Concept Guide

Link Aggregation Control Protocol (LACP)
The commands for Dell Networks’s implementation of the link aggregation control protocol (LACP) for creating dynamic link aggregation
groups (LAGs) — known as port-channels in the Dell Networking OS — are provided in the following sections.
NOTE: For static LAG commands, refer to the chapter), based on the standards specied in the IEEE 802.3 Carrier sense
multiple access with collision detection (CSMA/CD) access method and physical layer specications.
Conguration Tasks for Port Channel Interfaces
To congure a port channel (LAG), use the commands similar to those found in physical interfaces. By default, no port channels are
congured in the startup conguration. In VLT mode, port channel congurations are allowed in the startup conguration.
These are the mandatory and optional conguration tasks:
• Reassigning an Interface to a New Port Channel (optional)
• Conguring VLAN Tags for Member Interfaces (optional)
• Deleting or Disabling a Port Channel (optional)
Creating a Port Channel
You can create up to 128 port channels with four port members per group on the Aggregator.
To congure a port channel, use the following commands.
1 Create a port channel.
CONFIGURATION mode
interface port-channel id-number
2 Ensure that the port channel is active.
INTERFACE PORT-CHANNEL mode
no shutdown
After you enable the port channel, you can place it in Layer 3 mode. To congure an IP address to place the port channel in Layer 3 mode,
use the switchport command.
You can congure a port channel as you would a physical interface by enabling or conguring protocols or assigning access control lists.
Adding a Physical Interface to a Port Channel
The physical interfaces in a port channel can be on any line card in the chassis, but must be the same physical type.
NOTE
: Port channels can contain a mix of Gigabit Ethernet and 10/100/1000 Ethernet interfaces, but Dell Networking OS
disables the interfaces that are not the same speed of the rst channel member in the port channel.
You can add any physical interface to a port channel if the interface conguration is minimal. You can congure only the following
commands on an interface if it is a member of a port channel:
• description
• shutdown/no shutdown
• mtu
• ip mtu (if the interface is on a Jumbo-enabled by default)
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Link Aggregation