822 Configuring Link AggregationHow Do LAGs Interact with Other Features?From a system perspective, a LAG is treated just as a physical port, with thesame configuration parameters for administrative enable/disable, spanningtree port priority, path cost as may be for any other physical port.VLANWhen members are added to a LAG, they are removed from all existingVLAN membership. When members are removed from a LAG they are addedback to the VLANs that they were previously members of as per theconfiguration file. Note that a port’s VLAN membership can still beconfigured when it's a member of a LAG. However this configuration is onlyactually applied when the port leaves the LAG.The LAG interface can be a member of a VLAN complying with IEEE802.1Q.STPSpanning tree does not maintain state for members of a LAG, but theSpanning Tree does maintain state for the LAG interface. As far as STP isconcerned, members of a LAG do not exist. (Internally, the STP state of theLAG interface is replicated for the member links.)When members are deleted from a LAG they become normal links, andspanning tree maintains their state information.StatisticsStatistics are maintained for all LAG interfaces as they are done for thephysical ports, besides statistics maintained for individual members as per the802.3ad MIB statistics.
