LACP is a protocol to bundel several physical network cards together to one logical link. This is called MLT. It implements failover if one or more card or link fails and load balancing with different methods.

• https://en.wikipedia.org/wiki/Link_aggregation#Link_Aggregation_Control_Protocol
• https://en.wikipedia.org/wiki/Multi-link_trunking

• https://www.kernel.org/doc/Documentation/networking/bonding.txt - Linux Ethernet Bonding Driver HOWTO (Latest update: 27 April 2011)

• https://en.wikipedia.org/wiki/EtherChannel
• https://en.wikipedia.org/wiki/Port_Aggregation_Protocol

If you do not have a connection between a server without active lacp and the switch with active lacp, try

1. add native vlan to allowed vlan list
2. add “no lacp suspend-individual”

• https://www.reddit.com/r/Cisco/comments/l6rs4m/lacp_suspendindividual_on_n9k/

  description ExampleSwitchConfiguration
  switchport mode trunk
  switchport trunk native vlan 999
  switchport trunk allowed vlan 999-1100
  spanning-tree port type edge
  no snmp trap link-status
  channel-group 1110 mode active
  no shutdown 
  no lacp suspend-individual