System information
INS_CNGE3FE7MS4_REV– Rev. 4.30.14 PAGE 89
INSTALLATION AND OPERATION MANUAL CNGE3FE7MS4
TECH SUPPORT: 1.888.678.9427
Commands Set List—Spanning Tree command set
Commands Level Description Example
spanning-tree enable G Enable spanning tree switch(config)#spanning-tree enable
spanning-tree priority
[0to61440]
G Configure spanning tree priority
parameter
switch(config)#spanning-tree priority
32767
spanning-tree max-age
[seconds]
G Use the spanning-tree max-age
global configuration command
to change the interval between
messages the spanning tree
receives from the root switch.
If a switch does not receive a
bridge protocol data unit (BPDU)
message from the root switch
within this interval, it recomputed
the Spanning Tree Protocol (STP)
topology.
switch(config)# spanning-tree max-age
15
spanning-tree hello-
time [seconds]
G Use the spanning-tree hello-time
global configuration command
to specify the interval between
hello bridge protocol data units
(BPDUs).
switch(config)#spanning-tree hello-
time 3
spanning-tree forward-
time [seconds]
G Use the spanning-tree forward-
time global configuration
command to set the forwarding-
time for the specified spanning-
tree instances. The forwarding
time determines how long each of
the listening and
learning states last before the port
begins forwarding.
switch(config)# spanning-tree forward-
time 20
stp-path-cost
[1to200000000]
I Use the spanning-tree cost
interface configuration command
to set the path cost for Spanning
Tree
Protocol (STP) calculations. In the
event of a loop, spanning tree
considers the path cost when
selecting an interface to place into
the forwarding state.
switch(config)#interface fastEthernet 2
switch(config-if)#stp-path-cost 20
stp-path-priority
[Port Priority]
I Use the spanning-tree port-
priority interface configuration
command to configure a port
priority that is used when two
switches tie for position as the
root switch.
switch(config)#interface fastEthernet 2
switch(config-if)# stp-path-priority 127