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Switch Meshing
Switch Meshing Fundamentals
Host
(Both links
use the
same
MAC
address.)
Series
5300XL
switch
Series
5300XL
switch
Series
5300XL
switch
Series
5300XL
switch
Untagged VLAN 1
Tagged VLAN 20
Mesh Domain “A”
Series
5300XL
switch
Series
5300XL
switch
Switch
4000M
In this topology, the presence of a host using the same MAC address in multiple links to different meshed
switches means that Mesh Domain “B” cannot be merged with Mesh Domain “A” to form a single mesh
domain. This is because Mesh Domain “B” includes a Switch 1600M, 2400M 2424M, 4000M, or 8000M.
Figure 14-6. Example of Topology Where Adjacent Switch Meshes Cannot Be Merged Into a Single Mesh
If you remove an older model HP Procurve switch from a mesh and leave
only Series 5300XL switches in the mesh, it can take up to two minutes
before the Series 5300XL switches begin accepting duplicate MAC
addresses on different Switches.
Automatic Broadcast Control (ABC) on HP Procurve 8000M/4000M/
2424M/2400M/1600M switches is not supported when these switches are
used in the same mesh domain with Series 5300XL switches. Thus, in a
mesh domain populated with both types of switches, ABC must be dis-
abled (the default setting) on all of the 8000M/4000M/2424M/2400M/1600M
switches in the domain.
Bringing Up a Switch Mesh Domain:
When a meshed port detects a non-meshed port on the opposite end of a point-
to-point connection, the link will be blocked. Thus, as you bring up switch
meshing on various switches, you may temporarily experience blocked ports
where meshed links should be running. These conditions should clear them-
selves after all switches in the mesh have been configured for meshing and
their switches rebooted. To reduce the effect of blocked ports during bring-
up, configure meshing and reboot the switches before installing the meshed
switches in the network.
Further Operating Information
Refer to “Operating Notes for Switch Meshing” on page 14-17.
14-9