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helloTime: 2 bridgeHelloTime: 2
forwardDelay: 15 bridgeFwdDelay: 15
holdTime: 1 rootCost: 0
rootPort: No Port priority: 0x7000
---------------------------------------------------------------------------
2.連接冗余鏈路，調(diào)整備份主交換機上級聯(lián)端口費用，使之處于轉(zhuǎn)發(fā)狀態(tài) 。
Login: admin //用admin用戶登錄備份主交換機
Password:
Menu options: --------------[1m3Com SuperStack 3 Switch 3300[0m---------------
bridge - Administer bridging/VLANS
ethernet - Administer Ethernet ports
feature - Administer system features
ip - Administer IP
logout - Logout of the Command Line Interface
snmp - Administer SNMP
system - Administer system-level functions
Type ? for help.
----------------------------------[1msecondary3300 (1)[0m---------------------
Select menu option: bri //選擇bridge菜單
Menu options: --------------[1m3Com SuperStack 3 Switch 3300[0m---------------
agingTime - Set the bridge address aging time
display - Display bridge information
multicastFiltering - Administer multicast filtering
port - Administer bridge ports
stpForwardDelay - Set the bridge Spanning Tree forward delay
stpHelloTime - Set the bridge Spanning Tree hello timer
stpMaxAge - Set the bridge Spanning Tree maximum age
stpPriority - Set the Spanning Tree bridge Priority
stpState - Enable/Disable Spanning Tree on a bridge
vlan - Administer VLANs
Type "q" to return to the previous menu or ? for help.
----------------------------------[1msecondary3300 (1)[0m---------------------
Select menu option (bridge): port //選擇port菜單
Menu options: --------------[1m3Com SuperStack 3 Switch 3300[0m---------------
address - Administer bridge addresses
detail - Display detail information
stpCost - Set the Spanning Tree path cost
stpFastStart - Enable/Disable Fast Start per port
summary - Display summary information
vltMode - Enable/Disable VLT tagging on a port
Type "q" to return to the previous menu or ? for help.
----------------------------------[1msecondary3300 (1)[0m---------------------
Select menu option (bridge/port): summ //選擇summary菜單
Select bridge port (1-24,all) [all]: all //查看所有端口STP狀態(tài)
Port stpState fwdTransitions stpCost
--------------------------------------------------------------------
1 Disabled 1 18
2 Disabled 0 19
3 Disabled 0 19
4 Disabled 0 19
5 Disabled 0 19
6 Disabled 0 19
7 Disabled 0 19
8 Disabled 0 19
9 Disabled 0 19
10 Disabled 0 19
11 Disabled 0 19
12 Disabled 0 19
13 Disabled 0 19
14 Disabled 0 19
15 Disabled 0 19
16 Disabled 0 19
17 Disabled 0 19
18 Disabled 0 19
19 Disabled 0 19
20 Forwarding 1 18
21 Blocking 0 18
Enterfor more or "q" to quit--:
22 Blocking 0 18
23 Blocking 0 18
24 Blocking 0 18
-------------------------------------------------------------
此時端口是這樣連接的，主交換機20-23口依次連接下面4臺華為2026B的第23口，備份主交換機20-23口依次連接下面4臺華為2026B的第24口，主交換機和備份主交換機之間都在第24口用一根反線級聯(lián) ?？梢钥吹降?0口處于轉(zhuǎn)發(fā)狀態(tài)，大致因為STP優(yōu)先級都為ox7000，且端口費用都為18(百兆全雙工)，因此選取MAC地址最低的端口處于轉(zhuǎn)發(fā)狀態(tài) 。將備份主交換機第20端口斷開，可以看到第21端口處于轉(zhuǎn)發(fā)狀態(tài)了，如下所示。
----------------------------------[1msecondary3300 (1)[0m---------------------
Select menu option (bridge/port): summ
Select bridge port (1-24,all) [all]: all
Port stpState fwdTransitions stpCost
--------------------------------------------------------------------

在部分設(shè)備支持STP協(xié)議的網(wǎng)絡(luò)中實施STP( 三 )

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