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4-28
Multiple Instance Spanning-Tree Operation
Configuring MSTP
Syntax: spanning-tree < port-list > path-cost < auto | 1..200000000 >
Assigns an individual port cost that the switch uses to
determine which ports are forwarding ports in a given
spanning tree. In the default configuration ( auto ) the
switch determines a port’s path cost by the port’s type:
– 10 Mbps: 2000000
– 100 Mbps: 200000
– 1 Gbps: 20000
Refer to “Note on Path Cost” on page 4-17 for information
on compatibility with devices running 802.1D STP for the
path cost values
(Default: Auto).
Syntax: spanning-tree < port-list > point-to-point-mac < true | false | auto >
This parameter informs the switch of the type of device to
which a specific port connects.
true (default): Indicates a point-to-point link to a device
such as a switch, bridge, or end-node.
false: Indicates a connection to a hub (which is a shared
LAN segment).
auto: Causes the switch to set Force-False on the port if it
is not running at full duplex. (Connections to hubs are
half-duplex.)