Allied Telesis AT-S63 - Manual (Page 164)

Chapter 10: Static Port Trunking Commands
164 Section I: Basic Operations
Overview
A static port trunk is a group of two to eight ports that function as a single
virtual link between the stack and another network device. A static port
trunk distributes the traffic across its ports to improve performance and
enhance reliability by reducing the reliance on a single physical link.
A static port trunk is easy to configure. You simply designate the ports of
the trunk and the management software automatically groups them
together. You can also control how traffic is distributed over the trunk ports
by specifying the load distribution method. For an explanation of the load
distribution methods, refer to the AT-S63 Management Software Features
Guide.
Here are the guidelines to creating static port trunks on a stack:
ˆ Since static port trunks are often implemented differently by network
equipment vendors, Allied Telesis recommends using this feature only
between Allied Telesis networking devices to ensure compatibility.
ˆ A static trunk can contain up to eight ports.
ˆ A stack can support up to six static port trunks.
ˆ The ports of a static trunk must be of the same medium type. They can
be all twisted pair ports or all fiber optic ports.
ˆ The ports of a trunk can be either consecutive (for example, 1.5 to 1.8)
or nonconsecutive (for example, 2.4, 2.8, 3.11, 4.20).
ˆ The ports of a trunk can be located on different switches in a stack.
ˆ Before creating a port trunk, examine the speed, duplex mode, flow
control, and back pressure settings of the lowest number port to be in
the trunk. Verify that its settings are correct for the device to which the
trunk will be connected. When you create a static port trunk, the
management software copies the current settings of the lowest
numbered port in the trunk to the other ports, because all ports in a
static trunk must have the same settings. For example, if you create a
port trunk consisting of ports 2.5 to 2.8, the parameter settings for port
2.55 are copied to ports 2.6, 2.7, and 2.8 so that all the ports of the
trunk have the same settings.
ˆ After creating a port trunk, do not change the speed, duplex mode,
flow control, or back pressure of any port in the trunk without also
changing the other ports.
ˆ A port can belong to only one static trunk at a time.
ˆ A port cannot be a member of a static trunk and an LACP trunk at the
same time.
ˆ The ports of a static trunk must be untagged members of the same
VLAN. The ports cannot be untagged members of different VLANs.