目  录

1 Smart Link与CFD联动典型配置指导

1.1 Smart Link与CFD联动简介

1.2 单Smart Link组与CFD联动典型配置指导

1.2.1 适用产品、版本

1.2.2 组网需求

1.2.3 配置思路

1.2.4 配置过程和解释

1.2.5 完整配置

1.2.6 配置注意事项

1.3 多Smart Link组与CFD联动典型配置指导

1.3.1 适用产品、版本

1.3.2 组网需求

1.3.3 配置思路

1.3.4 配置过程和解释

1.3.5 完整配置

1.3.6 配置注意事项

 

1 Smart Link与CFD联动典型配置指导

1.1  Smart Link与CFD联动简介

当网络的中间传输设备或传输链路发生故障（如光纤链路发生单通、错纤、丢包等故障）以及故障恢复时，Smart Link本身无法感知。而通过与CFD（Connectivity Fault Detection，连通错误检测）协议的连续性检测功能联动，则可以实现在检测到故障发生或恢复时通知Smart Link进行链路切换。

1.2  单Smart Link组与CFD联动典型配置指导

1.2.1  适用产品、版本

表1-1 配置适用的产品与软件版本关系

产品	软件版本
S7500E系列以太网交换机	Release 6600系列，Release 6610系列
S7600系列以太网交换机	Release 6600系列，Release 6610系列
S5800&S5820X系列以太网交换机	Release 1211
CE3000-32F以太网交换机	Release 1211

 

1.2.2  组网需求

Smart Link双上行组网方式，可以最大限度地避免单上行方式中的单点故障问题，从而可大大提高网络可靠性。如图1-1所示：

l              设备Device C连接VLAN1～VLAN10的用户网络，且通过Smart Link将用户网络的流量上行转发到设备Device A。

l              在正常情况下用户网络的流量经Device C上Smart Link 的主端口进行转发；

l              当Smart Link的主端口与Device A间的链路发生故障时，Smart Link的从端口将快速切换到转发状态；

l              当Smart Link的主端口与Device A间的链路恢复正常时，Smart Link的主端口将切换到转发状态。

图1-1 Smart Link与CFD联动组网图

 

1.2.3  配置思路

l              让Smart Link能够感知网络的中间传输设备或传输链路发生故障，可以通过Smart Link与CFD CC联动方式实现。相对于使用Monitor Link监视Smart Link上行链路的实现方式，Smart Link与CFD CC联动方式不会强制改变中间设备上端口的down/up状态，若使用CFD LT功能还可以确认故障发生的位置。

l              当Smart Link的主端口与Device A间的链路恢复正常时，要求Smart Link的主端口将快速切换到转发状态，可通过在Smart Link内配置角色抢占机制实现。

1.2.4  配置过程和解释

1. 配置Smart Link

(1)        配置Device C

# 创建VLAN 1～10。

<DeviceC> system-view

[DeviceC] vlan 1 to 10

# 在端口GigabitEthernet1/0/1和GigabitEthernet1/0/2上分别关闭STP功能，并将端口配置为Trunk端口且允许VLAN 1～10通过。

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] undo stp enable

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

[DeviceC-GigabitEthernet1/0/1] port trunk permit vlan 1 to 10

[DeviceC-GigabitEthernet1/0/1] quit

[DeviceC] interface gigabitethernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] undo stp enable

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

[DeviceC-GigabitEthernet1/0/2] port trunk permit vlan 1 to 10

[DeviceC-GigabitEthernet1/0/2] quit

# 创建Smart Link组1，并配置其保护VLAN为MSTP实例0所映射的VLAN。

[DeviceC] smart-link group 1

[DeviceC-smlk-group1] protected-vlan reference-instance 0

# 配置Smart Link组1的主端口为GigabitEthernet1/0/1，从端口为GigabitEthernet1/0/2。

[DeviceC-smlk-group1] port gigabitethernet 1/0/1 master

[DeviceC-smlk-group1] port gigabitethernet 1/0/2 slave

# 在Smart Link组1中配置抢占模式为角色抢占模式；使能发送Flush报文的功能，并指定发送Flush报文的控制VLAN为VLAN 10。

[DeviceC-smlk-group1] preemption mode role

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

[DeviceC-smlk-group1] quit

(2)        配置Device B

# 创建VLAN 1～10。

<DeviceB> system-view

[DeviceB] vlan 1 to 10

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～10通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10。

