3Com 3824 Implementation Guide - Page 22

22 CHAPTER 2: OPTIMIZING BANDWIDTH ■ The Switch only supports a maximum of eight active ports in any individual aggregation. ■ If multiple links are connected between a unit and more than six other devices as shown in Figure 4, only six of the devices will be assigned to aggregated links. The remaining devices will each only have one link made active, that is, passing data. All other links will be made inactive to prevent loops occurring. LACP detects if one of the existing six aggregated links is removed and will then automatically assign one of the remaining devices to the aggregated link that has become free. Figure 4 How LACP works on a Switch with multiple aggregated links Switch H X Switch A AL 1 AL 2 AL 3 AL 4 AL 5 AL 6 Switch B Switch C Switch D Switch E Switch F Switch G ■ When multiple links of different speed connect two devices only the highest speed links will be aggregated. ■ A LinkUp / LinkDown trap will only be sent for individual links. The Traps will not be sent for an aggregation. When setting up an aggregated link, note that: ■ The ports at both ends of a member link must be configured as members of an aggregated link, if you are manually configuring aggregated links. ■ A member link port can only belong to one aggregated link.