wireshark capture packets from other computers

If, however, I run the application on PC B or C as well as WireShark, then that computer can see the traffic between the application and the CAN-Ethernet bridge.

I don't seem to be able to capture any packets going between PC A and the CAN-Ethernet bridge (although they are communicating with each other) with WireShark on computers B or C. If I ping the CAN-Ethernet bridge, I can see the pings in Wireshark but only on the laptop doing the pinging. But why can't I see any TCP packets going between PC A and the CAN-Ethernet bridge?

I can ping the CAN-Ethernet bridge form PCs B and C. Currently, Wireshark uses NMAP’s Packet Capture library (called npcap). By default, Wireshark captures on-device data only, but it can capture almost all the data on its LAN if run in promiscuous mode. PC A sends and receives TCP packets (mostly) successfully to the CAN-Ethernet bridge.įor some reason I don't understand I can't run npcap on computer A so I have also connected two other computers B and C to the same Ethernet switch both running Wireshark. Wireshark captures the data coming or going through the NICs on its device by using an underlying packet capture library. Also connected to the switch is a CAN-bus-to-Ethernet bridge. I have a Windows 11 PC A connected to an Ethernet switch.

Wireshark capture packets from other computers