D-Link DES-3350SR User Manual page 61

D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 32. Link Aggregation Group
Data transmitted to a specific host (destination address) will always be transmitted over the same port in a link aggregation group.
This allows packets in a data stream to arrive in the same order they were sent. An aggregated link connection can be made with
any other switch that maintains host-to-host data streams over a single link aggregate port. Switches that use a load-balancing
scheme that sends the packets of a host-to-host data stream over multiple link aggregation ports cannot have an aggregated
connection with the DES-3350SR switch.
Link aggregation is most commonly used to link a bandwidth intensive network device or devices – such as a server – to the
backbone of a network.
The switch allows the creation of up to six link aggregation groups, each group consisting of up to eight links (ports). All of the
ports in the group must be members of the same VLAN. Further, the aggregated links must all be of the same speed and should be
configured as full duplex.
The Spanning Tree Protocol will treat a link aggregation group as a single link. 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 link aggregation, click on the Link Aggregation hyperlink in the Configuration folder to bring up the Link
Aggregation Group Entries table:
Figure 7 - 33. Port Link Aggregation Group window
To configure link aggregation, click the Add button to add a new group and use the Link Aggregation Settings menu (see
example below) to set up groups. To modify a group, click Modify on the corresponding to the entry you wish to alter. To delete a
link aggregation group, click the corresponding button under the Delete heading in the Current Link Aggregation Group Entries
table.
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