DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual

same 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 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 view this window, click L2 Features > Port Trunking as shown below:

 

Figure 3 - 24Port Trunking window

The following fields can be set

 

 

Parameter

Description

 

 

Algorithm

The algorithm that the Switch uses to balance the load across the ports that make up the port

 

trunk group is defined by this definition. Choose MAC Source, MAC Destination, MAC Source

 

Dest, IP Source, IP Destination or IP Source Dest (See the Link Aggregation section of this

 

manual).

Group ID

Select an ID number for the group, between 1 and 6.

 

 

Type

This pull-down menu allows you 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

Trunk groups can be toggled 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.

 

 

Active Port

Shows the port that is currently forwarding packets.

 

 

Member Ports

Choose the members of a trunked group. Up to eight ports per group can be assigned to a

 

group.

Flooding Port

A trunking group must designate one port to allow transmission of broadcasts and unknown

 

unicasts.

Click Apply to implement changes made.

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D-Link DGS-3700 user manual Parameter Description Algorithm, Master Port, Active Port, Member Ports, Flooding Port