4-5
Switch Meshing
Switch Meshing Fundamentals
■ If a switch in the mesh has GVRP enabled, then all switches in the mesh
must have GVRP enabled. Otherwise, traffic on a dynamic VLAN may not
pass through the mesh.
■ If a switch in the mesh has a particular static vlan configured, then all
switches in the mesh must have that static vlan configured.
■ If a switch in the mesh has IGMP enabled, then all switches in the mesh
must have IGMP enabled.
■ If a switch in the mesh has LLDP enabled, then all switches in the mesh
must have LLDP enabled.
■ Dynamic IP Lockdown and Virus Throttling should not be activated on
mesh ports. These are security features for edge ports and mesh ports are
not edge ports.
■ DHCP Snooping and ARP protection are enabled through VLANs. Mesh
ports belong to all VLANs, so if these security features are enabled on a
switch that has mesh ports, the mesh ports must be configured as “trusted”
ports because meshing may move the port of a MAC address in the mesh
based on the least cost path.
■ After adding or removing a port from the mesh, you must save the current
configuration and reboot the switch in order for the change to take effect.
■ Multiple meshed domains require separation by either a non-meshed
switch or a non-meshed link. For example:
Figure 4-3. Example of Multiple Meshed Domains Separated by a Non-Mesh Switch or a Non-Mesh Link
Switch
Non-Mesh
Mesh Domain
Mesh Domain
Mesh Domain
Mesh Domain
Non-Mesh Ports
Non-Mesh Ports
Non-Mesh Link
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