Operation Manual – Link AggregationH3C S7500 Series Ethernet Switches Chapter 1 Link Aggregation Configuration1-7Table 1-3 Restriction of non-type-A LPUs on link aggregationLPU type Cross-chipaggregationAggregationtypeMaximumnumber ofports in anaggregationgroupMaximumnumber ofselectedports in anaggregationgroupManualaggregation 8 8Non-type-ALPU SupportedStatic/dynamicaggregationThe number ofports on theLPU81.1.8 Aggregation Group CategoriesDepending on whether or not load sharing is implemented, aggregation groups can beload-sharing or non-load-sharing aggregation groups.In general, the system only provides limited load-sharing aggregation resources(currently up to 64 load-sharing aggregation groups can be created), so the systemneeds to reasonably allocate the resources among different aggregation groups.The system always allocates hardware aggregation resources to the aggregationgroups with higher priorities. When load-sharing aggregation resources are used up byexisting aggregation groups, newly-created aggregation groups will benon-load-sharing ones.The priorities of aggregation groups for allocating load-sharing aggregation resourcesare as follows:z An aggregation group containing special ports (such as 10GE port) which requirehardware aggregation resources has higher priority than any aggregation groupcontaining no special port.z A manual or static aggregation group has higher priority than a dynamicaggregation group (unless the latter contains special ports while the former doesnot).z For two aggregation groups, the one that might gain higher speed if resourceswere allocated to it has higher priority than the other one.z If the two groups can gain the same speed after resources are allocated to them,the one with smaller master port number has higher priority than the other one.When an aggregation group of higher priority appears, the aggregation groups of lowerpriorities release their hardware resources. For single-port aggregation groups, if theycan transceive packets normally without occupying aggregation resources, they will notoccupy hardware aggregation resources.
