Allied Telesis AT-FS970M Series - Manual (Page 122)

Chapter 10: Setting Static Port Trunks
122
Overview
Static port trunks are commonly used to improve network performance by
increasing the available bandwidth between the switch and other network
devices, as well as to enhance the reliability of the connections between
network devices.
When you create a static port trunk, you can designate how the traffic
is distributed across the physical links of the switch by defining the load
distribution method.
Static port trunks do not permit standby ports, unlike LACP trunks (which
are described in Chapter 9, “Link Aggregation Control Protocol (LACP)” on
page 111). If a link is lost on a port in a static port trunk, the trunk’s total
bandwidth is reduced. Although the traffic carried by a lost link is shifted to
one of the remaining ports in the trunk, the bandwidth remains reduced
until a lost link is reestablished or another port is manually added to the
trunk.
Here are some guidelines regarding static port trunks:
 A static trunk can have up to eight ports.
 The switch supports up to a total of 32 static port trunks and LACP
trunks at a time. An LACP trunk is counted against the maximum
number of trunks when it is active.
 The ports of a static port trunk can be all Ethernet ports or all SFP
ports. Static port trunks cannot have both types of ports.
 The ports of a trunk can be consecutive (for example ports 5-9) or
nonconsecutive (for example, ports 4, 8, 11, 20).