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5  Smart Link与Monitor Link联动配置举例

5.1  组网需求

如图2所示，区域A和区域B分别使用VLAN 10和VLAN 11，出于可靠性考虑，接入设备Device A和Device B都提供两条链路分别双上行到汇聚设备Device C和Device D。现要求如下：

·     Device A和Device B设备通过配置Smart Link来实现链路备份。

·     当Device A到Device C和Device D的两条上行链路都正常时，区域A的数据流量优先通过Device A—>Device C的路径转发。当该链路出现故障时，Smart Link功能会将故障链路上的流量快速切换到Device A—>Device D的链路上。当链路故障恢复时，Smart Link功能又会将数据流量及时切换回原来的转发路径。

·     当Device B到Device C和Device D的两条上行链路都正常时，区域B的数据流量优先通过Device B—>Device D的路径转发。当该链路出现故障时，Smart Link功能会将故障链路上的流量快速切换到Device B—>Device C的链路上。当链路故障恢复时，Smart Link功能又会将数据流量及时切换回原来的转发路径。

·     通过配置Smart Link和Monitor Link联动，确保Device C和Device D的上行接口出现故障时能够快速感知并将下行接口的状态变为Down，触发Smart Link进行链路切换，从而最大可能地避免区域A和区域B与外部通信中断。

图2 Smart Link+Monitor Link组配置组网图

5.2  配置思路

为了实现Device A和Device B的链路备份，需在Device A和Device B上分别创建一个Smart Link组，区域A和区域B的VLAN分别为这两个Smart Link组的保护VLAN。

为了实现链路故障恢复时，区域A和区域B的数据流量仍能切换回各自原来的路径转发，需要为两个Smart Link组都配置角色抢占模式。

为了避免当Smart Link组中的主从链路切换时，由于上游设备上的MAC地址转发表项和ARP/ND表项没有及时更新，而导致下行数据流量发生中断，需要在Device A和Device B上配置发送Flush报文功能，Device C和Device D的下行端口都需要使能接收Flush报文功能。

5.3  使用版本

本举例是在S7600-X-CMW710-R7150版本上进行配置和验证的。

5.4  配置注意事项

·     如果欲配置某端口为Smart Link组的成员端口（主端口或从端口），请先手工关闭该端口，并待Smart Link组配置完成后再开启该端口，以避免形成环路，导致广播风暴。

·     在配置Smart Link组的成员端口之前，请确认端口未启用STP或者RRPP功能。

·     上游设备上配置的接收处理Flush报文的控制VLAN和在Smart Link设备上配置的发送控制VLAN需要相同。

·     不同的Smart Link组需要配置不同的控制VLAN。Smart Link组的控制VLAN应同时为该Smart Link组的保护VLAN，且不要将已配置为控制VLAN的VLAN删除，否则会影响Flush报文的发送。

