D-Link DGS-3312SR Product Manual - Link Aggregation
DGS-3312SR Gigabit Layer 3 Switch
Figure 4- 7. Traffic Control Setting window
Traffic or storm control is used to stop broadcast, multicast or ARP request storms that may result when a loop is created.
The Destination Look Up Failure control is a method of shutting down a loop when a storm is formed because a MAC
address cannot be located in the Switch’s forwarding database and it must send a packet to all ports or all ports on a
VLAN.
To configure Traffic Control, select the Unit (Unit ID of a Switch in a Switch stack
− 15 for a Switch in standalone mode)
you want to configure. Broadcast Storm, Multicast Storm and Destination Look Up Failure may be Enabled or Disabled.
The Threshold value is the upper threshold at which the specified traffic control is switched on. This is the number of
Broadcast, Multicast or DLF packets, in Kbps, received by the Switch that will trigger the storm traffic control measures.
The Threshold value can be set from 0 to 255 packets. The Default setting is 128.
Link Aggregation
The Switch allows the creation of up to six link aggregation groups, each group consisting of up of up to eight links (ports).
The aggregated links must be contiguous (they must have sequential port numbers) except the two (optional) Gigabit ports
– which can only belong to a single link aggregation group. A link aggregation group may not cross an 8-port boundary,
starting with port 1 (a group may not contain ports 8 and 9, for example) and 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 configuration of the lowest numbered port in the group becomes the configuration for all of the ports in the
aggregation group. This port is called the Master Port of the group, 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.
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