FoxGate S63 series, Руководство по настройке

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Port Channel Configuration
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10. Port Channel Configuration
10.1
Introduction to Port Channel
To understand Port Channel, Port Group should be introduced first. Port Group is a
group of physical ports in the configuration level; only physical ports in the Port Group can
take part in link aggregation and become a member port of a Port Channel. Logically, Port
Group is not a port but a port sequence. Under certain conditions, physical ports in a Port
Group perform port aggregation to form a Port Channel that has all the properties of a
logical port, therefore it becomes an independent logical port. Port aggregation is a
process of logical abstraction to abstract a set of ports (port sequence) with the same
properties to a logical port. Port Channel is a collection of physical ports and used logically
as one physical port. Port Channel can be used as a normal port by the user, and can not
only add network‘s bandwidth, but also provide link backup. Port aggregation is usually
used when the switch is connected to routers, PCs or other switches.
Fig 10-1 Port aggregation
As shown in the above, S1 is aggregated to a Port Channel, the bandwidth of this
Port Channel is the total of all the four ports. If traffic from S1 needs to be transferred to S2
through the Port Channel, traffic allocation calculation will be performed based on the
source MAC address and the lowest bit of target MAC address. The calculation result will
decide which port to convey the traffic. If a port in Port Channel fails, the other ports will
undertake traffic of that port through a traffic allocation algorithm. This algorithm is carried
out by the hardware.
Switch offers two methods for configuring port aggregation: manual Port Channel
creation and LACP (Link Aggregation Control Protocol) dynamic Port Channel creation.
S1
S2