·     一个接口只能属于一个Monitor Link组。

·     请勿通过shutdown或undo shutdown命令手动开启或关闭接口来改变Monitor Link组中下行接口的状态。

5.5  配置步骤

5.5.1  Device A的配置

# 配置端口GigabitEthernet 3/0/1、GigabitEthernet 3/0/2端口为Trunk口，允许VLAN 10流量通过，并关闭STP。

<DeviceA> system-view

[DeviceA] vlan 10 to 11

[DeviceA] interface GigabitEthernet 3/0/1

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

[DeviceA-GigabitEthernet3/0/1] port trunk permit vlan 10

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

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

[DeviceA-GigabitEthernet3/0/1] shutdown

[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 10

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

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

[DeviceA-GigabitEthernet3/0/2] shutdown

[DeviceA-GigabitEthernet3/0/2] quit

# 配置端口GigabitEthernet 3/0/3为Access口，分别允许VLAN 10流量通过。

[DeviceA] interface GigabitEthernet 3/0/3

[DeviceA-GigabitEthernet3/0/3] port access vlan 10

[DeviceA-GigabitEthernet3/0/3] undo shutdown

[DeviceA-GigabitEthernet3/0/3] quit

# 配置实例1绑定VLAN 10。

[DeviceA] stp region-configuration

[DeviceA-mst-region] instance 1 vlan 10

[DeviceA-mst-region] active region-configuration

[DeviceA-mst-region] quit

# 创建Smart Link组1，并配置保护MST 1所绑定的VLAN 10。

[DeviceA] smart-link group 1

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

# 配置端口GigabitEthernet 3/0/1为主端口，GigabitEthernet 3/0/2为从端口。

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

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

# 使能发送Flush报文。

[DeviceA-smlk-group1] flush enable control-vlan 10

# 配置抢占模式，配置延时抢占时间为10秒。

[DeviceA-smlk-group1] preemption mode role

[DeviceA-smlk-group1] preemption delay 10

[DeviceA-smlk-group1] quit

# 开启端口。

[DeviceA] interface GigabitEthernet 3/0/1

[DeviceA-GigabitEthernet3/0/1] undo shutdown

[DeviceA-GigabitEthernet3/0/1] quit

[DeviceA] interface GigabitEthernet 3/0/2

[DeviceA-GigabitEthernet3/0/2] undo shutdown

[DeviceA-GigabitEthernet3/0/2] quit

5.5.2  Device B的配置

# 配置端口GigabitEthernet 3/0/1、GigabitEthernet 3/0/2为Trunk口，允许VLAN 11流量通过，并使能Flush报文接收。

<DeviceB> system-view

[DeviceB] vlan 10 to 11

[DeviceB] interface GigabitEthernet 3/0/1

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

[DeviceB-GigabitEthernet3/0/1] port trunk permit vlan 11

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

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

[DeviceB-GigabitEthernet3/0/1] shutdown

[DeviceB-GigabitEthernet3/0/1] quit

[DeviceB] interface GigabitEthernet 3/0/2

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

[DeviceB-GigabitEthernet3/0/2] port trunk permit vlan 11

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

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

[DeviceB-GigabitEthernet3/0/2] shutdown

[DeviceB-GigabitEthernet3/0/2] quit

# 配置端口GigabitEthernet 3/0/3为Access口，分别允许VLAN 11流量通过。

[DeviceB] interface GigabitEthernet 3/0/3

[DeviceB-GigabitEthernet3/0/3] port access vlan 11

[DeviceB-GigabitEthernet3/0/3] undo shutdown

[DeviceB-GigabitEthernet3/0/3] quit

# 配置实例1绑定VLAN 11。

[DeviceB] stp region-configuration

[DeviceB-mst-region] instance 1 vlan 11

[DeviceB-mst-region] active region-configuration

[DeviceB-mst-region] quit

