1-2Table 1-1 Consistency considerations for ports in an aggregationCategory ConsiderationsSTPState of port-level STP (enabled or disabled)Attribute of the link (point-to-point or otherwise) connected to the portPort path costSTP prioritySTP packet formatLoop protectionRoot protectionPort type (whether the port is an edge port)QoSRate limitingPriority marking802.1p priorityCongestion avoidanceTraffic redirectingTraffic accountingLink type Link type of the ports (trunk, hybrid, or access)GVRPGVRP state on ports (enabled or disabled)GVRP registration typeGARP timer settingsVLAN-VPN State of VLAN-VPN (enabled or disabled)TPID on the portsLink Aggregation ClassificationDepending on different aggregation modes, the following three types of link aggregation exist:z Manual aggregationz Static LACP aggregationz Dynamic LACP aggregationManual Aggregation GroupIntroduction to manual aggregation groupA manual aggregation group is manually created. All its member ports are manually added and can bemanually removed (it inhibits the system from automatically adding/removing ports to/from it). Eachmanual aggregation group must contain at least one port. When a manual aggregation group containsonly one port, you cannot remove the port unless you remove the whole aggregation group.LACP is disabled on the member ports of manual aggregation groups, and you cannot enable LACP onports in a manual aggregation group.Port status in manual aggregation groupA port in a manual aggregation group can be in one of the two states: selected or unselected. In amanual aggregation group, only the selected ports can forward user service packets.
