2950交換機(jī)簡(jiǎn)要配置手冊(cè)（中文）-全文預(yù)覽
【正文】 nterface range fastether 0/1 – 5 是有效的，而interface range fastether 0/15 是無(wú)效的 . ? interface range 命令只能配置已經(jīng)存在的 interface vlan ? 所有在同一組的端口必須是相同類別的。 show interfaces [interfaceid] description 顯示端口描述 show runningconfig interface [interfaceid] 顯示當(dāng)前配置中的端口配置情況 show version 顯示軟硬件等情況 舉例如下 : Switch show interfaces status Port Name Status Vlan Duplex Speed Type Gi0/1 connected routed afull a100 10/100/1000Base TX Gi0/2 wce server disabled routed auto auto 10/100/1000Base TX Gi0/3 ip wccp webcache notconnect routed auto auto 10/100/1000Base TX Gi0/4 notconnect routed auto auto 10/100/1000Base TX Gi0/5 notconnect routed auto auto 10/100/1000Base TX Gi0/6 disabled routed auto auto 10/100/1000Base TX Gi0/7 disabled routed auto auto 10/100/1000Base TX Gi0/8 disabled routed auto 100 10/100/1000Base TX Gi0/9 notconnect routed auto auto 10/100/1000Base TX Gi0/10 notconnect routed auto auto 10/100/1000Base TX Gi0/11 disabled routed auto auto unknown Gi0/12 notconnect routed auto auto unknown Switch show interfaces fastether 0/1 switchport Name: Fa0/1 Switchport: Enabled Administrative Mode: static access Operational Mode: down Administrative Trunking Encapsulation: dot1q Negotiation of Trunking: Off Access Mode VLAN: 1 (default) Trunking Native Mode VLAN: 1 (default) Trunking VLANs Enabled: ALL Pruning VLANs Enabled: 21001 Protected: false Unknown unicast blocked: disabled Unknown multicast blocked: disabled Voice VLAN: dot1p (Inactive) Appliance trust: 5 Switch show runningconfig interface fastether0/2 Building configuration... Current configuration : 131 bytes ! interface FastEther0/2 switchport mode access switchport protected no ip address mls qos cos 7 mls qos cos override end 刷新、重置端口及計(jì)數(shù)器 Clear 命令 目的 clear counters [interfaceid] 清除端口計(jì)數(shù)器 . clear line [number | console 0 | vty number] 重置異步串口的硬件邏輯 Note clear counters 命令只清除用 show interface 所顯示的計(jì)數(shù)，不影響用 snmp 得到的計(jì)數(shù) 舉例如下： Switch clear counters fastether0/5 Clear show interface counters on this interface [confirm] y Switch *Sep 30 08:42:55: %CLEAR5COUNTERS: Clear counter on interface FastEther0/5 by vty1 () 可使用 clear line 命令來(lái)清除或重置某一端口或串口，在大部分情況下并不需要這樣做 : Switch clear interface fastether0/5 關(guān)閉和打開(kāi)端口 命令 目的 Step 1 configure terminal 進(jìn)入配置狀態(tài) Step 2 interface {vlan vlanid} | {{fastether | gigabitether} interfaceid} | {portchannel portchannelnumber} 選擇要關(guān)閉的端口 Step 3 shutdown 關(guān)閉 Step 4 end 退出 Step 5 show runningconfig 驗(yàn)證 使用 no shutdown 命令重新打開(kāi)端口 . 舉例如下 : Switch configure terminal Switch(config) interface fastether0/5 Switch(configif) shutdown Switch(configif) *Sep 30 08:33:47: %LINK5CHANGED: Interface FastEther0/5, changed state to a administratively down Switch configure terminal Switch(config) interface fastether0/5 Switch(configif) no shutdown Switch(configif) *Sep 30 08:36:00: %LINK3UPDOWN: Interface FastEther0/5, changed state to up 配置 VLAN 理解 VLAN 一個(gè) VLAN 就是一個(gè)交換網(wǎng)， 其邏輯上按功能、項(xiàng)目、應(yīng)用來(lái)分而不必考慮用戶的物理位置。在 3550 上 VLAN 之間的數(shù)據(jù)包可以由 VLAN 端口進(jìn)行轉(zhuǎn)發(fā)。本交換機(jī)支持 ISL 及 IEEE trunk 二種封裝。 Step 3 name vlanname (可選 )輸入一個(gè) VLAN 名，如果沒(méi)有配置 VLAN 名，缺省的名字是 VLAN 號(hào)前面用 0填滿的 4位數(shù)，如 VLAN0004是 VLAN4的缺省名字 Step 4 mtu mtusize (可選 ) 改變 MTU 大小 Step 5 end 退出 Step 6 show vlan {name vlanname |
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