Draytek VigorSwitch G2080, User Manual, Page: 42 / 120

VigorSwitch G2080 User’s Guide 36
transmitted and received via this port. When it is disabled,
no traffic can be transferred through this port. Port State is
configured by user.
Default:
Enabled.
Auto Negotiation: Show the exchange mode of Ethernet MAC. There are two
modes supported in the switch. They are auto-negotiation
mode “Enabled” and forced mode “Disabled”. When in
“Enabled” mode, this function will automatically negotiate
by hardware itself and exchange each other the capability of
speed and duplex mode with other site which is linked, and
comes out the best communication way. When in “Disabled”
mode, both parties must have the same setting of speed and
duplex, otherwise, both of them will not be linked. In this
case, the link result is “Down”.
Default: Enabled
Speed / Duplex Mode: Display the speed and duplex of all port. There are three
speeds 10Mbps, 100Mbps and 1000Mbps supported for TP
media, and the duplex supported is half duplex and full
duplex. If the media is 1Gbps fiber, it is 1000Mbps
supported only. The status of speed/duplex mode is
determined by 1) the negotiation of both local port and link
partner in “Auto Speed” mode or 2) user setting in “Force”
mode. The local port has to be preset its capability.
Default: None, depends on the result of the negotiation.
Flow Control: Show each port’s flow control status.
There are two types of flow control in Ethernet,
Backpressure for half-duplex operation and Pause flow
control (IEEE802.3x) for full-duplex operation. The switch
supports both of them.
Default: Disabled
Wait State: For 10/100M ports, there is no side effect on this setting.
For Gigabit ports, setting of Wait-State will remove the issue
with ignored pause frames but resolve in the minimum
interframe gap being at least 14 bytes instead of the usual 12
bytes. This applies for uncongested traffic as well. The
larger interframe gap will result in throughput rates less than
100%. For example, a stream of 64-byte frames and a stream
of 1518-byte frames, their maximum throughput is 97.7%
and 99.9% respectively.