DGS-3200 Series Layer 2 Gigabit Ethernet Managed Switch
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VLAN, and their STP status, static multicast, traffic control; traffic segmentation and 802.1p default priority configurations must
be identical. Port locking, port mirroring and 802.1X must not be enabled on the trunk group. Further, the LACP aggregated links
must all be of the same speed and should be configured as full duplex.
The Master Port of the group is to be configured by the user, and all configuration options, including the VLAN configuration that
can be applied to the Master Port, are applied to the entire link aggregation group.
Load balancing is automatically applied to the ports in the aggregated group, and a link failure within the group causes the
network traffic to be directed to the remaining links in the group.
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.
To configure port trunking, click Trunking in the L2 Features folder to bring up the following window:
Figure 7- 15. Trunking window
To configure port trunk groups, click the Add button. To modify an existing port trunk group, click the Edit button corresponding
to the group. To delete a port trunk group, click the corresponding Delete button.
The user-changeable parameters are as follows:
Parameter Description
Algorithm
Toggle between MAC Source Dest and IP Source Dest.
Group ID (1-5)
Select an ID number for the group, between 1 and 5.
Type
This pull-down menu allows users to select between Static and LACP (Link Aggregation
Control Protocol). LACP allows for the automatic detection of links in a Port Trunking Group.
Master Port
Choose the Master Port for the trunk group using the pull-down menu.
State
Use the drop-down menu to toggle between Enabled and Disabled. This is used to turn a
port trunking group on or off. This is useful for diagnostics, to quickly isolate a bandwidth
intensive network device or to have an absolute backup aggregation group that is not under
automatic control.
Member Ports
Choose the members of a trunked group. Up to eight ports per group can be assigned to a
group.
Active Ports
Shows the ports that are currently forwarding packets.
After setting the previous parameters, click Apply to allow your changes to be implemented.
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