Cisco 3850

wireshark on switch

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/117639-configure-wireshark-00.html

capture reference

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/epc/command/epc-cr-book/epc-cr-m1.html#wp1398253443

mac tftp server

https://rick.cogley.info/post/run-a-tftp-server-on-mac-osx/

config fragments

!
vlan 99
 name 99
!

interface GigabitEthernet1/0/11
 description smesxi-vmnic1
 switchport mode trunk

3850(config)#int Gi1/0/11
3850(config-if)#switchport trunk allowed vlan all

trunking

interface GigabitEthernet1/0/23
 description ubnt24-uplink2
 switchport mode trunk
 channel-group 1 mode active
!
interface GigabitEthernet1/0/24
 description ubnt24-uplink1
 switchport mode trunk
 channel-group 1 mode active
!