3com WX3000 Manuel D’Utilisation

 

1-8 

239.0.0.0 to 239.255.255.255 

Administratively scoped multicast addresses, which are for 
specific local use only. 

 

As specified by IANA, the IP addresses ranging from 224.0.0.0 to 224.0.0.255 are reserved for network 

protocols on local networks. The following table lists commonly used reserved IP multicast addresses:  

Table 1-3 Reserved IP multicast addresses 

224.0.0.1 

Address of all hosts 

224.0.0.2 

Address of all multicast routers 

224.0.0.3 Unassigned 

224.0.0.4 

Distance vector multicast routing protocol (DVMRP) routers 

224.0.0.5 

Open shortest path first (OSPF) routers 

224.0.0.6 

Open shortest path first designated routers (OSPF DR) 

224.0.0.7 

Shared tree routers 

224.0.0.8 

Shared tree hosts 

224.0.0.9 RIP-2 

routers 

224.0.0.11 Mobile 

agents 

224.0.0.12 

DHCP server/relay agent 

224.0.0.13 

All protocol independent multicast (PIM) routers 

224.0.0.14 Resource 

reservation protocol (RSVP) encapsulation 

224.0.0.15 All 

core-based tree (CBT) routers 

224.0.0.16 

The specified subnetwork bandwidth management (SBM) 

224.0.0.17 All 

SBMS 

224.0.0.18 Virtual 

router 

redundancy protocol (VRRP) 

224.0.0.19 to 224.0.0.255 

Other protocols 

 

Like having reserved the private network segment 10.0.0.0/8 for unicast, IANA has also reserved the 

network segment 239.0.0.0/8 for multicast. These are administratively scoped addresses. With the 

administratively scoped addresses, you can define the range of multicast domains flexibly to isolate IP 

addresses between different multicast domains, so that the same multicast address can be used in 

different multicast domains without causing collisions.  

 

When a unicast IP packet is transported in an Ethernet network, the destination MAC address is the 

MAC address of the receiver. When a multicast packet is transported in an Ethernet network, a