Global Configuration Commands
5-119
Parameters
mst [<0-15> priority
<0-61440>|
cisco-interoperability
[enable|disable]|
configuration|
forward-time <4-30>|
hello-time <1-10>|
max-age <6-40>|
max-hops <7-127>]
Enables the Multiple Spanning Tree Protocol on a bridge
• <0-15> priority <0-61440> – Set the bridge priority for an
MST instance to the value specified. Use the no
parameter with this command to restore the default
bridge priority value
• priority – Sets the bridge priority for the common
instance
• <0-61440> – Defines the bridge priority in increments
of 4096 (Lower priority indicates greater likelihood of
becoming root). The default value of the priority for
each instance is 32768
• cisco-interoperability [enable|disable] – Enables/
disables interoperability with Cisco's version of MSTP
(incompatible with standard MSTP)
• enable – Enables CISCO Interoperability
• disable – Disables CISCO Interoperability
• configuration – Multiple spanning tree configuration.
This command moves to the
(config-mst) instance.
For more information, see Chapter , Spanning tree-mst
Instance
• forward-time <4-30> – Sets the time (in seconds) after
which (if this bridge is the root bridge) each port changes
states to learning and forwarding. This value is used by
all instances. The default value is 15 seconds
• hello-time <1-10> – Sets the hello-time. The hello-time
is the time (in seconds) after which (if this bridge is the
root bridge) all the bridges in a bridged LAN exchange
Bridge Protocol Data Units (BPDUs). A very low value
leads to excessive traffic on the network, while a higher
value delays the detection of a topology change. This
value is used by all instances. The default value is
2 seconds
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