Hi,
Since each Eth-Trunk can have a maximum of eight member interfaces. Therefore, when a stack contains nine member switches, one Eth-Trunk cannot provide MAD links for all the member switches. In this case, configure multiple Eth-Trunks to ensure that a MAD link is available between every two member switches. In the following figure, Eth-Trunk1 provides MAD links for Switch1 through Switch8, Eth-Trunk2 provides MAD links for Switch2 through Switch9, and Eth-Trunk3 provides MAD links for Switch1 and Switch9.
