Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 393)

Brocade 6910 Ethernet Access Switch Configuration Guide 337
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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)