4-6
Switch Meshing
Switch Meshing Fundamentals
■ If GVRP is enabled, meshed ports in a switch become members of any 
dynamic VLANs created in the switch in the same way that they would if 
meshing was not configured in the switch. (For more on GVRP, refer to 
chapter 2, “GVRP”.)
Note • A switch mesh domain (figure 4-1 on page 4-1) cannot include either 
a switch that is not configured for meshing, or a hub.
• Where a given pair of switches are linked with meshed ports, you must 
not also link the pair together through non-meshed ports unless you 
have also enabled STP, RSTP, or MSTP to prevent a loop from forming.
Figure 4-4.  Example of an Unsupported Topology
• The switch blocks traffic on a meshed port connected to a non-
meshed port on another switch.
• Switch meshing does not allow trunked links (LACP or Trunk) 
between meshed ports. 
Linking a non-mesh device or  port into the mesh causes the meshed switch 
port(s) connected to that device to shut down.
Using a Heterogeneous Switch Mesh
You can use the switches covered in this guide with the HP Series 5300xl 
switches in normal mode. 
 
   Switch 3
Switch 1
Switch 2
Switch Mesh 
Domain
This topology forms a 
broadcast loop unless 
you configure MSTP 
on the network.