10G Core Routing Switch User Manual
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Reserved multicast addresses that are commonly used are described in the following table.
Table
Reserved multicast address list
Class D address range
Description
224.0.0.0
Base Address (Reserved)
224.0.0.1
Addresses of all hosts
224.0.0.2
Addresses of all multicast routers
224.0.0.3
Not for allocation
224.0.0.4
DVMRP routers
224.0.0.5
OSPF routers
224.0.0.6
OSPF DR
224.0.0.7
ST routers
224.0.0.8
ST hosts
224.0.0.9
RIP-2 routers
224.0.0.10
IGRP routers
224.0.0.11
Active agents
224.0.0.12
DHCP server/Relay agent
224.0.0.13
All PIM routers
224.0.0.14
RSVP encapsulation
224.0.0.15
All CBT routers
224.0.0.16
Specified SBM
224.0.0.17
All SBMS
224.0.0.18
VRRP
II. Ethernet Multicast MAC Addresses
When a unicast IP packet is transmitted on the Ethernet, the destination MAC address is the MAC address of the
receiver. However, for a multicast packet, the destination is no longer a specific receiver but a group with unspecific
members. Therefore, the multicast MAC address should be used.