交换机接口联动

.4  Monitor Link典型配置举例

1. 组网需求

·     在图1-2所示的组网中，Device C为Smart Link设备，Device A、Device B和Device D为相关设备。Device C上VLAN 1～30的流量通过Smart Link组双上行到Device A。

·     通过配置，在Device C上实现双上行链路的灵活备份，并且当Device A与Device B（或Device D）之间出现链路故障时，Device C能够感知到这个故障并完成其上行链路的切换。

2. 组网图

图1-2 Monitor Link典型配置组网图

3. 配置步骤

(1)     配置Device C

# 创建VLAN 1～30，将这些VLAN都映射到MSTI 1上，并激活MST域的配置。

<DeviceC> system-view

[DeviceC] vlan 1 to 30

[DeviceC] stp region-configuration

[DeviceC-mst-region] instance 1 vlan 1 to 30

[DeviceC-mst-region] active region-configuration

[DeviceC-mst-region] quit

# 分别关闭端口GigabitEthernet3/0/1和GigabitEthernet3/0/2，在这两个端口上分别关闭生成树协议，并将端口配置为Trunk端口且允许VLAN 1～30通过。

[DeviceC] interface GigabitEthernet 3/0/1

[DeviceC-GigabitEthernet3/0/1] shutdown

[DeviceC-GigabitEthernet3/0/1] undo stp enable

[DeviceC-GigabitEthernet3/0/1] port link-type trunk

[DeviceC-GigabitEthernet3/0/1] port trunk permit vlan 1 to 30

[DeviceC-GigabitEthernet3/0/1] quit

[DeviceC] interface GigabitEthernet 3/0/2

[DeviceC-GigabitEthernet3/0/2] shutdown

[DeviceC-GigabitEthernet3/0/2] undo stp enable

[DeviceC-GigabitEthernet3/0/2] port link-type trunk

[DeviceC-GigabitEthernet3/0/2] port trunk permit vlan 1 to 30

[DeviceC-GigabitEthernet3/0/2] quit

# 创建Smart Link组1，并配置其保护VLAN为MSTI 1所映射的VLAN。

[DeviceC] smart-link group 1

[DeviceC-smlk-group1] protected-vlan reference-instance 1

# 配置Smart Link组1的主端口为GigabitEthernet3/0/1，从端口为GigabitEthernet3/0/2。

[DeviceC-smlk-group1] port GigabitEthernet 3/0/1 primary

[DeviceC-smlk-group1] port GigabitEthernet 3/0/2 secondary

# 在Smart Link组1中使能发送Flush报文的功能。

[DeviceC-smlk-group1] flush enable

[DeviceC-smlk-group1] quit

# 重新开启端口GigabitEthernet3/0/1和GigabitEthernet3/0/2。

[DeviceC] interface GigabitEthernet 3/0/1

[DeviceC-GigabitEthernet3/0/1] undo shutdown

[DeviceC-GigabitEthernet3/0/1] quit

[DeviceC] interface GigabitEthernet 3/0/2

[DeviceC-GigabitEthernet3/0/2] undo shutdown

[DeviceC-GigabitEthernet3/0/2] quit

(2)     配置Device A

# 创建VLAN 1～30。

<DeviceA> system-view

[DeviceA] vlan 1 to 30

# 分别将端口GigabitEthernet3/0/1和GigabitEthernet3/0/2配置为Trunk端口且允许VLAN 1～30通过，并在这些端口上都使能接收Flush报文的功能。

[DeviceA] interface GigabitEthernet 3/0/1

[DeviceA-GigabitEthernet3/0/1] port link-type trunk

[DeviceA-GigabitEthernet3/0/1] port trunk permit vlan 1 to 30

[DeviceA-GigabitEthernet3/0/1] smart-link flush enable

[DeviceA-GigabitEthernet3/0/1] quit

[DeviceA] interface GigabitEthernet 3/0/2

[DeviceA-GigabitEthernet3/0/2] port link-type trunk

[DeviceA-GigabitEthernet3/0/2] port trunk permit vlan 1 to 30

[DeviceA-GigabitEthernet3/0/2] smart-link flush enable

[DeviceA-GigabitEthernet3/0/2] quit

(3)     配置Device B

# 创建VLAN 1～30。

<DeviceB> system-view

[DeviceB] vlan 1 to 30

# 分别将端口GigabitEthernet3/0/1和GigabitEthernet3/0/2配置为Trunk端口且允许VLAN 1～30通过，在端口GigabitEthernet3/0/2上关闭生成树协议，并在这些端口上都使能接收Flush报文的功能。

