Reference Guide

Each port channel must contain interfaces of the same interface type/speed.
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 first port channel member that is physically up. Dell Networking OS
disables the interfaces that do not match the interface speed that the first channel member sets. That first
interface may be either the interface that is physically brought up first or was physically operating when
interfaces were added to the port channel. For example, if the first 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.
Interfaces in Port Channels
When interfaces are added to a port channel, the interfaces must share a common speed. When
interfaces have a configured speed different from the port channel speed, the software disables those
interfaces.
The common speed is determined when the port channel is first enabled. At that time, the software
checks the first interface listed in the port channel configuration. If you enabled that interface, its speed
configuration becomes the common speed of the port channel. If the other interfaces configured in that
port channel are configured with a different speed, Dell Networking OS disables them.
Port channels can contain a mix of 1G/10G/25G/40G/50G/100G interfaces. The interface speed the port
channel uses is determined by the first port channel member that is physically up. Dell Networking OS
disables the interfaces that do not match the interface speed that the first channel member sets. That first
interface may be the first interface that is physically brought up or was physically operating when
interfaces were added to the port channel. For example, if the first operational interface in the port
channel is a Gigabit Ethernet interface, all interfaces at 1000 Mbps are kept up, and all other interfaces
that are not set to 1000 speed or auto negotiate are disabled.
Dell Networking OS brings up the interfaces that are set to auto negotiate so that their speed is identical
to the speed of the first channel member in the port channel.
Configuration Tasks for Port Channel Interfaces
To configure a port channel (LAG), use the commands similar to those found in physical interfaces. By
default, no port channels are configured in the startup configuration.
These are the mandatory and optional configuration tasks:
• Creating a Port Channel (mandatory)
• Adding a Physical Interface to a Port Channel (mandatory)
• Reassigning an Interface to a New Port Channel (optional)
• Configuring 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)
Interfaces
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