Dell PowerEdge M520 Dell PowerConnect M6220/M6348/M8024/M8024-k CLI Referen - Page 574

A LAG can be either static or dynamic not both. It cannot have some members participate in the protocol while other members not participate. Additionally, it is not possible to change a LAG from static to dynamic via the CLI. You must remove the member ports from the static LAG and then add them to the dynamic LAG. VLANs and LAGs When members are added to a LAG, they are removed from all existing VLAN membership. When members are removed from a LAG, the members rejoin the VLANs that they were previously members of as per the configuration file. The LAG interface can be a member of a VLAN complying with IEEE 802.1Q. LAG Thresholds In many implementations, a LAG is declared as up if any one of its member ports is active. This enhancement provides configurability for the minimum number of member links to be active to declare a LAG up. Network administrators can also utilize this feature to automatically declare a LAG down when only some of the links have failed. Port Channels Trunking, which is also called Port Channels or Link Aggregation, is initiated and maintained by the periodic exchanges of Link Aggregation Control PDUs (LACPDUs). When LACP is enabled for a physical interface, LACPDUs must not be dropped for any reason. Conversely, when LACP is disabled for the physical interface LACPDUs must be dropped. From a system perspective, a LAG is treated as a physical port. A LAG and a physical port use the same configuration parameters for administrative enable/disable, port priority, and path cost. When a physical port is configured as part of a LAG, it no longer participates in forwarding operations until the LAG becomes active. 574 Port Channel Commands