一.單域多生成樹的配置
實驗目的：
創建多生成樹的域
創建實例----相當於捆綁在一起的vlan
實現負載均衡
實驗步驟
開啟STP---創建vlan---配置的MST域---開啟trunk鏈路
[gaocw1]vlan 2 to 30 //創建vlan 2 到30
請等待...... 完成.
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[gaocw1]stp enable //開啟生成樹協議
[gaocw1]stp region-configuration //進入MST 域視圖
[gaocw1-mst-region]region-name wang //配置MST域名
[gaocw1-mst-region]instance 1 vlan 2 to 10 //配置生成樹實例
[gaocw1-mst-region]instance 2 vlan 11 to 20
[gaocw1-mst-region]instance 3 vlan 21 to 30
[gaocw1-mst-region]active region-configuration
此處我沒有設置修訂值，因為默認修訂值都是0，不
影響我們設置單域！
介紹幾個域內的命令
check region-configuration：本命令用來顯示尚未激活的
MST 域的配置信息，
revision-level： 命令用來配置交換機的MSTP 修訂級別
查看MST與的信息
[gaocw1]display stp region-configuration
操作值：
格式選擇符 :0
域名 :wang
修訂級別 :0
實例 映射的VLAN
0 1, 31 to 4094
1 2 to 10
2 11 to 20
3 21 to 30
[gaocw1]int e1/0/2
[gaocw1-Ethernet1/0/2]port link-type trunk
[gaocw1-Ethernet1/0/2]port trunk permit vlan all
請等待........................................... 完成.
[gaocw1-Ethernet1/0/6]port link-type trunk
[gaocw1-Ethernet1/0/6]port trunk permit vlan all
請等待........................................... 完成.
配置sw2的過程同sw1
[gaocw2]vlan 2 to 30
請等待...... 完成.
[gaocw2]stp enable[高1]
%2000/4/2 00:07:15:646 gaocw2 MSTP/3/STPSTART:- 1 -設備啟用生成樹功能
[gaocw2]stp region-configuration
[gaocw2-mst-region]region-name wang
[gaocw2-mst-region]instance 1 vlan 2 to 10
[gaocw2-mst-region]instance 2 vlan 11 to 20
[gaocw2-mst-region]instance 3 vlan 21 to 30
[gaocw2-mst-region]active region-configuration
[gaocw2]display stp region-configuration
操作值：
格式選擇符 :0
域名 :wang
修訂級別 :0
實例 映射的VLAN
0 1, 31 to 4094
1 2 to 10
2 11 to 20
3 21 to 30
[gaocw2]int e1/0/2
[gaocw2-Ethernet1/0/2]port link-type trunk
[gaocw2-Ethernet1/0/2]port trunk permit vlan all
請等待........................................... 完成.
[gaocw2]int e1/0/4
[gaocw2-Ethernet1/0/4]port link-type trunk
[gaocw2-Ethernet1/0/4]port trunk permit vlan all
請等待........................................... 完成.
配置sw3的過程同sw1
[H3C]sys gaocw3
[gaocw3]stp enable
%2000/4/2 00:14:33:275 gaocw3 MSTP/3/STPSTART:- 1 -設備啟用生成樹功能
[gaocw3]vlan 2 to 30
請等待...... 完成.
[gaocw3]stp region-configuration
[gaocw3-mst-region]region-name wang
[gaocw3-mst-region]instance 1 vlan 2 to 10
[gaocw3-mst-region]instance 2 vlan 11 to 20
[gaocw3-mst-region]instance 3 vlan 21 to 30
[gaocw3-mst-region]active region-configuration
[gaocw3]display stp region-configuration
操作值：
格式選擇符 :0
域名 :wang
修訂級別 :0
實例 映射的VLAN
0 1, 31 to 4094
1 2 to 10
2 11 to 20
3 21 to 30
[gaocw3]int e1/0/4
[gaocw3-Ethernet1/0/4]port link-type trunk
[gaocw3-Ethernet1/0/4]port trunk permit vlan all
請等待........................................... 完成.
[gaocw3]int e1/0/6
[gaocw3-Ethernet1/0/6]port link-type trunk
[gaocw3-Ethernet1/0/6]port trunk permit vlan all
請等待........................................... 完成.
