User manual

4 Configuration DES-1210 Metro Ethernet Managed Switch User Manual
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Figure 4.91 - Configuration > Multicast Forwarding & Filtering > Multicast Filtering
From Port / To Port: Specify the ports of the VLAN on which the corresponding MAC address belongs to.
Multicast Filtering Mode: This drop-down menu allows you to select the action the Switch will take when it
receives a multicast packet that is to be forwarded to one of the ports in the range specified above.
Forward Unregistered Groups - This will instruct the Switch to forward a multicast packet whose
destination is an unregistered multicast group residing within the range of ports specified above.
Filter Unregistered Groups - This will instruct the Switch to filter any multicast packets whose
destination is an unregistered multicast group residing within the range of ports specified above.
QoS > Traffic Control
The Traffic Control feature provides the ability to control the receive rate of broadcast, multicast, and
unknown unicast packets. Once a packet storm has been detected, the Switch will drop packets coming into
the Switch until the storm has subsided.
Figure 4.92 – QoS > Traffic Control
From Port/To Port: A consecutive group of ports may be configured starting with the selected port.
Drop Threshold (64Kbps * N): If storm control is enabled (default is disabled), the threshold is from of 64 ~
1,024,000 Kbit per second, with steps (N) of 64Kbps. N can be from 1 to 16000.
Action: Select the method of traffic control from the pull down menu. The choices are:
Drop – Utilizes the hardware Traffic Control mechanism, which means the Switch’s hardware will
determine the Packet Storm based on the Threshold value stated and drop packets until the issue is
resolved.
Shutdown – Utilizes the Switch’s software Traffic Control mechanism to determine the Packet Storm
occurring. Once detected, the port will deny all incoming traffic to the port except STP BPDU packets,
which are essential in keeping the Spanning Tree operational on the Switch. If the countdown timer
has expired and yet the Packet Storm continues, the port will be placed in rest mode and if no action
is taken will enter auto-recovery mode after a five minute period. Choosing this option obligates the
user to configure the interval setting as well, which will provide packet count samplings from the
Switch’s chip to determine if a Packet Storm is occurring.
Count Down (0 or 5-30): The count down timer is set to determine the amount of time, in minutes, that the
Switch will wait before shutting down the port that is experiencing a traffic storm. This parameter is only
useful for ports configured as Shutdown in their Action field and therefore will not operate for Hardware