》打开或关闭STP
Catalyst 3548(Csico IOS系统)
命令格式：spanning-treevlan <vlan> //启用STP
nospanning-tree vlan <vlan> //关闭STP
Switch-PHY-3548(config)#spanning-tree vlan 3
Switch-PHY-3548(config)#no spanning-tree vlan 3
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：set spantree enable //启用STP
set spantree disable //关闭STP
Switch-PHY-6500>(enable)set spantree enable 3
VLAN 3 bridgespanning tree enabled
Switch-PHY-6500>(enable)
Switch-PHY-6500>(enable)set spantree disable 3
VLAN 3 bridgespanning tree disable
Switch-PHY-6500>(enable)
》配置根网桥和备份根网桥
Catalyst 3548(Csico IOS系统)
命令格式：spanning-treevlan <vlans> root primary //设置主ROOT（primaryroot）
Switch-PHY-3548(config)#spanning-tree vlan 3 root primary
Switch-PHY-3548(config)#
命令格式：spanning-treevlan <vlans> root secondary //设置备份ROOT（second root）
Switch-PHY-3548(config)#spanning-tree vlan 3 root secondary
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree root <vlans> //设置主ROOT
Switch-PHY-6500>(enable)set spantree root 1,200-204
VLANS1,200-204 bridge priority set to 8189.
VLANS1,200-204 bridge max aging time set to 20.
VLANS1,200-204 bridge hello time set to 2.
VLANS1,200-204 bridge forward delay set to 15.
Switch isnow the root switch for active VLANS 1,200-204.
Switch-PHY-6500>(enable)
命令格式：setspantree root secondary <vlans> //设置备份ROOT
Switch-PHY-6500>(enable)set spantree root secondary 1,200-204
VLANS1,200-204 bridge priority set to 8189.
VLANS1,200-204 bridge max aging time set to 20.
VLANS1,200-204 bridge hello time set to 2.
VLANS 1,200-204 bridge forward delay set to15.
Switch isnow the root switch for active VLANS 1,200-204.
Switch-PHY-6500>(enable)
》配置生成树优先级（取值范围是0-61440，增量是4096）
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：spanning-treevlan <vlans> priority <0-61440>
Switch-PHY-3548(config)#spanning-treevlan 3 priority 8192
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree priority <priority>
Switch-PHY-6500>(enable)set spantree priority 8192
spantree bridgepriority set to 8192.
Switch-PHY-6500>(enable)
》配置BackboneFast生成树可选功能
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：spanning-treebackbonefast //允许backbonefast功能
Switch-PHY-3548(config)#spanning-tree backbonefast
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree backbonefast enable //允许backbonefast功能
命令格式：setspantree backbonefast disable //不允许backbonefast功能
Switch-PHY-6500>(enable)set spantree backbonefast enable
Switch-PHY-6500>(enable)
》配置UplinkFast生成树可选功能
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：spanning-treeuplinkfast <cr>
spanning-tree uplinkfast max-update-rate <0-32000> <cr>
//注：max-update-rate的值是0-32000，单位是packet/s（每秒更新的包数）
Switch-PHY-3548(config)#spanning-tree uplinkfast 32000
Switch-PHY-3548(config)#spanning-tree uplinkfast
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree uplinkfast enable <cr>
setspantree uplinkfast enable rate <station_update_rate> <cr>
//注：<station_update_rate>的缺省值是15packets/100ms,单位是packet/ms.
Switch-PHY-6500>(enable)set spantree uplinkfastenable
VLANs 1-1005bridge priorityset to 49152.
The port costand portvlancost of all ports set to above 3000.
Station update rate set to 15 packets/100ms,
Uplinkfast all-portocols field set to off.
Uplinkfastenable for bridge.
Switch-PHY-6500>(enable)
Switch-PHY-6500>(enable)set spantreeuplinkfast enable rate 40
VLANs 1-4096bridge priorityset to 49152.
The port costand portvlancost of all ports set to above 3000.
Station update rate set to 40 packets/100ms,
Uplinkfast all-portocols field set to off.
Uplinkfastenable for bridge.
Switch-PHY-6500>(enable)
》配置PortFast生成树可选功能
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：spanning-treeportfast default
Switch-PHY-3548(config)#spanning-tree portfast default
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree portfast <mod/port> enable //打开portfast
setspantree portfast <mod/port> disable //关闭portfast
setspantree portfast <mod/port> default //缺省启用portfast
Switch-PHY-6500>(enable)set spantree portfast3/2 enable
Warning:Connecting Layer 2 devices to a fast start port can cause
temporaryspanning tree loops.Use with caution.
Spantree ports3/2fast start enabled
Switch-PHY-6500>(enable)set spantree portfast 4/1-24 enable
Warning:Connecting Layer 2 devices to a fast start port can cause
temporaryspanning tree loops.Use with caution.
Spantree ports3/2fast start enabled
Switch-PHY-6500>(enable)
》配置BPDUFilter生成树可选功能
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：spanning-treeportfast bpdufilter default <cr>
Switch-PHY-3548(config)#spanning-tree portfast bpdufilter default
Switch-PHY-3548(config)#
Catalyst 6500(Catalyst OS(CatOS)系统)
命令格式：setspantree portfast bpdu-filter enable<cr> //所有端口启用bpdu-filter
setspantree portfast bpdu-filter disable<cr> //关闭bpdu-filter
setspantree portfast bpdu-filter <mod/port> enable <cr> //打开bpdu-filter
setspantree portfast bpdu-filter <mod/port> disable <cr> // 关闭bpdu-filter
setspantree portfast bpdu-filter <mod/port>default <cr> //设置为缺省
Switch-PHY-6500>(enable)set spantree portfastbpdu-filter enable
Switch-PHY-6500>(enable)set spantree portfast bpdu-filter 3/1-24 enable
Warning:Portsenabled with bpdu filter will not send BPDUs and drop all received
BPDUs.You may cause loops in the bridge network if youmisuse this feature.
Switch-PHY-6500>(enable)