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Spanning-tree mst cost, Spanning-tree mst cost -229 – SMC Networks SMC TigerStack 1000 SMC8748M User Manual

Page 501

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S

PANNING

T

REE

C

OMMANDS

4-229

Default Setting

auto

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

• Specify a point-to-point link if the interface can only be connected to

exactly one other bridge, or a shared link if it can be connected to two

or more bridges.

• When automatic detection is selected, the switch derives the link type

from the duplex mode. A full-duplex interface is considered a

point-to-point link, while a half-duplex interface is assumed to be on

a shared link.

• RSTP only works on point-to-point links between two bridges. If you

designate a port as a shared link, RSTP is forbidden. Since MSTP is an

extension of RSTP, this same restriction applies.

Example

spanning-tree mst cost

This command configures the path cost on a spanning instance in the
Multiple Spanning Tree. Use the no form to restore the default.

Syntax

spanning-tree mst instance_id cost cost

no spanning-tree mst instance_id cost

instance_id - Instance identifier of the spanning tree.

(Range: 1-4094, no leading zeroes)

cost - Path cost for an interface. (Range: 1-200,000,000)

The recommended range is -
- Ethernet: 200,000-20,000,000
- Fast Ethernet: 20,000-2,000,000
- Gigabit Ethernet: 2,000-200,000

Console(config)#interface ethernet ethernet 1/5
Console(config-if)#spanning-tree link-type point-to-point

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