inS_cnge2fe16MS_reV–
01/11/12 Page 115
INSTALLATION AND OPERATION MANUAL
CNGE2FE16MS
TECh SUPPORT: 1.888.678.9427
Spanning Tree Commands Set
Commands
Level Description
Example
spanning-tree enable
G
Enable spanning tree
switch(config)#
spanning-tree
enable
spanning-tree priority
[0~61440]
G
Configure spanning tree priority
parameters
switch(config)#
spanning-tree
priority 4096
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 admin switch.
If a switch does not receive a
bridge protocol data unit (BPDU)
message from the admin 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
[1~200000000]
I
Use the spanning-tree cost
interface configuration command
to set the path cost for Spanning
Tree Protocol (STP) calculations.
In the event of looping, the
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
