Guidelines – Allied Telesis AT-S106 User Manual
Page 92
Chapter 7: LACP Port Trunks
92
Guidelines
The following guidelines apply when creating aggregators:
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 AT-S106 Management software supports up to eight active ports
in an aggregate trunk at a time.
The AT-GS950/48 Gigabit Ethernet Smart Switch can support up to
ten static and LACP aggregate trunk groups at a time (for example,
four static trunks and six LACP trunks). An LACP trunk is counted
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 1-5) or
nonconsecutive (for example, ports 2, 4, 6, 8).
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.
Twisted pair ports must be set to Auto-Negotiation or 1000 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 an aggregate trunk of transceivers with 1000Base-X
fiber optic ports.
Only those ports that are members of an aggregator transmit LACPDU
packets.
A member port 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.
The port with the highest priority in an aggregate trunk carries
broadcast packets and packets with an unknown destination.
Prior to creating an aggregate trunk between an Allied Telesis device
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-GS950/48 Gigabit Ethernet Smart Switch, you should assign
the other vendor’s device a higher system LACP priority than your