HP ProCurve 6400cl Series - Static Vlans

Switch Meshing
Operating Notes for Switch Meshing
Static VLANs
In a network having a switch mesh domain and multiple static VLANs config-
ured, all static VLANs must be configured on each meshed switch, even if no
ports on the switch are assigned to any VLAN. (The switch mesh is a member
of all static VLANs configured on the switches in the mesh.)
When static VLANs are configured, the mesh is seen as a single entity by each
VLAN. All ports in the mesh domain are members of all VLANs and can be
used to forward traffic for any VLAN. However, the non-mesh ports on edge
switches that allow traffic to move between the mesh and non-meshed devices
belong to specific VLANs and do not allow packets originating in a specific
VLAN to enter non-meshed devices that do not belong to that same VLAN. (It
is necessary to use a router to communicate between VLANs.) For example,
in the following illustration, traffic from host A entering the switch mesh can
only exit the mesh at the port for hosts B and E. Traffic from host A for any
other host (such as C or D) will be dropped because only hosts B and E are in
the same VLAN as host A.
A
B
D
E
C
Switch Mesh Domain
Red
VLAN
Red
VLAN
Red VLAN
Red VLAN Red VLAN
Blue
VLAN
Blue
VLAN
Blue VLAN
Blue VLAN Blue VLAN
(Red VLAN)
(Red VLAN)
(Red VLAN)
(Blue VLAN)
(Blue VLAN)
All ports the mesh domain are members of all VLANs. inside
Figure 7-20. VLAN Operation with a Switch Mesh Domain
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