MULTICAST_IP_ADDR | CIMPLICITY 10 Documentation (original) (raw)
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| For | IP Address Traffic System |
|---|---|
| Purpose | To select different multicast addresses. |
| Value | IP addressGuidelines IP multicast addresses, also known as group addresses, are in the class D range of 224.0.0.0 to 239.255.255.255 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 224.0.0.0/4. Multicast addresses in the range 224.0.0.0 to 224.0.0.255 (224.0.0.0/24) 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: 224.0.1.0 to 238.255.255.255 are either reserved or assigned to a multicasting application. 239.0.0.0 to 239.255.255.255 (239.0.0.0/8) are reserved for applications that can be administratively scoped. The following are examples of reserved IP multicast addresses: 224.0.0.1–all hosts on this subnet. 224.0.0.2–all routers on this subnet. 224.0.0.5–Open Shortest Path First (OSPF) Version 2, designed to reach all OSPF routers on a network. 224.0.0.6–OSPF Version 2, designed to reach all OSPF designated routers on a network. 224.0.0.9–Routing Information Protocol (RIP) Version 2. 224.0.1.1–Network Time Protocol. For the latest list of reserved multicast addresses, visit the Information Sciences Institute web site. |
| Default Value | 224.0.0.29 |
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.