Operation Manual – Multicast Protocol
H3C S3610&S5510 Series Ethernet Switches
Chapter 1 Multicast Overview
1-8
Table 1-3
Some reserved multicast addresses
Address
Description
224.0.0.1
All systems on this subnet, including hosts and routers
224.0.0.2
All multicast routers on this subnet
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
OSPF designated routers/backup designated routers
224.0.0.7
Shared Tree (ST) routers
224.0.0.8 ST
hosts
224.0.0.9
Routing Information Protocol version 2 (RIPv2) routers
224.0.0.11
Mobile agents
224.0.0.12
Dynamic Host Configuration Protocol (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
Designated Subnetwork Bandwidth Management (SBM)
224.0.0.17 All
SBMs
224.0.0.18
Virtual Router Redundancy Protocol (VRRP)
II. IPv6 Multicast Addresses
As defined in RFC 4291, the format of an IPv6 multicast is as follows:
Figure 1-4
IPv6 multicast format
z
0xFF: 8 bits, indicating that this address is an IPv6 multicast address.
z
Flags: 4 bits, of which the high-order flag is reserved and set to 0; the definition
and usage of the second bit can be found in RFC 3956; and definition and usage
of the third bit can be found in RFC 3306; the low-order bit is the Transient (T) flag.
When set to 0, the T flag indicates a permanently-assigned multicast address