Allied Telesis AT-S62 - Manual (Page 143)

AT-S62 Management Software Menus Interface User’s Guide
Section I: Basic Operations 143
each trunk. For further information, refer to “Load Distribution Methods” on
page 144.
LACP Trunk Guidelines
Here are the guidelines to follow when creating aggregators:
ˆ LACP must be activated on both the switch and the other device.
ˆ The other device must be 802.3ad-compliant.
ˆ An aggregator can consist of any number of ports.
ˆ The AT-8500 Series switch supports up to eight active ports in an
aggregate trunk at a time.
ˆ The switch supports a maximum of three aggregate trunks.
ˆ The ports of an aggregate 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 consecutive (for example Ports 5-9) or
nonconsecutive (for example, Ports 4, 8, 11, 20).
ˆ A port can belong to only one aggregator at a time.
ˆ A port cannot be a member of an aggregator and a static trunk at the
same time.
ˆ The ports of an aggregate trunk must be untagged members of the
same VLAN. (The switch’s management software does not display an
error message if you create an aggregator with ports from different
untagged VLANs. However, the ports are not added to the aggregate
trunk when the trunk is established.)
ˆ The switch can support up to six static and LACP trunks at a time (for
example, four static trunks and two LACP trunks). An LACP trunk is
countered against the maximum number of trunks only when it is
active.
ˆ 10/100Base-TX twisted pair ports must be set to Auto-Negotiation or
100 Mbps, full-duplex mode. LACP trunking is not supported in half-
duplex mode.
ˆ 100Base-FX fiber optic ports must be set to full-duplex mode.
ˆ You can create an aggregate trunk of expansion modules or GBIC
modules with 1000Base-X fiber optic ports.
ˆ Only those ports that are members of an aggregator transmit LACPDU
packets.
ˆ The load distribution method is applied at the aggregator level. If you
want aggregate trunks to have different load distribution methods, you
must create a separate aggregator for each trunk. For further
information, refer to “Load Distribution Methods” on page 144.
ˆ A port that is a member of an aggregator functions as part of an
aggregate trunk only if it receives LACPDU packets from the remote