Figure 11. Stp Cost Modification - Enterasys SSIM-H2-02 Installation And User Manual

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Figure 11. STP Cost Modification

In Figure 11, TR Switch 2 and Ethernet Switch 2 know that the cost of the
Secondary link is 20,000 higher than the cost of the primary link seen by TR Switch
1 and Ethernet Switch 1. This means that the secondary link will be blocked on one
of its ends.
To manually configure spanning-tree costs for a backup connection to the Ethernet,
set each connection attribute to Primary and then change the spanning-tree costs
must be changed on each side of the backup link.
SSIM-H2-02 Fast Ethernet - Translational Switch SmartStack Interface Module Installation and User Guide Configuration