at 1000 Mbps are kept up, and all 10/100/1000 interfaces that are not set to 1000 speed or autonegotiate are disabled.Dell Networking OS brings up 10/100/1000 interfaces that are set to auto negotiate so that their speed isidentical to the speed of the first channel member in the port channel.10/100/1000 Mbps Interfaces in Port ChannelsWhen both 10/100/1000 interfaces and GigE interfaces are added to a port channel, the interfaces mustshare 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 softwarechecks the first interface listed in the port channel configuration. If you enabled that interface, its speedconfiguration becomes the common speed of the port channel. If the other interfaces configured in thatport channel are configured with a different speed, Dell Networking OS disables them.For example, if four interfaces (TenGig 0/1, 0/2, 0/3 and 0/4) in which TenGig 0/1 and TenGig 0/2 are setto speed 1000 Mb/s and the others(te 0/3 and 0/4) are set to 10000 Mb/s, with all interfaces enabled, andyou add them to a port channel by entering channel-member tengigabitethernet 0/1-4 while inport channel interface mode, and Dell Networking OS determines if the first interface specified (TenGig0/1) is up. After it is up, the common speed of the port channel is 1000 Mb/s. Dell Networking OS disablesthose interfaces configured with speed 10000 Mb/s or whose speed is 10000 Mb/s as a result of auto-negotiation.In this example, you can change the common speed of the port channel by changing its configuration sothe first enabled interface referenced in the configuration is a 1000 Mb/s speed interface. You can alsochange the common speed of the port channel here by setting the speed of the Gi 0/0 interface to 1000Mb/s.Configuration Tasks for Port Channel InterfacesTo configure a port channel (LAG), use the commands similar to those found in physical interfaces. Bydefault, 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 333
