Port Settings

Use this screen to view and configure switch port settings.

Port

The port settings page allows you change the configuration of the ports on the switch in order to find the best balance of speed and flow control according to your preferences. Configuring Gigabit ports require additional factors to be considered when arranging your preferences for the switch compared to 10/100 ports.

Items	Descriptions
Port	Displays the port number.
Link Status	Indicates whether the link is up or down.
Mode	Select the speed and the duplex mode of the Ethernet connection on this port. Selecting Auto (auto-negotiation) allows one port to negotiate with a peer port automatically to obtain the connection speed and duplex mode that both ends support. When auto-negotiation is turned on, a port on the switch negotiates with the peer automatically to determine the connection speed and duplex mode. If the peer port does not support auto-negotiation or turns off this feature, the switch determines the connection speed by detecting the signal on the cable and using half duplex mode. When the switch's auto-negotiation is turned off, a port uses the pre-configured speed and duplex mode when making a connection, thus requiring you to make sure that the settings of the peer port are the same in order to connect.
Flow Control	A concentration of traffic on a port decreases port bandwidth and overflows buffer memory causing packet discards and frame losses. Flow Control is used to regulate transmission of signals to match the bandwidth of the receiving port. The switch uses IEEE 802.3x flow control in full duplex mode and backpressure flow control in half duplex mode. IEEE 802.3x flow control is used in full duplex mode to send a pause signal to the sending port, causing it to temporarily stop sending signals when the receiving port memory buffers fill. Back Pressure flow control is typically used in half duplex mode to send a "collision" signal to the sending port (mimicking a state of packet collision) causing the sending port to temporarily stop sending signals and resend later.

Port Isolation

Port Isolation feature provides L2 isolation between ports within the same broadcast domain. When enabled, Isolated ports can forward traffic to Not Isolated ports, but not to other Isolated ports. Not Isolated ports can send traffic to any port whether Isolated or Not Isolated. The default setting is Not Isolated.

Click Apply to update the system settings.

Mirror

Mirror settings mirror network traffic by forwarding copies of incoming and outgoing packets from specific ports to a monitoring port. The packet that is copied to the monitoring port will be the same format as the original packet.

Port mirroring is useful for network monitoring and can be used as a diagnostic tool. Use port mirroring to send traffic to applications that analyze traffic for purposes such as monitoring compliance, detecting intrusions, monitoring, and predicting traffic patterns, and other correlating events. Port mirroring is needed for traffic analysis on a switch because a switch normally sends packets only to the port to which the destination device is connected. The analyzer captures and evaluates the data without affecting the client on the original port. Port mirroring can consume significant CPU resources while active, so be cautious of such usage when configuring the switch.

Items	Descriptions
Session ID	A number identifying the mirror session. This switch only supports up to 4 mirror sessions.
Destination Port	Select the port for traffic purposes from source ports mirrored to this port.
Egress/Ingress (Source TX/RX Port)	Sets the source port from which traffic will be mirrored. TX Port: Only frames transmitted from this port are mirrored to the destination port. RX Port: Only frames received on this port are mirrored to the destination port. Both: Frames received and transmitted on this port are mirrored to the specified destination port. None: Disables mirroring for this port.
Egress & Ingress State	Select whether to enable or disable ingress traffic forwarding.
Session State	Select whether to enable or disable port mirroring.

Jumble Frame

Ethernet has used the 1500-byte frame size since its inception. Jumbo frames are network-layer PDUs that have a size much larger than the typical 1500-byte Ethernet Maximum Transmission Unit (MTU) size. Jumbo frames extend Ethernet to 9000 bytes, making them large enough to carry an 8 KB application datagram plus packet header overhead. If you intend to leave the local area network at high speeds, the dynamics of TCP will require you to use large frame sizes.

The switch supports a jumbo frame size of up to 9216 bytes. Jumbo frames need to be configured to work on the ingress and egress port of each device along the end-to-end transmission path. Furthermore, all devices in the network must also be consistent on the maximum jumbo frame size, so it is important to do a thorough investigation of all your devices in the communication paths to validate their settings.

Items	Description
Jumbo Frame	Enter the size of jumbo frame. The range is from 1522 to 9216 bytes.

Click Apply to update the system settings.

