Allied-telesis AT 8000/8POE User Manual Page 83

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AT-S81 Management Software User’s Guide
Section I: Using the Menus Interface 83
backup. If a port in a static trunk loses its link, the trunk’s total bandwidth is
diminished. Though the traffic carried by the lost link is shifted to one of the
remaining ports in the trunk, the bandwidth remains reduced until the lost
link is reestablished or you reconfigure the trunk by adding another port to
it.
Port Trunking
Guidelines
Observe the following guidelines when creating a port trunk:
A port trunk can consist of up to 8 ports, but must have
a minimum of 2 ports.
The switch can support up to 4 trunks at a time.
A port can belong to only one trunk at a time.
The speed, duplex mode, and flow control settings
must be the same on all the ports in a trunk.
The ports of a trunk must be members of the same
VLAN. A port trunk cannot consist of ports from
different VLANs.
The ports of a trunk do not have to be consecutive.
When you cable a trunk, the order of the connection
should be maintained on both nodes. The lowest
numbered port in a trunk on the switch should be
connected to the lowest numbered port of the trunk on
the other device, the next lowest numbered port on the
switch should be connected to the next lowest
numbered port on the other device, and so on.
For example, assume that you are connecting a trunk
between two AT-8000/8POE Fast Ethernet switches.
On the first switch you select ports 1 through 4 for a
trunk. On the second switch you select ports 5 through
8. To maintain the order of the port connections,
connect port 1 on the first switch to port 5 on the
second switch, port 2 to port 6, and so on.
To avoid compatibility problems, Allied Telesis
recommends creating a port trunk only between
AT-8000/8POE Fast Ethernet switches. A port trunk
between an AT-8000/8POE Fast Ethernet switch and a
device from another manufacturer might result in
undesirable trunk behavior.
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