DELL N3000 Manual Do Utilizador

Switch Feature Overview

For information about configuring link aggregation (port-channel) features, 

Up to eight ports can combine to form a single Link Aggregation Group 

(LAG). This enables fault tolerance protection from physical link disruption, 

higher bandwidth connections and improved bandwidth granularity.
Per IEEE 802.1AX, only links with the same operational characteristics, such 

as speed and duplex setting, may be aggregated. Dell Networking switches 

aggregate links only if they have the same operational speed and duplex 

setting, as opposed to the configured speed and duplex setting. This allows 

operators to aggregate links that use auto negotiation to set values for speed 

and duplex or to aggregate ports with SFP+ technology operating at a lower 

speed, e.g., 1G. Dissimilar ports will not become active in the LAG if their 

operational settings do not match those of the first member of the LAG.

Link Aggregate Control Protocol (LACP) uses peer exchanges across links to 

determine, on an ongoing basis, the aggregation capability of various links, 

and continuously provides the maximum level of aggregation capability 

achievable between a given pair of systems. LACP automatically determines, 

configures, binds, and monitors the binding of ports to aggregators within the 

system.

Dell Networking switches support the MLAG feature to extends the LAG 

bandwidth advantage across multiple Dell Networking switches connected to 

a LAG partner device. The LAG partner device is oblivious to the fact that it 

is connected over a LAG to two peer Dell Networking switches; instead, the 

two switches appear as a single switch to the partner. When using MLAG, all 

links can carry data traffic across a physically diverse topology and, in the case 

of a link or switch failure, traffic can continue to flow with minimal 

disruption.