[DeviceB] interface gigabitethernet 1/0/1

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

[DeviceB-GigabitEthernet1/0/1] port trunk permit vlan 1 to 10

[DeviceB-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10

[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 1 to 10

[DeviceB-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10

[DeviceB-GigabitEthernet1/0/2] quit

(3)        配置Device D

# 创建VLAN 1～10。

<DeviceD> system-view

[DeviceD] vlan 1 to 10

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～10通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10。

[DeviceD] interface gigabitethernet 1/0/1

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

[DeviceD-GigabitEthernet1/0/1] port trunk permit vlan 1 to 10

[DeviceD-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10

[DeviceD-GigabitEthernet1/0/1] quit

[DeviceD] interface gigabitethernet 1/0/2

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

[DeviceD-GigabitEthernet1/0/2] port trunk permit vlan 1 to 10

[DeviceD-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10

[DeviceD-GigabitEthernet1/0/2] quit

(4)        配置Device A

# 创建VLAN 1～10。

<DeviceA> system-view

[DeviceA] vlan 1 to 10

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～10通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10。

[DeviceA] interface gigabitethernet 1/0/1

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

[DeviceA-GigabitEthernet1/0/1] port trunk permit vlan 1 to 10

[DeviceA-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10

[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 1 to 10

[DeviceA-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10

[DeviceA-GigabitEthernet1/0/2] quit

2. 配置CFD

(1)        配置Device C

# 使能CFD功能。

<DeviceC> system-view

[DeviceC] cfd enable

# 配置服务实例1（关联VLAN 10）。

[DeviceC] cfd md MD level 5

[DeviceC] cfd ma MA_1 md MD vlan 10

[DeviceC] cfd service-instance 1 md MD ma MA_1

# 配置维护端点。

[DeviceC] cfd meplist 1001 1002 service-instance 1

[DeviceC] interface GigabitEthernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] cfd mep 1001 service-instance 1 outbound

[DeviceC-GigabitEthernet1/0/1] cfd mep service-instance 1 mep 1001 enable

# 启用维护端点的CC功能

[DeviceC-GigabitEthernet1/0/1] cfd cc service-instance 1 mep 1001 enable

[DeviceC-GigabitEthernet1/0/1] quit

(2)        配置Device A

# 使能CFD功能。

<DeviceA> system-view

[DeviceA] cfd enable

# 配置服务实例1（关联VLAN 10）。

[DeviceA] cfd md MD level 5

[DeviceA] cfd ma MA_1 md MD vlan 10

[DeviceA] cfd service-instance 1 md MD ma MA_1

# 配置维护端点。

[DeviceA] cfd meplist 1001 1002 service-instance 1

[DeviceA] interface GigabitEthernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] cfd mep 1002 service-instance 1 outbound

[DeviceA-GigabitEthernet1/0/1] cfd mep service-instance 1 mep 1002 enable

# 启用维护端点的CC功能

[DeviceA] interface GigabitEthernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] cfd cc service-instance 1 mep 1002 enable

[DeviceA-GigabitEthernet1/0/1] quit

3. 配置Smart Link与CFD CC进行联动

# 在Device C上配置Smart Link与CFD CC进行联动

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] port smart-link group 1 track cfd cc

[DeviceC-GigabitEthernet1/0/1] quit

4. 检验配置效果

对Device B上的端口GigabitEthernet1/0/1进行shutdown操作后，使用display smart-link group命令查看Smart Link组的信息：

[DeviceC] display smart-link group all

 Smart link group 1 information:

 Device ID: 0023-895f-954f

 Preemption mode: ROLE

 Preemption delay: 1(s)

 Control VLAN: 10

 Protected VLAN: Reference Instance 0

 Member                     Role    State    Flush-count Last-flush-time

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

 GigabitEthernet1/0/1       MASTER  DOWN     5           14:32:20 2009/12/11

 GigabitEthernet1/0/2       SLAVE   ACTIVE   4           14:32:56 2009/12/11

 

由显示结果可知，当对Device B上的端口GigabitEthernet1/0/1进行shutdown操作后，由于Smart Link与CFD CC进行了联动，所以能够感知上行链路发生故障，进而触发双上行链路间的切换。

