All Questions
15
questions
0
votes
0
answers
79
views
Ethernet connection loses upstream UDP and TCP packets but downstream UDP packets are fine
2 of my PCs are connected to my router like so:
Both PCs' ethernet cables -> Switch -> ethernet cable -> ethernet socket -> ethernet cable from socket -> switch -> ethernet cable to ...
- 398
0
votes
1
answer
80
views
Difference between 100Mbps 1000Mbps INITIALIZATION-state
What is the physical difference between 10Mpbs, 100Mbps and 1000Mbps (BASE-T) INITIALIZATION.
10Mbps and 100Mbps does not use all of the 8C8P(RJ45) pins. Does 1000Mbps utilize the full 8 pins for ...
- 1
1
vote
1
answer
3k
views
UDP client to listen to a multicast group/port without setting its own IP?
I have a small microcontroller device that I program via USB using Python. The device has an Ethernet connection, which can be configured either with DHCP or by manually setting the IP/Subnet via USB. ...
- 121
-1
votes
1
answer
536
views
What handshakes happen (or need to happen) when I connect my FPGA with Ethernet cable to my home router+modem device in one of its ethernet port? [closed]
I have a FPGA edge device. I want to send and receive ethernet packets to my laptop through the router+modem device at my house. My laptop is connected to the router+modem through the wifi (for ...
- 5
0
votes
1
answer
45
views
Modbus TCP Corrected Message
I am using freemodbus library for the stm32 modbus TCP client example. But I want to learn how to protech modbus tcp message on the line.
For example Master wants to read 5th holding register from ...
- 105
0
votes
0
answers
507
views
TCP port number reused
I am using STM32 TCP Echo server client Cube IDE example. I have server and client device. I can connect first time successfully but when I reset the client, I get after 70 line in wireshark ...
- 105
1
vote
1
answer
60
views
PC suddenly cannot do layer 3 communications any more
A PC running Win7x64 always functioned properly until a power off yesterday. From then on, the IP layer of its 3 network interfaces (2 LAN, 1 WL) only partially function any more.
A backup was taken ...
- 11
1
vote
0
answers
70
views
TCP connection to FPGA board
I'm trying to establish a TCP connection to an FPGA board from my Windows PC. The PC has two Ethernet interfaces, one is connected directly to the FPGA board, the other one is connected to the company ...
- 11
1
vote
2
answers
357
views
Why Imx6q(Embedded Linux Device) ethernet communication is too slow?
I have tried several methods to test the ethernet communication of the Imx6 card.
1) When I ping in my computer from IMX6, the ping does not reach the IMX6. But when I ping to imx6 from the computer, ...
- 11
2
votes
1
answer
2k
views
Client not responding TCP SYN-ACK packet ethernet driver
I am developing an Ethernet driver and implementing TCP exchange code. To test my TCP code this is the scenario (monitored on wireshark):
Server: Custom Ethernet device
Client: PC
I opened ...
- 23
1
vote
0
answers
1k
views
Ethernet port on Linux machine not recognizing ethernet connection with embedded device
I have an atmel at91sam7x256 microcontroller that I would like to use for a TCP/IP communication. The very first step of my project is to be able to "ping" my board given its IP address. I have its IP ...
- 155
0
votes
1
answer
51
views
Ethernet port re-transmission frequently
We have a laptop that uses its Ethernet port to connect to a device-local network, and wireless for Internet.
Recently we installed Wireshark to diagnose some network problem. We found a lot of TCP ...
- 430
3
votes
1
answer
491
views
How do I prevent connection resets upon pulling the ethernet cable?
In Windows, when you pull out (trip over it) a network cable, then the connections get reset.
If you do the same on a Linux box or if you put a switch between PC and router and then pull the cable ...
- 186
0
votes
2
answers
366
views
How to use a different Ethernet connection
I'm running a virtual machine at home which has a VPN connection to our main office, but I also want to connect to a share on another machine at home.
When I check with IPCONFIG I can see two ...
- 2,154
30
votes
5
answers
32k
views
Ethernet vs TCP vs IP?
What is the difference between Ethernet, TCP, and IP in simple (simple abstract) terms?
Please do not copy from Wikipedia...
- 1,247