Base Port; Load Distribution Methods; Guidelines - Allied Telesis AT-8100L/8 User Manual

Base Port

Load Distribution
Methods

Guidelines

The lowest numbered port in an aggregator is referred to as the base port.
You cannot change the base port of an aggregator. You can neither delete
it from an aggregator nor add any ports that are below it. For example, if
an aggregator consists of ports 5 to 12, you cannot delete port 5 because
it is the base port, and you are not allowed to add ports 1 to 4 to the
aggregator. If you need to change the base port of an aggregator, you
must delete and recreate the aggregator to which it belongs.
The load distribution method determines the manner in which the switch
distributes the traffic across the active ports of an aggregate trunk. The
method is assigned to an aggregator and applies to the aggregate trunk in
it. For further information, refer to "Load Distribution Methods" on
page 724.
Here are the LACP guidelines:
 LACP must be activated on both the switch and the other device.
 The other device must be 802.3ad-compliant.
 An aggregator can consist of any number of ports.
 The switch supports up to eight active ports in an aggregate trunk
at a time.

The switch can support up to a total of 32 static and LACP
aggregate trunks at a time. An LACP trunk is countered against the
maximum number of trunks only when it is active.

The ports of an aggregate trunk must be the same medium type: all
twisted pair ports or all fiber optic ports.
 The ports of a trunk can be consecutive (for example ports 5 to 9)
or nonconsecutive (for example, ports 4, 8, 11, 20).

A port can belong to only one aggregator at a time.

A port cannot be a member of an aggregator and a static trunk at
the same time.
 The ports of an aggregate trunk must be untagged members of the
same VLAN.

10/100/1000Base-TX twisted pair ports must be set to Auto-
Negotiation or 100 Mbps, full-duplex mode. LACP trunks are not
supported in half-duplex mode.
 100Base-FX fiber optic ports must be set to full-duplex mode.

Only those ports that are members of an aggregator transmit
LACPDU packets.
 The lowest numbered port in an aggregator is called the base port.
You cannot add ports that are below the base port of an
aggregator. For example, you cannot add ports 1 to 3 to an
aggregator that consists of ports 4 to 8. You must delete and
recreate an aggregator to change its base port.
AT-8100 Switch Command Line User's Guide
743