Draytek VigorSwitch G2080, User Manual, Page: 89 / 120

VigorSwitch G2080 User’s Guide 83
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The Port Trunking Configuration is used to configure the settings of Link Aggregation.
You can bundle more than one port with the same speed, full duplex and the same MAC to
be a single logical port, thus the logical port aggregates the bandwidth of these ports. This
means you can apply your current Ethernet equipments to build the bandwidth aggregation.
For example, if there are three Fast Ethernet ports aggregated in a logical port, then this
logical port has bandwidth three times as high as a single Fast Ethernet port has.
The switch supports two kinds of port trunking methods:
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Ports using Link Aggregation Control Protocol (according to IEEE 802.3ad specification)
as their trunking method can choose their unique LACP GroupID (1~8) to form a logic
“trunked port”. The benefit of using LACP is that a port makes an agreement with its peer
port before it becomes a ready member of a “trunk group” (also called aggregator). LACP
is safer than the other trunking method - static trunk.
The switch LACP does not support the followings:
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Link Aggregation across switches
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Aggregation with non-IEEE 802.3 MAC link
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Operating in half-duplex mode
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Aggregate the ports with different data rates
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Ports using Static Trunk as their trunk method can choose their unique Static GroupID
(also 1~8, this Static groupID can be the same with another LACP groupID) to form a logic
“trunked port”. The benefit of using Static Trunk method is that a port can immediately
become a member of a trunk group without any handshaking with its peer port. This is also
a disadvantage because the peer ports of your static trunk group may not know that they
should be aggregate together to form a “logic trunked port”. Using Static Trunk on both