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Multiple Instance Spanning-Tree Operation
802.1s Multiple Spanning Tree Protocol (MSTP)
Configuring MST Instance Per-Port Parameters
Command Page
spanning-tree instance < 1..16 > < port-list > path-cost
< auto | 1..200000000 >
page
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spanning-tree instance < 1..16 > < port-list > priority < priority-multiplier > page
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spanning-tree < port-list > priority < priority-multiplier > page
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Syntax: spanning-tree instance < 1..16 > [e] < port-list > path-cost < auto |
1..200000000 >
This command assigns an individual port cost for the
specified MST instance. (For a given port, the path cost setting
can be different for different MST instances to which the port
may belong.) The switch uses the path cost to determine which
ports are the forwarding ports in the instance; that is which
links to use for the active topology of the instance and which
ports to block. The settings are either auto or in a range from
1 to 200,000,000. With the auto setting, the switch calculates
the path cost from the link speed:
10 Mbps — 2000000
100 Mbps — 200000
1 Gbps — 20000
(Default: Auto)
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