Switch Meshing

Switch Meshing Fundamentals

 

Untagged VLAN 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Series

 

 

 

 

 

 

 

 

 

Series

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5300XL

 

 

 

 

 

 

 

 

 

5300XL

 

 

 

Series

 

 

 

 

 

 

 

 

 

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5300XL

 

 

 

 

 

 

 

 

 

5300XL

 

 

 

 

 

 

 

 

 

 

 

 

(Bothlinks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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5300XL

 

 

 

 

 

 

 

 

 

5300XL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Tagged VLAN 20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4000M

 

 

 

 

 

 

 

 

 

Mesh Domain “A”

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 themselves 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.

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