Users Guide

Interfaces in Port Channels
When interfaces are added to a port channel, the interfaces must share a common speed. When interfaces have a congured speed
dierent from the port channel speed, the software disables those interfaces.
The common speed is determined when the port channel is rst enabled. Then, the software checks the rst interface listed in the port
channel conguration. If you enabled that interface, its speed conguration becomes the common speed of the port channel. If the other
interfaces congured in that port channel are congured with a dierent speed, Dell EMC Networking OS disables them.
Port channels can contain a mix of 1G/10G/25G/40G/50G/100G. The interface speed that the port channel uses is determined by the
rst port channel member that is physically up. Dell EMC Networking OS disables the interfaces that do not match the interface speed that
the rst channel member sets. That rst interface may be either the interface that is physically brought up rst or was physically operating
when interfaces were added to the port channel. For example, if the rst operational interface in the port channel is a Tengigabit Ethernet
interface, all interfaces at 10000 Mbps are kept up, and all other interfaces that are not set to 10G speed or auto negotiate are disabled.
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.
These are the mandatory and optional conguration tasks:
• Creating a Port Channel (mandatory)
• Adding a Physical Interface to a Port Channel (mandatory)
• Reassigning an Interface to a New Port Channel (optional)
• Conguring the Minimum Oper Up Links in a Port Channel (optional)
• Adding or Removing a Port Channel from a VLAN (optional)
• Assigning an IP Address to a Port Channel (optional)
• Deleting or Disabling a Port Channel (optional)
• Load Balancing Through Port Channels (optional)
Creating a Port Channel
You can create up to 4096 port channels with up to 16 port members per group on the platform.
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 2 or Layer 3 mode. To place the port channel in Layer 2 mode or 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.
Interfaces
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