LLDP

Link Layer Discovery Protocol (LLDP) is the IEEE 802.1AB standard for switches to advertise their identity, major capabilities, and neighbors on the 802 LAN. LLDP allows users to view the discovered information to identify system topology and detect faulty configurations on the LAN. LLDP is essentially a neighbor discovery protocol that uses Ethernet connectivity to advertise information to devices on the same LAN and store information about the network. The information transmitted in LLDP advertisements flow in one direction only: from one device to its neighbors. This information allows the device to quickly identify a variety of other devices, resulting in a LAN that interoperates smoothly and efficiently.

LLDP transmits information as packets called LLDP Data Units (LLDPDUs). A single LLDPDU is transmitted within a single 802.3 Ethernet frame. A basic LLDPDU consists of a set of Type-Length-Value elements (TLV), each of which contains information about the device. A single LLDPDU contains multiple TLVs. TLVs are short information elements that communicate complex data. Each TLV advertises a single type of information.

Global Settings

Select whether to enable or disable the LLDP feature on the switch. Next, enter the Transmission Interval, Holdtime Multiplier, Reinitialization Delay parameter, and the Transmit Delay parameter. When finished, click Apply to update the system settings.

State	Select Enabled or Disabled to activate LLDP for the switch.
Transmission Interval	Enter the interval at which LLDP advertisement updates are sent. The default value is 30. The range is from 5 to 32768.
Holdtime Multiplier	Enter the amount of time that LLDP packets are held before packets are discarded and measured in multiples of the Advertised Interval. The default is 4. The range is from 2 to 10.
Reinitialization Delay	Enter the amount of time of delay before reinitializing LLDP. The default is 2. The range is from 1 to 10.
Transmit Delay	Enter the amount of time that passes between successive LLDP frame transmissions. The default is 2 seconds. The range is from 1 to 8191 seconds.

Local Device

LLDP devices must support chassis and port ID advertisement, as well as the system name, system ID, system description, and system capability advertisements. Here, you can view detailed LLDP information for the switch.

Chassis ID Subtype	Displays the chassis ID type.
Chassis ID	Displays the chassis ID of the device transmitting the LLDP frame.
System Name	Displays the administratively assigned device name.
System Description	Describes the device.
Capabilities Supported	Describes the device functions.
Capabilities Enabled	Describes the device functions.
Port ID Subtype	Displays the port ID type.

Remote Device

LLDP devices must support chassis and port ID advertisement, as well as the system name, system ID, system description, and system capability advertisements. From here you can view detailed LLDP Information for the remote device.

Items	Descriptions
Port	Displays the port.
Chassis ID Subtype	Displays the chassis ID type.
Chassis ID	Displays the chassis ID of the device that is transmitting the LLDP frame.
Port ID Subtype	Displays the port ID type.
Remote ID	Displays the remote ID.
System Name	Displays the administratively assigned device name.
Time to Live	Displays the time to live.
Auto-Negotiation Supported	Displays state for the auto-negotiation supported.
Auto-Negotiation Enabled	Displays state for the auto-negotiation enabled.
Auto-Negotiation Advertised Capabilities	Displays the type of auto-negotiation advertised capabilities.
Operational MAU Type	Displays the type of MAU.
802.3 Maximum Frame Size	Displays the maximum size of 802.3 maximum frame.
802.3 Link Aggregation Capabilities	Displays the 802.3 Link Aggregation capabilities.
802.3 Link Aggregation Status	Displays the status of 802.3 Link Aggregation.
802.3 Link Aggregation Port ID	Displays the port ID of 802.3 Link Aggregation.

Multicast Filtering

Select Enabled or Disabled for Multicast Filtering. Click Apply to save settings.

EEE

Energy Efficient Ethernet (EEE), an Institute of Electrical and Electronics Engineers (IEEE) 802.3az standard, reduces the power consumption of physical layer devices during periods of low link utilization. EEE saves energy by allowing PHY non-essential circuits to shut down when there is no traffic.

Network administrators have long focused on the energy efficiency of their infrastructure, and the EnGenius Layer 2 switch complies with the IEEE’s Energy-Efficient Ethernet (EEE) standard. The EEE compliant switch offers users the ability to utilize power that Ethernet links use only during data transmission. Lower Power Idle (LPI) is the method for achieving the power saving during Ethernet ideal time.

Use the EEE configuration page to configure Energy Efficient Ethernet.

Item	Description
Port	Display the port for which the EEE setting is displayed.
EEE Status	Enable or disable EEE for the specified port.

Click Apply to save settings.