Allied Telesis AT-S63 - Manual (Page 133)

AT-S63 Management Software Menus Interface User’s Guide
Section I: Basic Features 133
LACP Trunk Guidelines
Following are the guidelines for 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-9400 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: 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 return an
error message if you create an aggregator with ports that are members
of different untagged VLANs. However, it does not add the ports to the
aggregate trunk when establishing the trunk.)
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 including transceivers 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 134.
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
device. If it does not receive LACPDU packets, it functions as a regular
Ethernet port, forwarding network traffic while also continuing to
transmit LACPDU packets.
ˆ The port with the highest priority in an aggregate trunk carries
broadcast packets and packets with an unknown destination.
ˆ Prior to creating an aggregate trunk between an AT-9400 Series switch
and another vendor’s device, refer to the vendor’s documentation to