stp vlan 链路汇聚大综合

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xjsunjie 2010-11-05 11:22:04 博主文章分类：cisco园地 ©著作权

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实验名称：stp vlan 链路汇聚大综合实验
实验目的：熟练运用和配置stp vlan 链路汇聚
实验设计：
1、在交换机上配置VLAN，控制广播流量
2、配置2台三层交换机之间的EthernetChannel，实现三层交换机之间的高速互通
3、配置VTP，实现从三层交换单一平台管理下面二层交换的VLAN
4、配置STP，实现负载分担和冗余互通
5、在三层交换机上配置VLAN间路由，实现不同VLAN之间互通
实验拓扑图：

主要配置：
三层交换机上的配置
sw1:
interface FastEthernet0/19
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/20
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/21
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/22
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/23
channel-group 1 mode on
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/24
channel-group 1 mode on
switchport trunk encapsulation dot1q
switchport mode trunk

interface Port-channel 1
switchport trunk encapsulation dot1q
switchport mode trunk

interface Vlan10
ip address 192.168.10.1 255.255.255.0
!
interface Vlan20
ip address 192.168.20.1 255.255.255.0
!
interface Vlan30
ip address 192.168.30.1 255.255.255.0
!
interface Vlan40
ip address 192.168.40.1 255.255.255.0

spanning-tree vlan 10,20 priority 24576
spanning-tree vlan 30,40 priority 28762

sw2：
interface FastEthernet0/19
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/20
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/21
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/22
switchport trunk encapsulation dot1q
switchport mode trunk

interface FastEthernet0/23
channel-group 1 mode on
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/24
channel-group 1 mode on
switchport trunk encapsulation dot1q
switchport mode trunk

interface Port-channel 1
switchport trunk encapsulation dot1q
switchport mode trunk

spanning-tree vlan 30,40 priority 24576
spanning-tree vlan10,20 priority 28762

其他四个二层的交换机，把上联端口设trunk，再把pc相连的端口加入各自的vlan即可。

验证：
在二层交换机上输入命令show spanning-tree来观察：
2cengsw2：(二层里加入vlan 20的交换机)
VLAN0020
Spanning tree enabled protocol ieee
Root ID    Priority    24596
             Address     00D0.FF9E.E492
             Cost        19
             Port        23(FastEthernet0/23)
             Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority    32788 (priority 32768 sys-id-ext 20)
             Address     000B.BE88.6471
             Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
             Aging Time 20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/23           Root FWD 19        128.23   P2p
Fa0/24           Altn BLK 19        128.24   P2p

2cengsw3：(二层里加入vlan 30的交换机)
VLAN0030
Spanning tree enabled protocol ieee
Root ID    Priority    24606
             Address     0090.2156.B192
             Cost        19
             Port        24(FastEthernet0/24)
             Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority    32798 (priority 32768 sys-id-ext 30)
             Address     00D0.5822.D844
             Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
             Aging Time 20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/23           Altn BLK 19        128.23   P2p
Fa0/24           Root FWD 19        128.24   P2p

总结：利用stp实现了交换机vlan流量的负载分担和冗余互通。