當我們都設置完后，就可以看一下配置的情況，從sw1看起！
[gaocw1]display stp brief
MSTID 端口 角色 STP狀態 保護類型
0 Ethernet1/0/2 ROOT FORWARDING NONE
0 Ethernet1/0/6 ALTE DISCARDING NONE
1 Ethernet1/0/2 ROOT FORWARDING NONE
1 Ethernet1/0/6 ALTE DISCARDING NONE
2 Ethernet1/0/2 ROOT FORWARDING NONE
2 Ethernet1/0/6 ALTE DISCARDING NONE
3 Ethernet1/0/2 ROOT FORWARDING NONE
3 Ethernet1/0/6 ALTE DISCARDING NONE
[gaocw2]display stp brief
MSTID 端口 角色 STP狀態 保護類型
0 Ethernet1/0/2 DESI FORWARDING NONE
0 Ethernet1/0/4 DESI FORWARDING NONE
1 Ethernet1/0/2 DESI FORWARDING NONE
1 Ethernet1/0/4 DESI FORWARDING NONE
2 Ethernet1/0/2 DESI FORWARDING NONE
2 Ethernet1/0/4 DESI FORWARDING NONE
3 Ethernet1/0/2 DESI FORWARDING NONE
3 Ethernet1/0/4 DESI FORWARDING NONE
[gaocw3]display stp brief
MSTID 端口 角色 STP狀態 保護類型
0 Ethernet1/0/4 ROOT FORWARDING NONE
0 Ethernet1/0/6 DESI FORWARDING NONE
1 Ethernet1/0/4 ROOT FORWARDING NONE
1 Ethernet1/0/6 DESI FORWARDING NONE
2 Ethernet1/0/4 ROOT FORWARDING NONE
2 Ethernet1/0/6 DESI FORWARDING NONE
3 Ethernet1/0/4 ROOT FORWARDING NONE
3 Ethernet1/0/6 DESI FORWARDING NONE
總結，此時我們看到的是--sw2是所有實例的跟橋，包括系統自動生成的實例0
所以不符合我們所說的負責均衡！
接下來，實現MSTP的負載均衡功能
[gaocw1]int e1/0/1
[gaocw1-Ethernet1/0/1]stp edged-port enable[高2] //配置連接終端設備的端口為域邊界端口！
[gaocw1]stp instance 2 root ?
primary 主根交換機
secondary 備份根交換機
[gaocw1]stp instance 2 root primary //讓sw1為實例二的主根橋，
[gaocw1]stp instance 3 root secondary //讓sw1為實例三的備份跟橋。
[gaocw3]stp instance 2 root secondary //讓sw3為實例二的備份跟橋
[gaocw3]stp instance 3 root primary //讓sw1為實例三的主根橋
現在查看----就實現了負載分擔功能
[gaocw2]display stp brief
MSTID 端口 角色 STP狀態 保護類型
0 Ethernet1/0/2 DESI FORWARDING NONE
0 Ethernet1/0/4 DESI FORWARDING NONE
1 Ethernet1/0/2 DESI FORWARDING NONE
1 Ethernet1/0/4 DESI FORWARDING NONE
2 Ethernet1/0/2 ROOT FORWARDING NONE
2 Ethernet1/0/4 ALTE DISCARDING NONE
3 Ethernet1/0/2 ALTE DISCARDING NONE
3 Ethernet1/0/4 ROOT FORWARDING NONE
[gaocw1]display stp brief
MSTID 端口 角色 STP狀態 保護類型
0 Ethernet1/0/2 ROOT FORWARDING NONE
0 Ethernet1/0/6 ALTE DISCARDING NONE
1 Ethernet1/0/2 ROOT FORWARDING NONE
1 Ethernet1/0/6 ALTE DISCARDING NONE
2 Ethernet1/0/2 DESI FORWARDING NONE
2 Ethernet1/0/6 DESI FORWARDING NONE
3 Ethernet1/0/2 DESI FORWARDING NONE
3 Ethernet1/0/6 ROOT FORWARDING NONE
二.多域生成樹的配置
通過此拓撲來實現多區域的生成樹設置
上圖的補充，因為模擬器沒有合適的實驗拓撲。
實驗步驟
開啟stp--創建vlan---配置mstp域---開啟trunk鏈路
配置sw1,--實例2 to 5-----域名：wnt
[sw1]vlan 2 to 30
Please wait... Done.
[sw1]stp region-configuration
[sw1-mst-region]instance 1 vlan 2 to 5
[sw1-mst-region]region-name wnt
[sw1-mst-region]active region-configuration
[sw1]display stp region-configuration
Oper configuration
Format selector :0
Region name :wnt
Revision level :0
Instance Vlans Mapped
0 1, 6 to 4094
1 2 to 5
sw1]int e0/4/4
[sw1-Ethernet0/4/4]port link-type trunk
[sw1-Ethernet0/4/4]port trunk permit vlan all
[sw1]int e0/4/3
[sw1-Ethernet0/4/3]port link-type trunk
[sw1-Ethernet0/4/3]port trunk permit vlan all
配置sw2---實例2 to 6----域名：gao
[sw2]vlan 2 to 10
Please wait... Done.
