DELL S50V User Manual

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Link Aggregation Control Protocol

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LACP functions by constantly exchanging custom MAC PDUs across LAN Ethernet links. The protocol 
packets are only exchanged between ports that are configured as LACP capable.

•

On ExaScale, LACP is supported on 200 physical ports. Use static LAGs for the remaining ports to 
avoid unpredictable results.

•

LACP enables you to add members to a port channel (LAG) as long as it has no static members. 
Conversely, if the LAG already contains a statically defined member (

 command), 

the

command is not permitted.

•

A static LAG cannot be created if a dynamic LAG using the selected number already exists.

•

No dual membership in static and dynamic LAGs: 

•

If a physical interface is a part of a static LAG, then the command 

 will 

be rejected on that interface.

•

If a physical interface is a part of a dynamic LAG, it cannot be added as a member of a static LAG. 
The command 

 will be rejected in the static LAG interface 

for that physical interface.

•

A dynamic LAG can be created with any type of configuration.

•

There is a difference between the 

 and 

:

— The 

 command on LAG “xyz” disables the LAG and retains the user 

commands. However, the system does not allow the channel number “xyz” to be statically 
created.

— The command 

 deletes the specified LAG, 

including a dynamically created LAG. This command causes all LACP-specific 
commands on the member interfaces to be removed. The interfaces are restored to a state 
that is ready to be configured.

There will be no configuration on the interface since that condition is required for an 

interface to be part of a LAG

.

•

 for more information.

•

LACP cannot add an interface to a LAG if one of the LAG members is shut down on the remote 
interface. If a remote LAG member is shut down, 

attempt to add a member. In this case, enable all members of the LAG on the remote system, and then 
add any new members on the local system.

•

FTOS might not synch connected and static routes learned via LACP to the secondary RPM. 
Configure 

 to synch LACP states between RPMs.

Message 1  LACP Remote Port Down Error Message

% Error: This port property does not match with other LAG member.