542 | Link Aggregation Control Protocolw w w . d e l l . c o m | s u p p o r t . d e l l . c o m LACP functions by constantly exchanging custom MAC PDUs across LAN Ethernet links. The protocolpackets are only exchanged between ports that are configured as LACP capable.Important Points to Remember• On ExaScale, LACP is supported on 200 physical ports. Use static LAGs for the remaining ports toavoid unpredictable results.• LACP enables you to add members to a port channel (LAG) as long as it has no static members.Conversely, if the LAG already contains a statically defined member (channel-member command),the port-channel mode command is not permitted.• A static LAG cannot be created if a dynamic LAG using the selected number already exists.• No dual membership in static and dynamic LAGs:• If a physical interface is a part of a static LAG, then the command port-channel-protocol lacp willbe rejected on that interface.• If a physical interface is a part of a dynamic LAG, it cannot be added as a member of a static LAG.The command channel-member gigabitethernet x/y will be rejected in the static LAG interfacefor that physical interface.• A dynamic LAG can be created with any type of configuration.• There is a difference between the shutdown and no interface port-channel:— The shutdown command on LAG “xyz” disables the LAG and retains the usercommands. However, the system does not allow the channel number “xyz” to be staticallycreated.— The command no interface port-channel channel-number deletes the specified LAG,including a dynamically created LAG. This command causes all LACP-specificcommands on the member interfaces to be removed. The interfaces are restored to a statethat is ready to be configured.Note: There will be no configuration on the interface since that condition is required for aninterface to be part of a LAG.• Link dampening can be configured on individual members of a LAG. See Link Debounce Timer onpage 446 for more information.• LACP cannot add an interface to a LAG if one of the LAG members is shut down on the remoteinterface. If a remote LAG member is shut down, Message 1 appears on the local system when youattempt to add a member. In this case, enable all members of the LAG on the remote system, and thenadd any new members on the local system.• FTOS might not synch connected and static routes learned via LACP to the secondary RPM.Configure redundancy protocol lacp to synch LACP states between RPMs.Message 1 LACP Remote Port Down Error Message% Error: This port property does not match with other LAG member.
