Link Aggregation
Redundanz L2P
Release
5.0
04/09
11
2 Link Aggregation
There is link aggregation when there are at least two parallel redundant con-
nection lines (known as a trunk) between two devices, and these lines are
combined into one logical connection. You can use link aggregation to com-
bine up to 8 (optimally up to 4) connection lines between devices into a trunk.
The LACP (Link Aggregation Control Protocol based on IEEE 802.3ad) is a
network protocol for dynamically bundling physical network connections. The
complete bandwidth of all connection lines is available for data transmission.
In the case of a connection breaking down, the remaining connections take
over the entire data transmission (redundancy). The load distribution be-
tween the connection lines is effected dynamically.
Any combination of twisted pair and F/O cables can be used as the connec-
tion lines of a trunk. You configure all the connections so that the transmis-
sion speed and the duplex settings of the related ports are matching.
The maximum that can exit a device are
– 2 trunks for rail devices with 4 ports,
– 4 trunks for rail and MICE devices with 8-10 ports,
– 7 trunks for all other devices.
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