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SmartConnect User’s Guide
BMD00082, February 2009 Chapter 3: Switch Virtualization
27
VSGs containing VMs have the following characteristics:
The VSG may consist of VMs and (optionally) external ports.
Internal ports cannot be added to VSGs which contain VMs, and VMs cannot be added to
VSGs which contain internal ports.
The switch allows communication between VMs in the same group.
The switch does not allow communication between VMs which are not in the same group.
However, VMs which are in the same hypervisor may still communicate with each other
even if they are not assigned to the same VSG on the switch.
For information on configuration, see “Assigning Virtual Machines to VSGs” on page 97.
Link Aggregation
The default network configuration of the VSE SmartConnect software places all ports into a
single VSG, and aggregates all external ports together into a static Link Aggregation Group
(LAG), also known as a trunk (see “Trunking” on page 30).
This configuration eliminates the need for Spanning Tree Protocol to prevent network loops,
since the uplink ports act as a single link. Also, since all of the uplink ports in each VSG partic-
ipate in a static LAG, if a link fails, the existing traffic is redirected to the other links.
To override default VSG assignments and trunk settings, see “Assigning Ports to VSGs” on
page 97).