Appendix E-4 References; Appendix E-5 Differences Between Ethernet And Ieee802.3; Appendix E-6 Icmp Protocol Supported By Ethernet Adapter - Mitsubishi Electric FX3U-ENET-ADP User Manual

FX -ENET-ADP User's Manual
3U

Appendix E-4 References

For details on TCP/IP, refer to the DDN Protocol Handbook (3 volumes).
Publisher
DDN Network Information Center
SRI International
333 Ravenswood Avenue, EJ291
Menlo Park, California 94025
RFC Number
TCP RFC793
UDP RFC768
IP RFC791
ICMP RFC792
ARP RFC826

Appendix E-5 Differences between Ethernet and IEEE802.3

The following shows the Ethernet header in the data link layer supported by the Ethernet adapter.
Ethernet data link layer header
Ethernet frame (V 2.0) specification
IEEE802.3 (ISO/IEC8802.3) frame specification
1) Ethernet
Destination address
2) IEEE802.3
Destination address

Appendix E-6 ICMP Protocol Supported by Ethernet adapter

The following table outlines the types of ICMP supported by the Ethernet adapter and the processing
performed by the Ethernet adapter.
ICMP Type
Echo Reply
0
Result of IP packet loopback
Echo Request
8
Requests loopback of IP packet
Others
*1. The Ethernet adapter can simultaneously receive two ICMP ECHO requests (type 8, Ping message),
which are used for existence confirmation, etc., and handles them accordingly.
When three or more ICMP ECHO requests are received at the same time, the third and succeeding
requests will be ignored.
If a response is not returned to the external device when an ICMP ECHO request is sent to the
Ethernet adapter, send an ICMP ECHO request to the Ethernet adapter again.
The Ethernet adapter is able to receive a maximum of 1460 bytes ICMP message at one time.
Do not send an ICMP message request exceeding 1460 bytes to the Ethernet adapter.
Source address
Source address Length
ICMP name/description
Upon receiving an Echo Request, the Ethernet adapter sends this message.
If destination existence confirmation is set in the buffer memory, the Ethernet
adapter sends this message when attempting to confirm the existence of the
target.
- Ignored by the Ethernet adapter. (Not supported)
Ethernet adapter
Type Data (46 to 1500 bytes)
Data (46 to 1500 bytes)
Processing by the Ethernet adapter
*1
Appendix E: Document, others
Appendix E-4 References
FCS
FCS
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