[sw2]stp region-configuration
[sw2-mst-region]instance 1 vlan 2 to 6
[sw2-mst-region]region-name gao
[sw2-mst-region]active re
[sw2]int e0/4/3
[sw2-Ethernet0/4/3]port link-type trunk
[sw2-Ethernet0/4/3]port trunk permit vlan all
Please wait........................................... Done.
[sw2]int e0/4/6
[sw2-Ethernet0/4/6]port link-type trunk
[sw2-Ethernet0/4/6]port trunk permit vlan all
Please wait........................................... Done.
[sw2]display stp brief
MSTID Port Role STP State Protection
0 Ethernet0/4/3 ROOT FORWARDING NONE
0 Ethernet0/4/6 DESI FORWARDING NONE
1 Ethernet0/4/3 MAST FORWARDING NONE
1 Ethernet0/4/6 DESI FORWARDING NONE
配置sw3---實例2 to 7---域名：cheng
[sw3]vlan 2 to 10
Please wait... Done.
[sw3]stp region-configuration
[sw3-mst-region]instance 1 vlan 2 to 7
[sw3-mst-region]region-name cheng
[sw3-mst-region]active region-configuration
[sw3]int e0/4/4
[sw3-Ethernet0/4/4]port link-type trunk
[sw3-Ethernet0/4/4]port trunk permit vlan all
Please wait........................................... Done.
[sw3-Ethernet0/4/4]int e0/4/7
[sw3-Ethernet0/4/7]port link-type trunk
[sw3-Ethernet0/4/7]port trunk permit vlan all
Please wait........................................... Done.
[sw3]display stp brief
MSTID Port Role STP State Protection
0 Ethernet0/4/4 ROOT FORWARDING NONE
0 Ethernet0/4/7 DESI FORWARDING NONE
1 Ethernet0/4/4 MAST FORWARDING NONE
1 Ethernet0/4/7 DESI FORWARDING NONE
配置sw4--實例2 to 8----域名：wang
[sw4]vlan 2 to 10
[sw4]stp region-configuration
[sw4-mst-region]instance 1 vlan 2 to 8
[sw4-mst-region]region-name wang
[sw4-mst-region]active region-configuration
[sw4]display stp region-configuration
Oper configuration
Format selector :0
Region name :wang
Revision level :0
Instance Vlans Mapped
0 1, 9 to 4094
1 2 to 8
[sw4]int e0/4/7
[sw4-Ethernet0/4/7]port link-type trunk
[sw4-Ethernet0/4/7]port trunk permit vlan all
Please wait........................................... Done.
[sw4-Ethernet0/4/7]int e0/4/6
[sw4-Ethernet0/4/6]port link-type trunk
[sw4-Ethernet0/4/6]port trunk permit vlan al
Please wait........................................... Done.
[sw4]display stp brief
MSTID Port Role STP State Protection
0 Ethernet0/4/6 ROOT FORWARDING NONE
0 Ethernet0/4/7 ALTE DISCARDING NONE
1 Ethernet0/4/6 MAST FORWARDING NONE
1 Ethernet0/4/7 ALTE DISCARDING NON
然后個vlan2配置ip地址，他們是可以ping通的！從而實現了不同域之間的通信！！
MSTP域內的參數---------------對應本實驗
1. MST 域
2. MSTI
3. VLAN 映射表
4. IST
5. CST
6. CIST
7. 域根
8. 總根
9. 端口角色
對上面的參數進行本實驗的總結：
1.MST域：本實驗有4個MST 域，分別是wnt、gao、cheng、wang。
2.MSTI：一個生成樹實例，例如：wnt域中的所有實例1的集合。
3.Vlan映射表：就是實例
4.IST：下圖介紹
5.CIT:下圖介紹
6.CIST:下圖介紹
7.域根：有4個，多個域根相連組成一個CIST域
8.總根：有1個。
9.端口狀態
sw4中的e0/4/7屬於整個大域（CIST）的阻塞端口！
Master 端口是連接MST 域到總根的端口，位於整個域到總根的最短路徑上。
就相當於我們在單域中所說的根端口
關閉生成樹：stp disable
在接口上設置也是如此：
[SWA-Ethernet1/0/4] stp enable 開啟
[SWA-Ethernet1/0/4] stp disable 關閉
關閉邊界端口屬性：stp edged-port disable