多生成树协议MSTP的配置.docx
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多生成树协议MSTP的配置.docx
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多生成树协议MSTP的配置
实验六:
多生成树协议MSTP的配置
实验目的了解并掌握多生成树协议的配置
背景描述
某企业网络管理员认识到,传统的生成树协议(STP)是基于整个交换网络产生一个树形拓扑结构,所有的VLANs都共享一个生成树,这种结构不能进行网络流量的负载均衡,使得有些交换设备比较繁忙,而另一些交换设备又很空闲,为了克服这个问题,他决定采用基于VLAN的多生成树协议MSTP,现要在交换机上做适当配置来完成这一任务。
实验拓扑
完整实验拓扑图
实验步骤
1.交换机Switch1的一些相应配置
(1)创建Vlan10和Vlan20
Switch1(config)#vlan10
Switch1(config-vlan)#exit
Switch1(config)#vlan20
Switch1(config-vlan)#exit
(2)设置Trunk口和端口fa0/1与fa0/2的聚合
Switch1(config)#interrangefa0/1-2
Switch1(config-if-range)#switchportmodetrunk
Switch1(config-if-range)#exit
Switch1(config)#interrangefa0/1-2
Switch1(config-if-range)#port-group1
Switch1(config-if-range)#exit!
设置端口fa0/1-2为trunk并端口聚合Switch1(config)#interrangefa0/3-4
Switch1(config-if-range)#switchportmodetrunk
Switch1(config-if-range)#exit
(3)开启生成树协议设为MSTP模式,并作相应设置
Switch1(config)#spanning-tree!
开启生成树
Switch1(config)#spanning-treemodemstp!
配置生成树模式为MSTP
Switch1(config)#spanning-treemstconfiguration!
进入MSTP配置模式
Switch1(config-mst)#nametaishan!
配置域名称
Switch1(config-mst)#revision1!
配置版本(修订号)
Switch1(config-mst)#instance1vlan10!
配置instance1(实例1)并关联Vlan10
Switch1(config-mst)#instance2vlan20!
配置instance2(实例2)并关联Vlan20
Switch1(config-mst)#exit
Switch1(config)#spanning-treemst1priority8192
!
提升交换机Switch1在实例1上的优先级,缺省是32768,值越小越优先成为该instance中的rootswitch,这一配置能确定Switch1为instance的根桥
Switch1(config)#end
【注意事项】
l对规模很大的交换网络可以划分多个域(region),在每个域里可以创建多个
instance(实例);
2划分在同一个域里的各台交换机须配置相同的域名(name)、相同的修订号(revisionnumber)、相同的instance—vlan对应表;
3交换机可以支持65个MSTPinstance,其中实例0是缺省实例,是强制存在的,其它实例可以创建和删除;
4将整个spanning-tree恢复为缺省状态用命令spanning-treereset。
5注意各个交换机的查看(验证)配置信息应该在所有的交换机配置完成后进行。
验证配置:
(1)显示MSTP全局配置
Switch1#showspanning-treemstconfigurationMultispanningtreeprotocol:
Enabled
!
显示MSTP全局配置
NameRevision:
Instance
:
taishan
1
VlansMapped
0
1-9,11-19,21-4094
1
10
2
20
2)查看生成树信息
Switch1#showspanning-tree!
查看生成树信息
StpVersion:
MSTP
SysStpStatus:
Enabled
BaseNumPorts:
24
MaxAge:
20
HelloTime:
2ForwardDelay:
15BridgeMaxAge:
20BridgeHelloTime:
2BridgeForwardDelay:
15
MaxHops:
20
TxHoldCount:
3PathCostMethod:
LongBPDUGuard:
DisabledBPDUFilter:
Disabled
######MST1vlansmapped:
10!
instance1的配置信息
BridgeAddr:
00d0.f8b8.dc8e
Priority:
8192
TimeSinceTopologyChange:
0d:
0h:
43m:
39s
TopologyChanges:
0
DesignatedRoot:
200100D0F8B8DC8E
!
