Allied Telesis AT 8000/8POE User Manual
Page 86
Chapter 6: Port Trunking
86
Section I: Using the Menus Interface
The ports of an trunk group must be untagged
members of the same VLAN.
An LACP trunk does not forward VLAN ID information.
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.
1000Base-X fiber optic ports must be set to full-duplex
mode.
You can create a trunk group that includes
transceivers with 1000Base-X fiber optic ports.
Only those ports that are members of a trunk group
transmit LACPDU packets.
A port that is a member of a trunk group 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.
The port with the highest priority in a trunk group
carries broadcast packets and packets with an
unknown destination. For background information,
refer to “LACP Port Priority Parameter” on page 84.
Prior to creating a trunk group between an AT-8000/
8POE Fast Ethernet switch and another vendor’s
device, refer to the vendor’s documentation to
determine the maximum number of active ports the
device can support in a trunk. If the number is less
than eight, the maximum number for the AT-8000/
8POE Fast Ethernet switch, you should probably
assign a higher system LACP priority to the other
vendor’s switch. If it is more than eight, assign the
higher priority to the AT-8000/8POE Fast Ethernet
switch. This can avoid a possible conflict between the
devices if some ports are placed in the standby mode
when the devices create the trunk. For background
information, refer to “LACP Port Priority Parameter” on
page 84.
LACPDU packets are transmitted as untagged
packets.