NPort Networks N1-8016, Руководство пользователя

Страница: 34 / 45

8000 Series User’s Manual, Release 1.3
Delete : Click to delete the VLAN group.
Delete All : Click to delete all the VLAN groups.
Note: When Port-Based VLAN is enabled, the 802.1Q VLAN settings and 802.1Q management VLAN
settings will be set to Disabled as default. By default, all ports are untagged.
4.4.15 Advanced Settings > QoS
QoS is an implementation of the IEEE 802.1p standard that allows network administrators to reserve band-
width for important functions that require a larger bandwidth or that might have a higher priority, such as
VoIP (voice-over Internet Protocol), web browsing applications, file server applications or video conferencing.
Thus with larger bandwidth, less critical traffic is limited, and therefore excessive bandwidth can be saved.
The following figure displays the status of Quality of Service priority levels of each port, higher priority
means the traffic from this port will be first handled by the switch. For packets that are untagged, the
switch will assign the priority depending on your configuration.
Fig. 4.29: Advanced Settings > QoS
Scheduler Method: Select Strict Priority to process the packets with the highest priority first. Select
WRR (Weighted Round-Robin) to process packets according to the weight of each priority. When
a priority level has reached its egress weight, the system will process the packets in the next level
even if there are remaining packets. NPort WebSmart Switch system
’ s weight of priority levels are: 8
(Highest), 4 (High), 2 (Medium) and 1 (Low) packet. By default, the queuing mechanism is Strict
Priority .
4.4.16 Advanced Settings > Bandwidth Control > Storm Control
The Storm 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.
30 Chapter 4. Getting Started