The lacpanalyze python script scans all ethernet interface for lacp packets and display interfaces with their lacp keys. Additionally it displays the native vlan on the interface.
The tcpdump binary have to be installed.
./lacpanalyze.py
INFO: scanning interfaces (p7p1,p7p2) for lacp port channels ... max 65 seconds
INFO: match: 33048 on interface p7p1
INFO: match: 33048 on interface p7p2
{'33048': ['p7p1', 'p7p2']}
INFO: scanning interfaces (p7p1,p7p2) for VLAN association ... max 65 seconds
INFO: match: 466 on interface p7p1
INFO: match: 466 on interface p7p2
{'p7p1': '466', 'p7p2': '466'}