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Max-hops, Mst priority, Max-hops mst priority – Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) User Manual

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Brocade 6910 Ethernet Access Switch Configuration Guide

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18

Spanning Tree Commands

Default Setting
3

Command Mode
Global Configuration

Command Usage
This command limits the maximum transmission rate for BPDUs.

Example

Console(config)#spanning-tree transmission-limit 4

Console(config)#

max-hops

This command configures the maximum number of hops in the region before a BPDU is discarded.
Use the no form to restore the default.

Syntax

max-hops hop-number

hop-number - Maximum hop number for multiple spanning tree. (Range: 1-40)

Default Setting
20

Command Mode
MST Configuration

Command Usage
An MSTI region is treated as a single node by the STP and RSTP protocols. Therefore, the message
age for BPDUs inside an MSTI region is never changed. However, each spanning tree instance
within a region, and the internal spanning tree (IST) that connects these instances use a hop count
to specify the maximum number of bridges that will propagate a BPDU. Each bridge decrements
the hop count by one before passing on the BPDU. When the hop count reaches zero, the message
is dropped.

Example

Console(config-mstp)#max-hops 30

Console(config-mstp)#

mst priority

This command configures the priority of a spanning tree instance. Use the no form to restore the
default.

Syntax

mst instance-id priority priority

no mst instance-id priority

instance-id - Instance identifier of the spanning tree. (Range: 0-4094)