# 创建Smart Link组1，并配置保护MST 1所绑定的VLAN 11。

[DeviceB] smart-link group 1

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

# 配置端口GigabitEthernet 3/0/1为主端口，GigabitEthernet 3/0/2为从端口。

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

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

# 使能发送Flush报文。

[DeviceB-smlk-group1] flush enable control-vlan 10

# 配置抢占模式，配置延时抢占时间为10秒。

[DeviceB-smlk-group1] preemption mode role

[DeviceB-smlk-group1] preemption delay 10

[DeviceB-smlk-group1] quit

# 开启端口。

[DeviceB] interface GigabitEthernet 3/0/1

[DeviceB-GigabitEthernet3/0/1] undo shutdown

[DeviceB-GigabitEthernet3/0/1] quit

[DeviceB] interface GigabitEthernet 3/0/2

[DeviceB-GigabitEthernet3/0/2] undo shutdown

[DeviceB-GigabitEthernet3/0/2] quit

5.5.3  Device C的配置

# 配置端口GigabitEthernet 3/0/1为Trunk口，允许VLAN 10流量通过，并使能Flush报文接收。

<DeviceC> system-view

[DeviceC] vlan 10 to 11

[DeviceC] interface GigabitEthernet 3/0/1

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

[DeviceC-GigabitEthernet3/0/1] port trunk permit vlan 10

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

[DeviceC-GigabitEthernet3/0/1] smart-link flush enable control-vlan 10

[DeviceC-GigabitEthernet3/0/1] undo shutdown

[DeviceC-GigabitEthernet3/0/1] quit

# 配置端口GigabitEthernet 3/0/2为Trunk口，允许VLAN 10、VLAN11流量通过，并使能Flush报文接收。

[DeviceC] interface GigabitEthernet 3/0/2

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

[DeviceC-GigabitEthernet3/0/2] port trunk permit vlan 10 11

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

[DeviceC-GigabitEthernet3/0/2] smart-link flush enable control-vlan 10 11

[DeviceC-GigabitEthernet3/0/2] undo shutdown

[DeviceC-GigabitEthernet3/0/2] quit

# 配置端口GigabitEthernet 3/0/3为Trunk口，允许VLAN 11流量通过，并使能Flush报文接收。

[DeviceC] interface GigabitEthernet 3/0/3

[DeviceC-GigabitEthernet3/0/3] port link-type trunk

[DeviceC-GigabitEthernet3/0/3] port trunk permit vlan 11

[DeviceC-GigabitEthernet3/0/3] undo port trunk permit vlan 1

[DeviceC-GigabitEthernet3/0/3] smart-link flush enable control-vlan 11

[DeviceC-GigabitEthernet3/0/3] undo shutdown

[DeviceC-GigabitEthernet3/0/3] quit

# 创建Monitor Link组1。

[DeviceC] monitor-link group 1

# GigabitEthernet 3/0/2配置为上行接口，GigabitEthernet 3/0/1配置为下行接口。

[DeviceC-mtlk-group1] port GigabitEthernet 3/0/2 uplink

[DeviceC-mtlk-group1] port GigabitEthernet 3/0/1 downlink

# 创建Monitor Link组2。

[DeviceC] monitor-link group 2

# GigabitEthernet 3/0/2配置为上行接口，GigabitEthernet 3/0/3配置为下行接口。

[DeviceC-mtlk-group2] port GigabitEthernet 3/0/2 uplink

[DeviceC-mtlk-group2] port GigabitEthernet 3/0/3 downlink

5.5.4  Device D的配置

# 配置端口GigabitEthernet 3/0/1为Trunk口，允许VLAN 11流量通过，并使能Flush报文接收。

<DeviceD> system-view

[DeviceD] vlan 10 to 11

[DeviceD] interface GigabitEthernet 3/0/1

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

[DeviceD-GigabitEthernet3/0/1] port trunk permit vlan 11

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

[DeviceD-GigabitEthernet3/0/1] smart-link flush enable control-vlan 11

[DeviceD-GigabitEthernet3/0/1] undo shutdown

[DeviceD-GigabitEthernet3/0/1] quit

# 配置端口GigabitEthernet 3/0/2为Trunk口，允许VLAN 10、VLAN11流量通过，并使能Flush报文接收。

[DeviceD] interface GigabitEthernet 3/0/2

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

