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Switch Meshing
Switch Meshing Fundamentals
Host
(Both links
use the
same
MAC
address.)
Series
5300XL
switch
Series
5300XL
switch
Switch
4000M
Series
5300XL
switch
LAN
Untagged VLAN 1
Tagged VLAN 20
Scenario 1: In a heteroge-
neous mesh, creating the
mesh with only one Series
5300XL switch connected to
the host (on VLAN 1, for
example), and then
connecting a second Series
5300XL switch to the host
(regardless of the VLAN
used) results in connectivity
issues with the host.
Scenario 2: Adding the
Switch 4000M after bringing
up the mesh with two Series
5300XL switches already
connected to the host as
shown here (with or without
separate VLANs) blocks the
Switch 4000M from the mesh.
The Switch 4000M is not
supported in topologies
allowing the same MAC
address on multiple
switches.
Mesh Domain
Figure 14-4. Example of an Unsupported Heterogeneous Topology Where Duplicate MAC Addresses Come
Through Different Switches (Regardless of the VLANs Used)
Host
(Both links
use the
same MAC
address.)
Series
5300XL
switch
Series
5300XL
switch
Switch
4000M
Series
5300XL
switch
LAN
Tagged VLAN 20
Creating the mesh with only
one Series 5300XL switch
connected to the host, and
and using tagged VLANs for
multiple connections
between the host and the
meshed switch allows
normal meshing operation.
The Switch 4000M is not
supported in topologies
allowing the same MAC
address on multiple
switches.
Mesh Domain
Untagged VLAN 1
Figure 14-5. Example of a Supported Heterogeneous Topology Where Duplicate MAC Addresses Come
Through Different VLANs on the Same Switch
Note that in figures 14-4 and 14-5, if all switches are Series 5300XL
switches, then you can use either topology.
Also, if you have two separate switch meshes with the topology shown in
figure 14-6, you cannot join them into a single mesh.
14-8