[DeviceB] interface GigabitEthernet 3/0/1

[DeviceB-GigabitEthernet3/0/1] port link-type trunk

[DeviceB-GigabitEthernet3/0/1] port trunk permit vlan 1 to 30

[DeviceB-GigabitEthernet3/0/1] smart-link flush enable

[DeviceB-GigabitEthernet3/0/1] quit

[DeviceB] interface GigabitEthernet 3/0/2

[DeviceB-GigabitEthernet3/0/2] undo stp enable

[DeviceB-GigabitEthernet3/0/2] port link-type trunk

[DeviceB-GigabitEthernet3/0/2] port trunk permit vlan 1 to 30

[DeviceB-GigabitEthernet3/0/2] smart-link flush enable

[DeviceB-GigabitEthernet3/0/2] quit

# 创建Monitor Link组1，并配置该组的上行接口为GigabitEthernet3/0/1，下行接口为GigabitEthernet3/0/2。

[DeviceB] monitor-link group 1

[DeviceB-mtlk-group1] port GigabitEthernet 3/0/1 uplink

[DeviceB-mtlk-group1] port GigabitEthernet 3/0/2 downlink

[DeviceB-mtlk-group1] quit

(4)     配置Device D

# 创建VLAN 1～30。

<DeviceD> system-view

[DeviceD] vlan 1 to 30

# 分别将端口GigabitEthernet3/0/1和GigabitEthernet3/0/2配置为Trunk端口且允许VLAN 1～30通过，在端口GigabitEthernet3/0/2上关闭生成树协议，并在这些端口上都使能接收Flush报文的功能。

[DeviceD] interface GigabitEthernet 3/0/1

[DeviceD-GigabitEthernet3/0/1] port link-type trunk

[DeviceD-GigabitEthernet3/0/1] port trunk permit vlan 1 to 30

[DeviceD-GigabitEthernet3/0/1] smart-link flush enable

[DeviceD-GigabitEthernet3/0/1] quit

[DeviceD] interface GigabitEthernet 3/0/2

[DeviceD-GigabitEthernet3/0/2] undo stp enable

[DeviceD-GigabitEthernet3/0/2] port link-type trunk

[DeviceD-GigabitEthernet3/0/2] port trunk permit vlan 1 to 30

[DeviceD-GigabitEthernet3/0/2] smart-link flush enable

[DeviceD-GigabitEthernet3/0/2] quit

# 创建Monitor Link组1，并配置该组的上行接口为GigabitEthernet3/0/1，下行接口为GigabitEthernet3/0/2。

[DeviceD] monitor-link group 1

[DeviceD-mtlk-group1] port GigabitEthernet 3/0/1 uplink

[DeviceD-mtlk-group1] port GigabitEthernet 3/0/2 downlink

[DeviceD-mtlk-group1] quit

4. 验证配置

通过使用display monitor-link group命令可以查看各设备上Monitor Link组的信息。例如当Device A的端口GigabitEthernet3/0/2由于链路故障而down掉时：

# 显示Device B上Monitor Link组1的信息。

[DeviceB] display monitor-link group 1

Monitor link group 1 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 16:38:26 2012/4/21

  Last-down-time   : 16:37:20 2012/4/21

  Member                    Role       Status

  ------------------------------------------

  GE3/0/1                   UPLINK     UP

  GE3/0/2                   DOWNLINK   UP

# 显示Device D上Monitor Link组1的信息。

[DeviceD] display monitor-link group 1

Monitor link group 1 information:

  Group status     : DOWN

  Downlink up-delay: 0(s)

  Last-up-time     : 16:37:20 2012/4/21

  Last-down-time   : 16:38:26 2012/4/21

  Member                    Role       Status

  ------------------------------------------

  GE3/0/1                   UPLINK     DOWN

  GE3/0/2                   DOWNLINK   DOWN