LevelOne FSW-1671 - Manual (Page 32)

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Trunk setting
Port trunk allows multiple links to be bundled together and act as a single physical link
for increased throughput. It provides load balancing, and redundancy of links in a
switched inter-network. Actually, the link does not have an inherent total bandwidth
equal to the sum of its component physical links. Traffic in a trunk is distributed across
an individual link within the trunk in a deterministic method that called a hash algorithm.
The hash algorithm automatically applies load balancing to the ports in the trunk. A port
failure within the trunk group causes the network traffic to be directed to the remaining
ports. Load balancing is maintained whenever a link in a trunk is lost or returned to
service. This switch may use Port ID, Source MAC Address, Destination MAC Address,
or a combination of Source MAC Address and Destination MAC Address to be the
selection for Trunk Hash Algorithm. Traffic pattern on the network should be considered
carefully before applying it. When a proper hash algorithm is used, traffic is kind of
randomly decided to be transmitted across either link within the trunk and load
balancing will be seen.
FSW-1671 smart switch supports two trunk group, each trunk consists of 2~4 ports.
Trunk hash algorithm can be selected according to 4 different methods.