How Do Lags Interact With Other Features - Dell PowerEdge M420 Configuration Manual

Dell powerconnect m8024-k user's configuration guide

Hide thumbs Also See for PowerEdge M420:

Table of Contents

How Do LAGs Interact with Other Features?

From a system perspective, a LAG is treated just as a physical port, with the

same configuration parameters for administrative enable/disable, spanning

tree port priority, path cost as may be for any other physical port.

When members are added to a LAG, they are removed from all existing

VLAN membership. When members are removed from a LAG they are added

back to the VLANs that they were previously members of as per the

configuration file. Note that a port's VLAN membership can still be

configured when it's a member of a LAG. However this configuration is only

actually applied when the port leaves the LAG.

The LAG interface can be a member of a VLAN complying with IEEE

Spanning tree does not maintain state for members of a LAG, but the

Spanning Tree does maintain state for the LAG interface. As far as STP is

concerned, members of a LAG do not exist. (Internally, the STP state of the

LAG interface is replicated for the member links.)

When members are deleted from a LAG they become normal links, and

spanning tree maintains their state information.

Statistics are maintained for all LAG interfaces as they are done for the

physical ports, besides statistics maintained for individual members as per the

802.3ad MIB statistics.

Configuring Link Aggregation