Traffic Control - D-Link DES-3526 User Manual
Layer 2 managed stackable fast ethernet switch
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xStack DES-3526 / DES-3526DC Layer 2 Stackable Fast Ethernet Managed Switch User Manual
GVRP
The Group VLAN Registration Protocol (GVRP) enables the port to dynamically become a
member of a VLAN. GVRP is Disabled by default.
Ingress
This field can be toggled using the space bar between Enabled and Disabled. Enabled enables
the port to compare the VID tag of an incoming packet with the PVID number assigned to the
port. If the two are different, the port filters (drops) the packet. Disabled disables ingress fil-
tering. Ingress Checking is Disabled by default.
Acceptable Frame
This field denotes the type of frame that will be accepted by the port. The user may choose
Type
between Tagged Only, which means only VLAN tagged frames will be accepted, and Admit_All,
which mean both tagged and untagged frames will be accepted. Admit_All is enabled by
default.
Click Apply to implement changes made.
Traffic Control
Use the Traffic Control Setting window to enable or disable storm control and adjust the threshold for multicast and broadcast
storms, as well as DLF (Destination Look Up Failure). Traffic control settings are applied to individual Switch modules. To view
the following window, click Configuration > VLANs > Traffic Control:
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, first select a group of ports by using the Group pull-down menu. As seen in the figure above, this
section is set by 5 specified groups of ports on the Switch.
Group 1 refers to ports 1 through 8;
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Group 2 refers to ports 9 through 16;
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Group 3 refers to ports 17 through 24;
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Group 4 refers to mini GBIC port 25;
•
Group 5 refers to mini GBIC port 26.
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Broadcast Storm, Multicast Storm and Destination Unknown may be Enabled or Disabled for either group.
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 Kpps, received by the Switch that will trigger the storm traffic control measures. The Threshold
value can be set from 0 to 255 kilo packets. The default setting is 128. The settings of each port may be viewed in the Traffic
Control Table in the same window. Click Apply to implement changes made.
Figure 6- 43. Traffic Control Setting window
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