Forum Discussion

Henrik_S's avatar
Henrik_S
Icon for Nimbostratus rankNimbostratus
Sep 18, 2018

TCPdump fails to write LACP frames to file

Hello, I am trying to capture LACP frames with tcpdump which works great on parsing and showing the frames directly on the console. However if I want to save the capture with the -w argument, no fr...
application delivery
devops
LTM
Philip_Jonsson's avatar
Philip_Jonsson
Icon for MVP rankMVP
Sep 18, 2018

Have you tried filtering the Protocol Header? 

tcpdump -ni  -e ether proto 0x8809

This article seems relevant:

K2289: Using advanced tcpdump filters

Check the Tracing Ethernet header type LACP

Let me know how it goes and if you have further questions 🙂