DELL S50V User Manual

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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 

 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)

•

 (mandatory)

•

 (optional)

•

 (optional)

•

 (optional)

•

•

 (optional)

•

 (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: 

1

CONFIGURATION 

Create a port channel.

2

INTERFACE 
PORT-CHANNEL

Ensure that the port channel is active.