LAG configuration

View link aggregation (LAG) configurations. Link aggregation is a method of grouping multiple Ethernet ports into a virtual link with aggregated bandwidth. The system treats the set of ports in a LAG as a single port. All the ports within the LAG use the same Layer 2 MAC address and same default VLAN. You can specify which port within the LAG to use as the flood port for address discovery.

Within the system's interface and/or port hierarchy (the "stack"), a LAG can connect to the following upper layers:

A single virtual router interface

Multiple VLANs

A LAG can connect to the following lower layers:

Multiple Ethernet ports

LAGs support the following:

Mixed media (that is, both Gigabit Ethernet and 10/100 Mbps Ethernet ports within the same LAG)

A maximum of 22 LAGs per switch

A maximum of 16 Ethernet ports per LAG

Access mode

exec

Syntax

show lag

Output Description

Heading	Description	Filter
Lag Name	Specifies the name of the LAG.	lagName text
Admin State	The administrative (manually configured) status of the interface. Valid values: `enabled`, `disabled`	adminState enumeration
Oper Status	The operational state of the interface. Valid values: `up` : The interface is operational. `down` : The interface is not operational. `testing` : Interface attempting to come up; verifying configuration. `unknown` : The interface is not in any of the listed states. `dormant` : Interface is uninitialized; configuration database/hardware not synchronized.	status enumeration
Port MAC	The MAC address the port is using, either the MAC address of the first port added to the LAG or the administratively assigned address.	portMac macAddress
Jumbo Frames	Configures the port to accept or reject jumbo frames. (Jumbo frames extend the traditional 1500 byte Ethernet frame size to 9018 bytes for 100M and Gigabit Ethernet.) Valid values: `enabled`, `disabled`	jumboFrames enumeration
Default VLAN	Sets the default VLAN. Any packet arriving on the port that does not have a VLAN ID in its extended MAC header is assigned to this vlan. This can be set to either the name of a VLAN or 'discard' to drop untagged packets. If the LAG is in a VLAN, untagged frames arriving on this port will be discarded. If you do not want the traffic to be dropped, assign a different VLAN.	defVlan text
Flood Port	The interface the LAG is using to broadcast address inquiries (the operational flood port). This port is assigned by the system based on the values you configure with the interface command.	floodPort IfName

Heading

Description

Filter

Lag Name

Specifies the name of the LAG.

lagName text

Admin State

The administrative (manually configured) status of the interface.

Valid values: enabled, disabled

adminState enumeration

Oper Status

The operational state of the interface.

Valid values:

up : The interface is operational.
down : The interface is not operational.
testing : Interface attempting to come up; verifying configuration.
unknown : The interface is not in any of the listed states.
dormant : Interface is uninitialized; configuration database/hardware not synchronized.

status enumeration

Port MAC

The MAC address the port is using, either the MAC address of the first port added to the LAG or the administratively assigned address.

portMac macAddress

Jumbo Frames

Configures the port to accept or reject jumbo frames. (Jumbo frames extend the traditional 1500 byte Ethernet frame size to 9018 bytes for 100M and Gigabit Ethernet.)

Valid values: enabled, disabled

jumboFrames enumeration

Default VLAN

Sets the default VLAN. Any packet arriving on the port that does not have a VLAN ID in its extended MAC header is assigned to this vlan. This can be set to either the name of a VLAN or 'discard' to drop untagged packets. If the LAG is in a VLAN, untagged frames arriving on this port will be discarded. If you do not want the traffic to be dropped, assign a different VLAN.

defVlan text

Flood Port

The interface the LAG is using to broadcast address inquiries (the operational flood port). This port is assigned by the system based on the values you configure with the interface command.

floodPort IfName

Related actions

You can do the following