[DeviceD-GigabitEthernet3/0/2] port trunk permit vlan 10 11

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

[DeviceD-GigabitEthernet3/0/2] smart-link flush enable control-vlan 10 11

[DeviceD-GigabitEthernet3/0/2] undo shutdown

[DeviceD-GigabitEthernet3/0/2] quit

# 配置端口GigabitEthernet 3/0/3为Trunk口，允许VLAN 10流量通过，并使能Flush报文接收。

[DeviceD] interface GigabitEthernet 3/0/3

[DeviceD-GigabitEthernet3/0/3] port link-type trunk

[DeviceD-GigabitEthernet3/0/3] port trunk permit vlan 10

[DeviceD-GigabitEthernet3/0/3] undo port trunk permit vlan 1

[DeviceD-GigabitEthernet3/0/3] smart-link flush enable control-vlan 10

[DeviceD-GigabitEthernet3/0/3] undo shutdown

[DeviceD-GigabitEthernet3/0/3] quit

# 创建Monitor Link组1。

[DeviceD] monitor-link group 1

# GigabitEthernet 3/0/2配置为上行接口，GigabitEthernet 3/0/1配置为下行接口。

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

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

# 创建Monitor Link组2。

[DeviceD] monitor-link group 2

# GigabitEthernet 3/0/2配置为上行接口，GigabitEthernet 3/0/3配置为下行接口。

[DeviceD-mtlk-group2] port GigabitEthernet 3/0/2 uplink

[DeviceD-mtlk-group2] port GigabitEthernet 3/0/3 downlink

5.5.5  Device E的配置

# 配置端口GigabitEthernet 3/0/1、GigabitEthernet 3/0/2、GigabitEthernet 3/0/3为Trunk口，允许VLAN 10、VLAN 11的流量通过；GigabitEthernet 3/0/1、GigabitEthernet 3/0/2使能Flush报文接收。

<DeviceE> system-view

[DeviceE] vlan 10 to 11

[DeviceE] interface GigabitEthernet 3/0/1

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

[DeviceE-GigabitEthernet3/0/1] port trunk permit vlan 10 11

[DeviceE-GigabitEthernet3/0/1] undo port trunk permit vlan 1

[DeviceE-GigabitEthernet3/0/1] smart-link flush enable control-vlan 10 11

[DeviceE-GigabitEthernet3/0/1] undo shutdown

[DeviceE-GigabitEthernet3/0/1] quit

[DeviceE] interface GigabitEthernet 3/0/2

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

[DeviceE-GigabitEthernet3/0/2] port trunk permit vlan 10 11

[DeviceE-GigabitEthernet3/0/2] undo port trunk permit vlan 1

[DeviceE-GigabitEthernet3/0/2] smart-link flush enable control-vlan 10 11

[DeviceE-GigabitEthernet3/0/2] undo shutdown

[DeviceE-GigabitEthernet3/0/2] quit

[DeviceE] interface GigabitEthernet 3/0/3

[DeviceE-GigabitEthernet3/0/3] port link-type trunk

[DeviceE-GigabitEthernet3/0/3] port trunk permit vlan 10 11

[DeviceE-GigabitEthernet3/0/3] undo port trunk permit vlan 1

[DeviceE-GigabitEthernet3/0/3] undo shutdown

[DeviceE-GigabitEthernet3/0/3] quit

5.6  验证配置

(1)     当Device A和Device B正常工作时，查看Smart Link的配置

# 查看Device A上的Smart Link配置。

[DeviceA] display smart-link group all

Smart link group 1 information:

  Device ID       : 0000-fc00-2500

  Preemption mode : ROLE

  Preemption delay: 10(s)

  Control VLAN    : 10

  Protected VLAN  : Reference Instance 1

  Member                  Role      State   Flush-count     Last-flush-time

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

  GE3/0/1                 PRIMARY   ACTIVE  1               19:37:49 2014/12/29

  GE3/0/2                 SECONDARY STANDBY 3               17:43:06 2014/12/29

# 查看Device B上的Smart Link配置。

[DeviceB] display smart-link group all

Smart link group 1 information:

  Device ID       : 0000-fc00-2500

  Preemption mode : ROLE

  Preemption delay: 10(s)

