17–2 MULTILINK ML3000 ETHERNET COMMUNICATIONS SWITCH – INSTRUCTION MANUAL
LACP CHAPTER 17: LACP
• All trunk ports must be on the same module. Trunk ports cannot be spread out across
different modules
• All trunk ports MUST have the same speed setting. If the speed is different, LACP
shows an error indicating speed mismatch
• Many switches do not forward the LACPDUs by default. So, it is possible to hook up
multiple ports to these switches and create an Ethernet loop. (In many cases this is
prevented by Spanning Tree running on these switches)
• All ports in a trunk group should be members of the same VLAN. Each port can be a
member of multiple VLANs, but each port should have at least one VLAN that is
common to both the port groups
• The LACPDU packets are sent out every 30 seconds. It is possible that in configuring
LACP, a loop can be created until LACP notification is completed. It is recommended to
configure LACP first and then physically connect the ports to avoid this potential issue
• Port Security does not work with the ports configured for LACP
• IGMP works with the primary LACP port only. All IGMP traffic is sent via a primary port.
If needed, this port can be mirrored for traffic analysis
• RSTP has to be enabled to ensure a quick recovery. If RSTP is not enabled, STP is used
for link recovery and it will be slow
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