Planet IGSW-2840 User Manual page 542

revision
This command configures the revision number for this multiple spanning tree configuration of this switch. Use the no form to
restore the default.
Syntax
revision number number -Revision number of the spanning tree. (Range: 0-65535)
Default Setting
0
Command Mode
MST Configuration
Command Usage
The MST region name (page 4-209) and revision number are used to designate a unique MST region. A bridge (i.e.,
spanning-tree compliant device such as this switch) can only belong to one MST region. And all bridges in the same
region must be configured with the same MST instances.
Example
Console(config-mstp)#revision 1
Console(config-mstp)#
Related Commands
name
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.
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User's Manual of IGSW-2840