D-Link DGS-1100-16 Reference Manual page 59

The Spanning Tree Protocol will treat a link aggregation group as a single link, on the switch level.
On the port level, the STP will use the port parameters of the Master Port in the calculation of port
cost and in determining the state of the link aggregation group. If two redundant link aggregation
groups are configured on the Switch, STP will block one entire group; in the same way STP will
block a single port that has a redundant link.
NOTE: If any ports within the trunk group become disconnected,
packets intended for the disconnected port will be load shared
among the other linked ports of the link aggregation group.
This window is used to view and configure the link aggregation settings.
To view the following window, click L2 Features > Link Aggregation, as shown below:
The fields that can be configured for Channel Group Information are described below:
Parameter
From Port / To Port
Group ID
Mode
Click the Add button to add a new entry based on the information entered.
Click the Delete Member Port button to remove the specific member port.
Click the Delete Channel button to remove the specific entry.
Click the Channel Detail button to view more detailed information about the channel.
Figure 7-256 Link Aggregation window
Description
Select the appropriate port range used for the configuration
here.
Enter the channel group number here. The system will
automatically create the port-channel when a physical port
first joins a channel group. An interface can only join one
channel-group.
Select the mode option here. Options to choose from are On,
Active, and Passive. If the mode On is specified, the
channel group type is static. If the mode Active or Passive is
specified, the channel group type is LACP. A channel group
can only consist of either static members or LACP members.
Once the type of channel group has been determined, other
types of interfaces cannot join the channel group.
Active - Active LACP ports are capable of processing and
sending LACP control frames. This allows LACP compliant
devices to negotiate the aggregated link so the group may be
changed dynamically as needs require. In order to utilize the
ability to change an aggregated port group, that is, to add or
subtract ports from the group, at least one of the participating
devices must designate LACP ports as active. Both devices
must support LACP.
Passive - LACP ports that are designated as passive cannot
initially send LACP control frames. In order to allow the
linked port group to negotiate adjustments and make
changes dynamically, one end of the connection must have
"active" LACP ports
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D-Link DGS-1100 Series Switch User Manual