后12位是MAC地址,此处显示是Switch1自身的MAC,这说明Switch1是实例1(instance1)的生成树的根交换机
RootCost:
0RootPort:
0
3)查看接口fa0/1的生成树信息
Switch1#showspanning-treeinterfacefa0/1PortAdminPortfast:
Disabled
PortOperPortfast:
DisabledPortAdminLinkType:
auto
PortOperLinkType:
point-to-pointPortBPDUGuard:
Disabled
PortBPDUFilter:
Disabled
######MST1vlansmapped:
10
PortState:
discardingPortPriority:
128PortDesignatedRoot:
800100D0F8B81BF8
PortDesignatedCost:
0PortDesignatedBridge:
800100D0F8B81BF8
PortDesignatedPort:
0000PortForwardTransitions:
0
PortAdminPathCost:
0PortOperPathCost:
0PortRole:
disabledPort
######MST2vlansmapped:
20
PortState:
discardingPortPriority:
128PortDesignatedRoot:
800200D0F8B81BF8
PortDesignatedCost:
0PortDesignatedBridge:
800200D0F8B81BF8
PortDesignatedPort:
0000PortForwardTransitions:
0
PortAdminPathCost:
0PortOperPathCost:
0PortRole:
disabledPort
!
接口fa0/1在实例1和2上的状态均为disabledPort######MST2vlansmapped:
20!
instanc2的配置信息
BridgeAddr:
00d0.f8b8.dc8e
Priority:
32768TimeSinceTopologyChange:
0d:
0h:
43m:
39s
TopologyChanges:
0
DesignatedRoot:
200200D0F8B81BF8
!
此处显示是Switch2的MAC,这说明Switch12是实例2(instance2)的生成树的根交换机
RootCost:
190000RootPort:
Ag1
4)查看接口fa0/2的生成树信息
Switch1#showspanning-treeinterfacefa0/2
PortAdminPortfast:
DisabledPortOperPortfast:
DisabledPortAdminLinkType:
autoPortOperLinkType:
point-to-pointPortBPDUGuard:
DisabledPortBPDUFilter:
Disabled
######MST1vlansmapped:
10PortState:
discardingPortPriority:
128
PortDesignatedRoot:
800100D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
800100D0F8B81BF8PortDesignatedPort:
0000
PortForwardTransitions:
0PortAdminPathCost:
0PortOperPathCost:
0PortRole:
disabledPort
######MST2vlansmapped:
20
PortState:
discardingPortPriority:
128
PortDesignatedRoot:
800200D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
800200D0F8B81BF8PortDesignatedPort:
0000
PortForwardTransitions:
0PortAdminPathCost:
0PortOperPathCost:
0PortRole:
disabledPort!
接口fa0/2在实例1和2上的状态均为disabledPort
5)查看接口fa0/3的生成树信息
Switch1#showspanning-treeinterfacefa0/3
PortAdminPortfast:
DisabledPortOperPortfast:
DisabledPortAdminLinkType:
autoPortOperLinkType:
point-to-pointPortBPDUGuard:
DisabledPortBPDUFilter:
Disabled
######MST1vlansmapped:
10PortState:
forwardingPortPriority:
128
PortDesignatedRoot:
200100D0F8B8DC8EPortDesignatedCost:
190000
PortDesignatedBridge:
800100D0F8B81BF8PortDesignatedPort:
8003
PortForwardTransitions:
1PortAdminPathCost:
0PortOperPathCost:
200000
PortRole:
designatedPort!
fa0/3为实例1的指定端口
######MST2vlansmapped:
20PortState:
forwardingPortPriority:
128
PortDesignatedRoot:
200200D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
200200D0F8B81BF8PortDesignatedPort:
8003
PortForwardTransitions:
1PortAdminPathCost:
0PortOperPathCost:
200000
PortRole:
designatedPort!
fa0/3为实例2的指定端口
6)查看接口fa0/4的生成树信息
Switch1#showspanning-treeinterfacefa0/4
PortAdminPortfast:
DisabledPortOperPortfast:
DisabledPortAdminLinkType:
autoPortOperLinkType:
point-to-pointPortBPDUGuard:
DisabledPortBPDUFilter:
Disabled
######MST1vlansmapped:
10PortState:
forwardingPortPriority:
128
PortDesignatedRoot:
200100D0F8B8DC8EPortDesignatedCost:
190000
PortDesignatedBridge:
800100D0F8B81BF8PortDesignatedPort:
8004
PortForwardTransitions:
1PortAdminPathCost:
0PortOperPathCost:
200000
PortRole:
designatedPort!
fa0/4为实例1的指定端口
######MST2vlansmapped:
20PortState:
forwardingPortPriority:
128
PortDesignatedRoot:
200200D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
200200D0F8B81BF8PortDesignatedPort:
8004
PortForwardTransitions:
1PortAdminPathCost:
0PortOperPathCost:
200000
PortRole:
designatedPort!
