Dell Force10 E300, Configuration Manual, Page: 430 / 1262

430 | Interfaces
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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 that interface is enabled, 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, FTOS disables them.
For example, if four interfaces (Gi 0/0, 0/1, 0/2, 0/3) in which Gi 0/0 and Gi 0/3 are set to speed 100 Mb/s
and the others are set to 1000 Mb/s, with all interfaces enabled, and you add them to a port channel by
entering
channel-member gigabitethernet 0/0-3
while in the port channel interface mode, and FTOS
determines if the first interface specified (Gi 0/0) is up. Once it is up, the common speed of the port
channel is 100 Mb/s. FTOS disables those interfaces configured with speed 1000 or whose speed is 1000
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 so the
first enabled interface referenced in the configuration is a 1000 Mb/s speed interface. You can also change
the common speed of the port channel here by setting the speed of the Gi 0/0 interface to 1000 Mb/s.
Configuration task list for port channel interfaces
To configure a port channel (LAG), you use the commands similar to those found in physical interfaces.
By default, no port channels are configured in the startup configuration.
• Create a port channel (mandatory)
• Add a physical interface to a port channel on page 431 (mandatory)
• Reassign an interface to a new port channel on page 433 (optional)
• Configure the minimum oper up links in a port channel (LAG) on page 434 (optional)
• Add or remove a port channel from a VLAN on page 434 (optional)
• Assign an IP address to a port channel on page 435 (optional)
• Delete or disable a port channel on page 435 (optional)
• Load balancing through port channels on page 436 (optional)
Create a port channel
You can create up to 255 port channels on an E-Series (255 for TeraScale and ExaScale, 1 to 32 for
EtherScale
)
. You can create up to 128 port channels on an C-Series, 52 port channels with 8 port members
per group on an S-Series S50 or S25, and 128 port channels with 8 port members per group on an S-Series
S55, S60 and S4810.
To configure a port channel, use these commands in the following sequence, starting in the
CONFIGURATION mode:
Step Command Syntax Command Mode Purpose
1
interface port-channel
id-number
CONFIGURATION Create a port channel.
2
no shutdown
INTERFACE
PORT-CHANNEL Ensure that the port channel is active.