H3C 7006E MAC地址漂移，怎麼解決

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1.7  環路檢測典型配置舉例

1.7.1  環路檢測基本功能配置舉例

1. 組網需求

·     三台設備Device A、Device B和Device C組成一個物理上的環形網絡。

·     通過在Device A上配置環路檢測功能，使係統能夠自動關閉Device A上出現環路的端口，並通過打印日誌信息來通知用戶檢查網絡。

2. 組網圖

圖1-3 環路檢測基本功能配置組網圖

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3. 配置步驟

(1)     配置Device A

# 創建VLAN 100，並全局開啟該VLAN內的環路檢測功能。

<DeviceA> system-view

[DeviceA] vlan 100

[DeviceA–vlan100] quit

[DeviceA] loopback-detection global enable vlan 100

# 配置端口GigabitEthernet1/0/1和GigabitEthernet1/0/2為Trunk類型，並允許VLAN 100通過。

[DeviceA] interface gigabitethernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] port link-type trunk

[DeviceA-GigabitEthernet1/0/1] port trunk permit vlan 100

[DeviceA-GigabitEthernet1/0/1] quit

[DeviceA] interface gigabitethernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] port link-type trunk

[DeviceA-GigabitEthernet1/0/2] port trunk permit vlan 100

[DeviceA-GigabitEthernet1/0/2] quit

# 全局配置環路檢測的處理模式為Shutdown模式。

[DeviceA] loopback-detection global action shutdown

# 配置環路檢測的時間間隔為35秒。

[DeviceA] loopback-detection interval-time 35

(2)     配置Device B

# 創建VLAN 100。

<DeviceB> system-view

[DeviceB] vlan 100

[DeviceB–vlan100] quit

# 配置端口GigabitEthernet1/0/1和GigabitEthernet1/0/2為Trunk類型，並允許VLAN 100通過。

[DeviceB] interface gigabitethernet 1/0/1

[DeviceB-GigabitEthernet1/0/1] port link-type trunk

[DeviceB-GigabitEthernet1/0/1] port trunk permit vlan 100

[DeviceB-GigabitEthernet1/0/1] quit

[DeviceB] interface gigabitethernet 1/0/2

[DeviceB-GigabitEthernet1/0/2] port link-type trunk

[DeviceB-GigabitEthernet1/0/2] port trunk permit vlan 100

[DeviceB-GigabitEthernet1/0/2] quit

(3)     配置Device C

# 創建VLAN 100。

<DeviceC> system-view

[DeviceC] vlan 100

[DeviceC–vlan100] quit

# 配置端口GigabitEthernet1/0/1和GigabitEthernet1/0/2為Trunk類型，並允許VLAN 100通過。

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] port link-type trunk

[DeviceC-GigabitEthernet1/0/1] port trunk permit vlan 100

[DeviceC-GigabitEthernet1/0/1] quit

[DeviceC] interface gigabitethernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] port link-type trunk

[DeviceC-GigabitEthernet1/0/2] port trunk permit vlan 100

[DeviceC-GigabitEthernet1/0/2] quit

4. 驗證配置

當配置完成後，係統在一個環路檢測時間間隔內在Device A的端口GigabitEthernet1/0/1和GigabitEthernet1/0/2上都檢測到了環路，於是將這兩個端口自動關閉，並打印了如下日誌信息：

[DeviceA]

%Feb 24 15:04:29:663 2013 DeviceA LPDT/4/LPDT_LOOPED: Loopback exists on GigabitEthernet1/0/1.

%Feb 24 15:04:29:665 2013 DeviceA LPDT/4/LPDT_VLAN_LOOPED: Loopback exists on GigabitEthernet1/0/1 in VLAN 100.

%Feb 24 15:04:29:667 2013 DeviceA LPDT/4/LPDT_LOOPED: Loopback exists on GigabitEthernet1/0/2.

%Feb 24 15:04:29:669 2013 DeviceA LPDT/4/LPDT_VLAN_LOOPED: Loopback exists on GigabitEthernet1/0/2 in VLAN 100.

%Feb 24 15:04:44:240 2013 DeviceA LPDT/5/LPDT_RECOVERED: Loopback on GigabitEthernet1/0/1 in VLAN 100 recovered.

%Feb 24 15:04:44:243 2013 DeviceA LPDT/5/LPDT_RECOVERED: Loopback on GigabitEthernet1/0/1 recovered.

%Feb 24 15:04:44:245 2013 DeviceA LPDT/5/LPDT_RECOVERED: Loopback on GigabitEthernet1/0/2 in VLAN 100 recovered.

%Feb 24 15:04:44:248 2013 DeviceA LPDT/5/LPDT_RECOVERED: Loopback on GigabitEthernet1/0/2 recovered.

使用display loopback-detection命令可以查看Device A上環路檢測的配置和運行情況：

# 顯示Device A上環路檢測的配置和運行情況。

[DeviceA] display loopback-detection

Loopback detection is enabled.

Loopback detection interval is 35 second(s).

No loopback is detected.

由此可見，Device A上並未顯示在端口GigabitEthernet1/0/1和GigabitEthernet1/0/2上檢測到環路，這是由於環路檢測功能運行在Shutdown模式下，端口GigabitEthernet1/0/1和GigabitEthernet1/0/2上出現環路後均已被自動關閉，因此這兩個端口上的環路已消除。此時，使用display interface命令分別查看Device A上端口GigabitEthernet1/0/1和GigabitEthernet1/0/2的狀態信息：

# 顯示Device A上端口GigabitEthernet1/0/1的狀態信息。

[DeviceA] display interface gigabitethernet 1/0/1

GigabitEthernet1/0/1 current state: DOWN (Loopback detection down)

...

# 顯示Device A上端口GigabitEthernet1/0/2的狀態信息。

[DeviceA] display interface gigabitethernet 1/0/2

GigabitEthernet1/0/2 current state: DOWN (Loopback detection down)

...

由此可見，端口GigabitEthernet1/0/1和GigabitEthernet1/0/2均已被環路檢測模塊自動關閉。