fa0/4为实例2的指定端口
2.交换机Switch2的一些相应配置
(1)创建Vlan10和Vlan20
Switch2(config)#vlan10
Switch2(config-vlan)#exitSwitch2(config)#vlan20
Switch2(config-vlan)#exit
(2)设置Trunk口和端口fa0/1与fa0/2的聚合
Switch2(config)#interrangefa0/1-2
Switch2(config-if-range)#switchportmodetrunk
Switch2(config-if-range)#exit
Switch2(config)#interrangefa0/1-2
Switch2(config-if-range)#port-group1
Switch2(config-if-range)#exit
Switch2(config)#interrangefa0/3-4
Switch2(config-if-range)#switchportmodetrunkSwitch2(config-if-range)#exit
(3)开启生成树协议设为MSTP模式,并作相应设置
Switch2(config)#spanning-tree
Switch2(config)#spanning-treemodemstp
Switch2(config)#spanning-treemstconfiguration
Switch2(config-mst)#nametaishan
Switch2(config-mst)#revision1
Switch2(config-mst)#instance1vlan10
Switch2(config-mst)#instance2vlan20
Switch2(config-mst)#exit
Switch2(config)#spanning-treemst2priority8192
!
提升交换机Switch1在实例1上的优先级,这一配置能确定Switch1为instance的根桥Switch2(config)#end
验证配置:
(1)显示MSTP全局配置
Switch2#showspanning-treemstconfiguration
Multispanningtreeprotocol:
Enabled
Name:
taishan
Revision:
1
InstanceVlansMapped
01-9,11-19,21-4094
110
220
2)查看生成树信息
Switch2#showspanning-tree
StpVersion:
MSTP
SysStpStatus:
Enabled
BaseNumPorts:
24
MaxAge:
20
HelloTime:
2
ForwardDelay:
15
BridgeMaxAge:
20
BridgeHelloTime:
2
BridgeForwardDelay:
15
MaxHops:
20
TxHoldCount:
3
PathCostMethod:
Long
BPDUGuard:
Disabled
BPDUFilter:
Disabled
######MST1vlansmapped:
10
BridgeAddr:
00d0.f8b8.1bf8
Priority:
32768
TimeSinceTopologyChange:
0d:
1h:
4m:
54s
TopologyChanges:
0
DesignatedRoot:
200100D0F8B8DC8E
!
此处显示是Switch1的MAC,这说明Switch1是实例1(instance1)的生成树的根交换机RootCost:
190000
RootPort:
Ag1
######MST2vlansmapped:
20
BridgeAddr:
00d0.f8b8.1bf8
Priority:
8192
TimeSinceTopologyChange:
0d:
1h:
4m:
54s
TopologyChanges:
0
DesignatedRoot:
200200D0F8B81BF8
!
此处显示是Switch2的自身MAC,这说明Switch2是实例2(instance2)的生成树的根交换机
RootCost:
0
RootPort:
0
3)查看接口fa0/1的生成树信息
Switch2#showspanning-treeinterfacefa0/1
PortAdminPortfast:
DisabledPortOperPortfast:
DisabledPortAdminLinkType:
autoPortOperLinkType:
point-to-pointPortBPDUGuard:
DisabledPortBPDUFilter:
Disabled
######MST1vlansmapped:
10PortState:
discarding
PortPriority:
128PortDesignatedRoot:
800100D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
800100D0F8B81BF8PortDesignatedPort:
0000PortForwardTransitions:
0PortAdminPathCost:
0
PortOperPathCost:
0PortRole:
disabledPort
######MST2vlansmapped:
20PortState:
discarding
PortPriority:
128
PortDesignatedRoot:
800200D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
800200D0F8B81BF8PortDesignatedPort:
0000PortForwardTransitions:
0PortAdminPathCost:
0
PortOperPathCost:
0PortRole:
disabledPort
4)查看接口fa0/2的生成树信息
Switch2#showspanning-treeinterfacefa0/2PortAdminPortfast:
DisabledPortOperPortfast:
DisabledPortAdminLinkType:
autoPortOperLinkType:
point-to-pointPortBPDUGuard:
Disabled
PortBPDUFilter:
Disabled
######MST1vlansmapped:
10PortState:
discardingPortPriority:
128PortDesignatedRoot:
800100D0F8B81BF8PortDesignatedCost:
0PortDesignatedBridge:
800100D0F8B81BF8PortDesignatedPort:
0000PortForwardTransitions:
0PortAdminPathCost:
0PortOperPathCost:
0PortRole:
disabledPort
######MST2vlansmapped:
20
PortState:
discardingPortPriority:
128PortDesignatedRoot:
800200D0F8B81BF8PortDesignatedCost:
0
PortDesignatedBridge:
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