C
HAPTER
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| Spanning Tree Commands
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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)
priority - Priority of the a spanning tree instance.
(Range: 0-61440 in steps of 4096; Options: 0, 4096, 8192, 12288,
16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056,
49152, 53248, 57344, 61440)
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