User Guide

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12.2.2 WAN speed
The speed of an Ethernet physical port is determined through negotiation with its peer device. The
negotiated speed can be any speed within the interface capability. You can try to modify the speed
and duplex mode when network connection issues occur.
Duplex modes supported by the router and their scenarios:
Speed and Duplex
Applicable scenario
Auto Negotiation
The duplex mode of the port is determined through auto negotiation between the
router and its peer device.
You are recommended to keep the default settings since auto negotiation is the default
option for most of Ethernet network devices.
If the router uses auto negotiation, while its peer uses non-auto negotiation, the
negotiated duplex mode is half duplex.
10/100/1000 Mbps
Full Duplex
The interface can receive and send packets simultaneously, leading to low latency and
high efficiency. 10/100/1000 Mbps indicates the maximum link speed that both ends
can negotiate. Only W18E and W20E support 1000 Mbps Full Duplex.
You are recommended to use the same speed link and duplex modes for both ends.
Otherwise, network connection issues may occur.
10/100 Mbps Half
Duplex
The interface can either receive or send packets at a time. 10/100Mbps indicates the
maximum link speed that both ends can negotiate.
You are recommended to use the same speed link and duplex modes for both ends.
Otherwise, network connection issues may occur.