Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 430

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 10-Gigabit Ethernet interface, all interfaces at 40Gbps are kept up, and all 10/40 GbE interfaces that are not set to 10000 speed or auto negotiate are disabled. The system brings up 10/40 GbE 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. 10/40 Gbps Interfaces in Port Channels When both 10/40 interfaces GigE 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, the system disables them. 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) Creating a Port Channel You can create up to 128 port channels with 16 port members per group on the switch. To configure 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 use the switchport command, or configure and IP address to place the port channel in Layer 3 mode. NOTE: L3 is not supported on port extender (PE) ports or on port-channels when they have PE ports as members. Interfaces 430