
© Copyright 2019 TRENDnet. All Rights Reserved.
TRENDnet User’s Guide
Industrial Managed Switch Series
48
The first octet (01) includes the broadcast/multicast bit. The lower 23 bits of the 28-bit
multicast IP address are mapped into the 23 bits of available Ethernet address space. This
means that there is ambiguity in delivering packets. If two hosts on the same subnet each
subscribe to a different multicast group whose address differs only in the first 5 bits,
Ethernet packets for both multicast groups will be delivered to both hosts, requiring the
network software in the hosts to discard the unrequired packets.
Class
Address Range
Supports
Class A
1.0.0.1 to 126.255.255.254
Supports 16 million hosts on each of 127
networks.
Class B
128.1.0.1 to 191.255.255.254
Supports 65,000 hosts on each of 16,000
networks.
Class C
192.0.1.1 to 223.255.254.254
Supports 254 hosts on each of 2 million
networks.
Class D
224.0.0.0 to 239.255.255.255
Reserved for multicast groups.
Class E
240.0.0.0 to 254.255.255.254
Reserved for future use, or Research and
Development Purposes.
IP multicast
address
Description
224.0.0.0
Base address (reserved)
224.0.0.1
The All Hosts multicast group that contains all systems on the same
network segment
224.0.0.2
The All Routers multicast group that contains all routers on the same
network segment
224.0.0.5
The Open Shortest Path First (OSPF) AllSPFRouters address. Used to
send Hello packets to all OSPF routers on a network segment
224.0.0.6
The OSPF AllDRouters address. Used to send OSPF routing information
to OSPF designated routers on a network segment
Содержание TI-G160WS
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