M A G N U M 6 K S W I T C H E S , M N S - 6 K U S E R G U I D EThe performance is improved because the capacity of an aggregated link is higherthan each individual link alone. 10Mbps or 10/100Mbps or 100Mbps ports can begrouped together to form one logical link.Instead of adding new hardware to increase speed on a trunk – one can now useLACP to incrementally increase the throughput in the network, preventing ordeferring hardware upgrades. Some known issues with LACP on the Magnum 6Kfamily of switches are:• LACP will not work on Half Duplex ports.• All trunk ports must be on the same module. Trunk portscannot be spread out across different modules.• All trunk ports MUST have the same speed setting. If thespeed is different, LACP shows an error indicating speed mismatch.• Many switches do not forward the LACPDUs by default. So, it is possible tohook up multiple ports to these switches and create an Ethernet loop. (In manycases 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 canbe a member of multiple VLANs, but each port should have at least one VLANthat is common to both the port groups.• The LACPDU packets are sent out every 30 seconds. It is possible that inconfiguring LACP, a loop can be created until LACP notification is completed. Itis recommended to configure LACP first and then physically connect the portsto avoid this potential issue.• Port Security will not work with the ports configured for LACP.• IGMP will work with the primary LACP port only. All IGMP traffic is sent via aprimary port. If needed, this port can be mirrored for traffic analysis.LACP ConfigurationFor LACP to work on the Magnum 6K family of switches, only one trunk per module canbe created. Some valid connections are shown in the picture below.Switch 2Switch 1Switch 1Switch 2194