  Control VLAN    : 11

  Protected VLAN  : Reference Instance 2

  Member                  Role      State   Flush-count     Last-flush-time

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

  GE3/0/1                 PRIMARY   ACTIVE  2               16:22:40 2014/12/29

  GE3/0/2                 SECONDARY STANDBY 0               NA

上述信息表示，在Device A设备的Smart Link组1中，Device A的GigabitEthernet 3/0/1是主端口，负责转发VLAN实例1的流量；在Device B设备的Smart Link组1中，Device A的GigabitEthernet 3/0/1是主端口，负责转发VLAN实例2的流量。

(2)     当Device C和Device D正常工作时，查看Monitor Link的配置

# 查看Device C上的Monitor Link配置。

[DeviceC] display monitor-link group all

Monitor link group 1 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 10:07:26 2014/10/23

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     UP

  GE3/0/1                   DOWNLINK   UP

Monitor link group 2 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 10:07:26 2014/10/23

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     UP

  GE3/0/3                   DOWNLINK   UP

# 查看Device D上的Monitor Link配置。

[DeviceD] display monitor-link group all

Monitor link group 1 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 19:49:33 2014/12/29

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     UP

  GE3/0/1                   DOWNLINK   UP

Monitor link group 1 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 19:49:33 2014/12/29

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     UP

  GE3/0/3                   DOWNLINK   UP

上述信息表示，Device A设备的Monitor Link 1和Monitor Link 2中，GigabitEthernet 3/0/2为上行接口； Device B设备的Monitor Link 1和Monitor Link 2中，GigabitEthernet 3/0/2为上行接口。

(3)     当Device A或Device B的GigabitEthernet 3/0/1接口Down时，查看Smart Link的配置

# 查看Device A上的Smart Link配置。

[DeviceA] display smart-link group all

Smart link group 1 information:

  Device ID       : 0000-fc00-2500

  Preemption mode : ROLE

  Preemption delay: 10(s)

  Control VLAN    : 10

  Protected VLAN  : Reference Instance 1

  Member                  Role      State   Flush-count     Last-flush-time

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

  GE3/0/1                 SECONDAR  DOWN    1               NA

  GE3/0/2                 PRIMARY   ACTIVE  3               17:43:06 2014/12/29

# 查看Device B上的Smart Link配置。

[DeviceB] display smart-link group all

Smart link group 1 information:

  Device ID       : 0000-fc00-2500

  Preemption mode : ROLE

  Preemption delay: 10(s)

  Control VLAN    : 11

  Protected VLAN  : Reference Instance 2

  Member                  Role      State   Flush-count     Last-flush-time

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

  GE3/0/1                 SECONDAR  DOWN    1               NA

  GE3/0/2                 PRIMARY   ACTIVE  3               17:43:06 2014/12/29

上述信息表示，Device A的GigabitEthernet 3/0/1接口Down时，在Smart Link组1中， GigabitEthernet 3/0/2成为主端口，负责转发VLAN实例1的流量；Device B的GigabitEthernet 3/0/1接口Down时，在Smart Link组1中， GigabitEthernet 3/0/2成为主端口，负责转发VLAN实例1的流量。

# 通过使用display smart-link flush命令可以查看Device C上收到的Flush报文信息。

[DeviceC] display smart-link flush

 Received flush packets                       : 1

 Receiving interface of the last flush packet : GigabitEthernet3/0/1

 Receiving time of the last flush packet      : 07:57:22 2014/10/23

 Device ID of the last flush packet           : 0000-fc00-2500

 Control VLAN of the last flush packet        : 10

# 通过使用display smart-link flush命令可以查看Device D上收到的Flush报文信息。

[DeviceD] display smart-link flush

 Received flush packets                       : 1

 Receiving interface of the last flush packet : GigabitEthernet3/0/1

 Receiving time of the last flush packet      : 07:57:22 2014/10/23

 Device ID of the last flush packet           : 0000-fc00-2500

 Control VLAN of the last flush packet        : 11

(4)     当Device C或Device D的上行接口Down时，查看Monitor Link的配置

# 查看Device C上的Monitor Link配置。

[DeviceC] display monitor-link group all

Monitor link group 1 information:

