.
  •–OSPF Version 2, designed to reach all OSPF designated routers on a network.
  •–Routing Information Protocol (RIP) Version 2.
  •–Network Time Protocol.
For the latest list of reserved multicast addresses, visit the Information Sciences Institute web site.
Default Value
CAUTION: If you change the address, make sure that you change it on all the machines, in order to insure that they will continue "talking" with each other.