Distributed Spanning Tree Commands
OmniSwitch 6250 CLI Reference Guide November 2009 page 16-15
bridge mst region max hops
Configures the maximum number of hops that are authorized to receive Multiple Spanning Tree (MST)
regional information. Use this command to designate how many hops a BPDU is allowed to traverse
before it is discarded and related information is aged.
bridge mst region max hops max_hops
Syntax Definitions
max_hops A numeric value (1–40) that designates the maximum number of hops.
Defaults
By default, the maximum number of hops is set to 20.
Platforms Supported
OmniSwitch 6250
Usage Guidelines
• The value configured with this command is a regional value that applies to all instances and in essence
is used to determine the size of the region.
• The maximum hop count value is the initial value of the Remaining Hops parameter in the MST BPDU
that originates from the bridge that is serving as the root bridge for the region. Each bridge that in turn
receives the MST BPDU decrements the Remaining Hops count value by one and passes the new value
along to the next bridge. When the count reaches 0, the BPDU is discarded.
• Specifying an MST maximum hop count is allowed regardless of which Spanning Tree operating mode
or protocol is currently active on the switch. However, MST configuration values only apply when the
switch is operating in the flat Spanning Tree mode and using the MSTP.
Examples
-> bridge mst region max hops 40
-> bridge mst region max hops 10
Release History
Release 6.6.1; command was introduced.
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