Allied Telesis SwitchBlade x3100 Series User Manual

Configuring LAG Introduction
4-25
Software Reference for SwitchBlade x3100 Series Switches (Layer Two Switching)
the ports on each side of the links in the group. This is not supported in the current release, so the
LAG feature operates in static mode only. For a list of the MIB variables that are supported, refer to
the Specification section.
• All interfaces in a LAG group must share the same provisioning attributes:
• Same speed setting
• Same auto-negotiate setting (i.e., AUTONEGOTIATE=ON)
• Same duplex setting (i.e., FULL)
The “LAG speed” is determined by the speed of the first port added to the LAG. If the user tries to add a
second interface with a different speed, there will be a “port speed does not match LAG speed” error mes-
sage.
• The LAG group has an Operational State. An Operational State of UP means the LAG group has been pro-
visioned and one or more ports are in an Operational State of UP.
• LAG and (R)STP are compatible; a LAG can be created (or interfaces added to a LAG) regardless of the STP
state. Also, STP can be disabled/enabled on an interface regardless of whether the interface is in a LAG or
not.
Note: A LAG group does not have an Administrative state; its Operational state is determined by the
Operational State of its associated interfaces. However, the MODE parameter does determine the
traffic carrying capability of the LAG group, since the MODE must be ON before the LAG group can
carry traffic.
Caution: A LAG group can be pre-provisioned with the MODE set to OFF, and then set to ON to apply the
LAG group to the hardware. However, if the ports have been physically provisioned, the mode can be
OFF -- causing loops
• Note that, to change any of the interface settings, the interface must first be disabled. This will remove the
interface from the LAG “Enabled Ports” list. The interface will still however be provisioned against the LAG.
4.3.2.3 Restrictions and Limitations
•
Ports cannot have egress rate limiting configured.
• Ports cannot have a traffic descriptor configured.
• Once an interface belongs to a LAG group, changing individual interface attributes is not allowed using the
LAG interface.
• All ports must have the same Classifier configuration.
• The port direction must match that of the lag, as determined by the first port added to the LAG.

Allied Telesis SwitchBlade x3100 Series Specifications

General

Brand	Allied Telesis
Model	SwitchBlade x3100 Series
Category	Switch
Language	English