Fabric Attach Automatic LAG Creation
ExtremeXOS 31.1 introduces automatic LAG creation for Fabric Attach.
The Fabric Attach feature allows attachment of non-SPB (Shortest Path Bridging) stations
to an SPB network through a Fabric Attach server, or it can act as a Fabric Attach
server for VXLAN (Virtual Extensible LAN) overlay networks.
When an switch receives Fabric Attach element TLVs on two or more ports that have same
System-Id, same SMLT-Id, and have a Connection Type of SMLT, it automatically creates a
LAG consisting of those ports. These LAGs:
- Do not persist after a reboot—after a reboot, TLVs must be received again to
re-form the LAG.
- Do not require receipt of LACP PDUs—LACP PDUs are not sent.
- Require at least two ports to form the LAG—if a port is removed from the LAG,
and the exiting LAG goes down to one port, it is torn down. When a LAG is
initially created with two ports, the lowest numbered port is chosen as the
master port of the LAG. If there are three or more ports on the LAG, and the
port is not the master port, it is simply removed from the LAG. If it is the
master port, the lag is torn down, and then re-created with the lowest port
number of the remaining ports as the master port.
- Are supported in stacks—the dynamic LAG is checkpointed to support failover,
etc.
Supported Platforms
ExtremeSwitching X435, X450-G2, X460-G2, X670-G2, X440-G2, X465, X590, X620, X690,
X695, X870, and 5520 series switches.
