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Hello, 
 
I have developed a device driver for RTL8139 (c) ethernet card and I have encountered a problem while transmitting the packets. 
 
The following set up is used to check for the transmission 
 
1) Host A transmits an ARP packet to Host B. 
2) Packets are captured on Host B using a sniffer. 
 
Problem: 
Ethernet Packets are getting corrupted on transmission to the Host B. This is checked by using a sniffer on Host B. 
 
The following observations are made while packets are transmitted: 
1) Every time a packet is transmitted, the entire frame takes new corrupted value 
(ethernet destination address, source address, protocol type, data (ARP packet)). 
2) TSAD register points to the correct physical address of the buffer and contents of the buffer 
doesn't get changed. However, the packet is corrupted while transmission. &nbsp; 
 
Kindly tell me what may be the reason for the data corruption? 
 
Thanks in Advance...
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Hello,

I have developed a device driver for RTL8139 (c) ethernet card and I have encountered a problem while transmitting the packets.

The following set up is used to check for the transmission

1) Host A transmits an ARP packet to Host B.
2) Packets are captured on Host B using a sniffer.

Problem:
Ethernet Packets are getting corrupted on transmission to the Host B. This is checked by using a sniffer on Host B.

The following observations are made while packets are transmitted:
1) Every time a packet is transmitted, the entire frame takes new corrupted value
(ethernet destination address, source address, protocol type, data (ARP packet)).
2) TSAD register points to the correct physical address of the buffer and contents of the buffer
doesn't get changed. However, the packet is corrupted while transmission.  

Kindly tell me what may be the reason for the data corruption?

Thanks in Advance...

Ethernet Packet Corruption

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switches / Hubs

Network analysis is the process of identifying and remediating the processes and systems within a network, including performance, connectivity and security. The process is performed through the use of tools developed for monitoring and analyzing network activity. Network problems that involve finding an optimal way of doing something are studied under the name combinatorial optimization. Examples include network flow, shortest path problem, transport problem, transshipment problem, location problem, matching problem, assignment problem, packing problem, routing problem, Critical Path Analysis and PERT (Program Evaluation & Review Technique).