D-Link DGS-3630-52PC User Manual - Page 77
Example of Port Trunk Group
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DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide Figure 5-21 Example of Port Trunk Group The Switch treats all ports in a trunk group as a single port. Data transmitted to a specific host (destination address) will always be transmitted over the same port in a trunk group. This allows packets in a data stream to arrive in the same order they were sent. Link aggregation allows several ports to be grouped together and to act as a single link. This results in a bandwidth that is a multiple of a single link's bandwidth. Link aggregation is most commonly used to link bandwidth intensive network devices, such as servers, to the backbone of a network. The Switch allows the creation of up to 32 link aggregation groups, each group consisting of up to 12 links (ports). Each port can only belong to a single 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. 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. 70