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W6100 Datasheet(PDF) 104 Page - WIZnet Co., Ltd

Part # W6100
Description  Hardwired Dual TCP/IP Stack Controller
PDF  149 Pages
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Manufacturer  WIZNET [WIZnet Co., Ltd]
Direct Link  https://www.wiznet.io/ko/Product/
Logo WIZNET - WIZnet Co., Ltd

W6100 Datasheet(HTML) 104 Page - WIZnet Co., Ltd

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W6100 – Hardwired Dual TCP/IP Stack Controller
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6.3.3 UDP Multicast
UDP multicast is a communication method where the sender is one and receiver is a group.
In IPv4 mode, the multicast-group address range is 224.0.0.0 ~ 239.255.255.255 (Ref
IANA_Multicast Address) and the corresponding hardware address address is 01:00:5E:00:00:00
~ 01:00:5E:FF:FF:FF. When setting the multicast hardware address, its least significant 23 bits
should be same to the multicast-group address. (Ref rfc1112)
In IPv6 mode, set the multicast-group address like Figure 25.
The UDP multicast operation flow is same to Figure 23.
Figure 25 IPv6 Multicast-Group Address Format
Table 5 Parameters of Flags in IPv6 Multicast Address
Flags
Description
0
Always ‘0’
R
1 : Embedded RP
0 : No embedded RP
* If R = ‘1’, P must be ‘1’
P
1 : Based on Unicast Network Prefix
0 : Not based on Unicast Network Prefix
* If P = ‘1’, T must be ‘1’
T
1 : Temporary address(Local assigned)
0 : Permanent address(IANA assigned)
Table 6 Definition of Scope in IPv6 Multicast Address
Scope
Description
1
Node
2
Link
3
Subnet
4
Admin
5
Site
8
Organization
E
Global



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