User manual

3.2.8 Spanning Tree Commands Set
Table 3.8: 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
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
[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 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 128
stp-admin-p2p
[Auto|True|False]
I
Admin P2P of STP priority on this
interface.
switch(config)#interface fastEthernet 2
switch(config-if)#stp-admin-p2p Auto
stp-admin-edge
[True|False]
I
Admin Edge of STP priority on this
interface.
switch(config)#interface fastEthernet 2
switch(config-if)#stp-admin-edge True
stp-admin-non-stp
[True|False]
I
Admin NonSTP of STP priority on
this interface.
switch(config)#interface fastEthernet 2
switch(config-if)#stp-admin-non-stp False
show spanning-tree
E
Displays a summary of the
spanning-tree states.
switch>show spanning-tree
no spanning-tree G Disable spanning-tree. switch(config)#no spanning-tree
3.2.9 QOS Commands Set
Table 3.9: QOS Commands Set
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