HP 4000M User Manual Page 166

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6-90
Configuring the Switch
Load Balancing: Switch Meshing
Configuring the Switch
Figure 6-60. Connecting a Switch Mesh Domain to Non-Meshed Devices
STP should be configured on non-mesh devices that use redundant links to
interconnect with other devices or with multiple switch mesh domains. For
example:
Figure 6-61. Interconnecting Switch Mesh Domains with Redundant Links
In the above case of multiple switch meshes linked with redundant trunks
there is the possibility that STP will temporarily block a mesh link. This is
because it is possible for STP to interpret the cost on an external trunked link
to be less than the cost on a meshed link. However, if this condition occurs,
the meshed switch that has a blocked link will automatically increase the STP
cost on the external (non-meshed) link to the point where STP will block the
external link and unblock the meshed link. This process typically resolves
itself in approximately 30 seconds.
Mesh Domain
STP
Block
STP
Block
Mesh Domain
Non-Mesh Switch
Non-Mesh Switch
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