Functional description, Jumbo frame, Flow control and back pressure – LevelOne GES-0852 User Manual

Page 10: Mirror, Vlan, Trunk (aggregation), Quality of service (qos), Snmp, Umbo, Rame

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Functional Description

Jumbo Frame

With Jumbo Frame supported, it is allowed for the switch to transport identical data in
fewer frames. Hence helps to ensure fewer overheads, shorten processing time, and
reduce interrupts.
Note: To enable Jumbo Frame, Flow Control should be enabled in advance.

Flow Control and Back Pressure

Flow Control and Back Pressure both contributes for lower and higher speed devices
to communicate to each other hence ensures the correctness of data transmitting.
The 802.3x Flow Control and Back Pressure mechanisms work respectively for full
and half duplex modes. Flow Control can be enabled or disabled on a per-port basis.

Mirror

The Mirror function provides network administrator to monitor the traffic. By
forwarding a copy of the packets that received or transferred by the monitored port,
the sniffer port received all the packets and hence is able to monitor the traffic of the
specified port.

VLAN

With VLAN supported, the network can be segmented in groups to reduce the
collisions from widely broadcasting. The device supports both port-based VLAN and
802.1Q tag-based VLAN. Port-based VLAN classifies incoming packets to VLANs
according to their ingress port. The 802.1Q based VLAN add a tag to the header of
the packet to classify their VLANs.

Trunk (Aggregation)

The Trunk functionality integrates several ports to enlarge the bandwidth that helps to
boost the backbone connectivity. The switch allows the Maximum 4 group and 8
members for each group.

Quality of Service (QoS)

The QoS service classifies packets into different precedence. The packets are
transmitted and received by their classified priorities. This mechanism helps high
bandwidth demanded applications such as VoIP to get an unobstructed connection.

SNMP

This device is SNMP(Simple Network Management Protocol)-management
supported. This allows this product to be monitored or inspected by a SNMP
management station.

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