D-Link xStack DGS-3200-10 User Manual page 94

xStack
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.
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.
Link aggregation allows several ports to be grouped together and to act as a single link. This gives a bandwidth that is a multiple
of a single link's bandwidth.
Link a ggregation i s m ost co mmonly used to l ink a bandwidth i ntensive net work device or devices, suc h as a se rver, t o t he
backbone of a network.
The DGS-3200 Switch series supports the following link aggregation groups:
 The DGS-3200-10 model allows the creation of up to five link aggregation groups, each group consisting of 2 to 8 link s
(ports).
 The DGS-3200-16 model allows the creation of up to eight link aggregation groups, each group consisting of 2 to 8 links
(ports).
 The DGS-3200-24 model allows t he creation of up to twelve link a ggregation groups, each group c onsisting of 2 to 8
links (ports).
The (optional) Gigabit ports can only belong to a single link aggregation group. All of the ports in the group must be members of
the sam e VLAN, an d th eir STP stat us, static multicast, traffi c con trol; traffic seg mentation and 80 2.1p defa ult priority
configurations must be i dentical. 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 b alancing is au tomatically ap plied to th e po rts i n t he ag gregated gr oup, an d a l ink fai lure within t he g roup c auses t he
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. For STP, the path cost of the
link aggregation group is d etermined by the active port number of the link aggregation group. If t wo redundant link aggregation
groups are configured on the Switch, STP w ill block one entire group; in the same way STP will b lock a single port that has a
redundant link.
To view the following window, click L2 Features > Port Trunking:
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.
®
DGS-3200 Series Layer 2 Gigabit Ethernet Managed Switch
Figure 3 - 21. Port Trunking window
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