  Group status     : DOWN

  Downlink up-delay: 0(s)

  Last-up-time     : 10:07:26 2014/10/23

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     DOWN

  GE3/0/1                   DOWNLINK   DOWN

Monitor link group 2 information:

  Group status     : DOWN

  Downlink up-delay: 0(s)

  Last-up-time     : 10:07:26 2007/10/23

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     DOWN

  GE3/0/3                   DOWNLINK   DOWN

# 查看Device D上的Monitor Link配置。

[DeviceD] display monitor-link group all

Monitor link group 1 information:

  Group status     : DOWN

  Downlink up-delay: 0(s)

  Last-up-time     : 19:49:33 2014/12/29

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     DOWN

  GE3/0/1                   DOWNLINK   DOWN

Monitor link group 1 information:

  Group status     : UP

  Downlink up-delay: 0(s)

  Last-up-time     : 19:49:33 2014/12/29

  Last-down-time   : -

  Member                    Role       Status

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

  GE3/0/2                   UPLINK     DOWN

  GE3/0/3                   DOWNLINK   DOWN

上述信息表示，Device A或Device B设备的GigabitEthernet 3/0/2Down时，Monitor Link 1和Monitor Link 2的状态变为Down，下行设备会将流量切换到另一条链路进行转发。

5.7  配置文件

·     Device A：

#

vlan 1

#

vlan 10

#

stp region-configuration

 instance 1 vlan 10

active region-configuration

#

smart-link group 1

 preemption mode role

 flush enable control-vlan 10

 protected-vlan reference-instance 1

#

interface GigabitEthernet3/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10

 undo stp enable

 port smart-link group 1 primary

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10

 undo stp enable

 port smart-link group 1 secondary

#

interface GigabitEthernet3/0/3

 port link-mode bridge

 port access vlan 10

#

·     Device B：

#

vlan 1

#

vlan 11

#

stp region-configuration

 instance 1 vlan 11

active region-configuration

#

smart-link group 1

 preemption mode role

 flush enable control-vlan 11

 protected-vlan reference-instance 1

#

interface GigabitEthernet3/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 11

 undo stp enable

 port smart-link group 1 primary

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 11

 undo stp enable

 port smart-link group 1 secondary

#

interface GigabitEthernet3/0/3

 port link-mode bridge

 port access vlan 11

#

·     Device C：

#

vlan 1

#

vlan 10 to 11

#

monitor-link group 1

monitor-link group 2

#

interface GigabitEthernet3/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10

 smart-link flush enable control-vlan 10

 port monitor-link group 1 downlink

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10 to 11

 smart-link flush enable control-vlan 10 to 11

 port monitor-link group 1 uplink

port monitor-link group 2 uplink

#

interface GigabitEthernet3/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 11

 smart-link flush enable control-vlan 11

 port monitor-link group 2 downlink

#

·     Device D：

#

vlan 1

#

vlan 10 to 11

#

monitor-link group 1

monitor-link group 2

#

interface GigabitEthernet3/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 11

 smart-link flush enable control-vlan 11

 port monitor-link group 1 downlink

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10 to 11

 smart-link flush enable control-vlan 10 to 11

 port monitor-link group 1 uplink

port monitor-link group 2 uplink

#

interface GigabitEthernet3/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10

 smart-link flush enable control-vlan 10

 port monitor-link group 2 downlink

#

·     Device E：

#

vlan 1

#

vlan 10 to 11

#

interface GigabitEthernet3/0/1

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10 to 11

 smart-link flush enable control-vlan 10 to 11

#

interface GigabitEthernet3/0/2

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10 to 11

 smart-link flush enable control-vlan 10 to 11

#

interface GigabitEthernet3/0/3

 port link-mode bridge

 port link-type trunk

 undo port trunk permit vlan 1

 port trunk permit vlan 10 to 11