Mclag Topologies; Basic Mclag Building Block; Recommended Topologies - OmniSwitch os6900 Network Configuration Manual

Configuring Multi-chassis Link Aggregation

MCLAG Topologies

This section describes the building blocks that are used to construct more flexible and complex network
topologies. The recommended topologies for MCLAG that are supported are:
•
When all edge devices are attached to both MCLAG peers at the core.
•
When edge switches are connected through MCLAG and core switches are dual-attached to non
MCLAG interfaces.
For more information on MCLAG topologies, refer to the following sections.
• "Basic MCLAG Building Block" on page 10-13
• "Recommended Topologies" on page 10-13
• "Topologies Not Recommended" on page 10-15
• "Unsupported Topologies" on page 10-15

Basic MCLAG Building Block

The following diagram illustrates the basic building block that can be used to construct more flexible and
complex network topologies. The building block below can be used to connect to the edge or core devices
in the network and is comprised of two switches with a virtual fabric link (VFL) configured between them.

Recommended Topologies

The following topologies are recommended to support MCLAG:
•
MCLAG at L2 Core
•
MCLAG at Aggregation Layer
MCLAG at the L2 Core
In the topology shown below, all edge devices are attached to both MCLAG peers at the core. Spanning
Tree is not needed in this network because there are no loops. In this topology, the physical loop around
the MCLAG ports and Virtual Fabric Link is prevented by the MCLAG.
OmniSwitch AOS Release 7 Network Configuration Guide
Virtual Fabric Link
LINEAR BLOCK
MCLAG Building Block
June 2013
MCLAG Topologies
page 10-13