1.2.5  完整配置

l              Device A上的配置

#

 cfd enable

 cfd md MD level 5

 cfd ma MA_1 md MD vlan 10

 cfd service-instance 1 md MD ma MA_1

 cfd meplist 1001 to 1002 service-instance 1

#

vlan 1

#

vlan 2 to 10

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

 cfd mep 1002 service-instance 1 outbound

 cfd mep service-instance 1 mep 1002 enable

 cfd cc service-instance 1 mep 1002 enable

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

#

l              Device B上的配置

#

vlan 1

#

vlan 2 to 10

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

#

l              Device C上的配置

#

 cfd enable

 cfd md MD level 5

 cfd ma MA_1 md MD vlan 10

 cfd service-instance 1 md MD ma MA_1

 cfd meplist 1001 to 1002 service-instance 1

#

vlan 1

#

vlan 2 to 10

#

smart-link group 1

 preemption mode role

 protected-vlan reference-instance 0

 flush enable control-vlan 10

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 10

 stp disable

 port smart-link group 1 master

 port smart-link group 1 track cfd cc

 cfd mep 1001 service-instance 1 outbound

 cfd mep service-instance 1 mep 1001 enable

 cfd cc service-instance 1 mep 1001 enable

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 10

 stp disable

 port smart-link group 1 slave

#

l              Device D上的配置

#

vlan 1

#

vlan 2 to 10

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 10

 smart-link flush enable control-vlan 10

#

1.2.6  配置注意事项

l              在配置CFD过程中，必须按照创建维护域、创建维护集、创建服务实例的顺序依次进行。

l              在配置Smart Link组的成员端口与CFD CC机制联动时，该端口所在Smart Link组的控制VLAN必须与CFD CC的检测VLAN相一致。

l              Smart Link与CFD CC联动功能不适用于Smart Link组的成员端口是聚合接口的组网环境。

l              有关CFD和Smart Link配置的具体注意事项，请参见“连通错误检测典型配置指导”和“Smart Link典型配置指导”。

1.3  多Smart Link组与CFD联动典型配置指导

1.3.1  适用产品、版本

表1-2 配置适用的产品与软件版本关系

产品	软件版本
S7500E系列以太网交换机	Release 6600系列，Release 6610系列
S7600系列以太网交换机	Release 6600系列，Release 6610系列
S5800&S5820X系列以太网交换机	Release 1211
CE3000-32F以太网交换机	Release 1211

 

1.3.2  组网需求

在同一个环网中，可能同时存在多个VLAN的数据流量，为了实现流量的负载分担，即使不同的VLAN流量沿不同的路径进行转发，可采用多Smart Link组。如图1-2所示，设备Device C通过多Smart Link组将VLAN 1～10和VLAN 11～20的流量分别沿不同的路径双上行到设备Device A。现要求：

l              在正常情况下VLAN 1～10的流量经Device C上Smart Link组1的主端口进行转发，VLAN 11～20的流量经Device C上Smart Link组2的主端口进行转发；

l              当各Smart Link组的主端口与Device A间的链路发生故障时，各Smart Link组的从端口将快速切换到转发状态；

l              当各Smart Link组的主端口与Device A间的链路恢复正常时，各Smart Link组的主端口将切换到转发状态。实现流量的负载分担和上行链路的灵活备份。

图1-2 Smart Link与CFD联动组网图

 

1.3.3  配置思路

l              让Smart Link能够感知网络的中间传输设备或传输链路发生故障，可以通过Smart Link与CFD CC联动方式实现。相对于使用Monitor Link监视Smart Link上行链路的实现方式，Smart Link与CFD CC联动方式不会强制改变中间设备上端口的down/up状态，若使用CFD LT功能还可以确认故障发生的位置。

l              当各Smart Link组的主端口与Device A间的链路恢复正常时，要求Smart Link组的主端口将快速切换到转发状态，可通过在Smart Link组内配置角色抢占机制实现。

1.3.4  配置过程和解释

1. 配置Smart Link

(1)        配置Device C

# 创建VLAN 1～20，分别将VLAN 1～10映射到MSTP实例0、VLAN 11～20映射到MSTP实例1上，并激活MST域的配置。

<DeviceC> system-view

[DeviceC] vlan 1 to 20

[DeviceC] stp region-configuration

[DeviceC-mst-region] instance 0 vlan 1 to 10

[DeviceC-mst-region] instance 1 vlan 11 to 20

[DeviceC-mst-region] active region-configuration

[DeviceC-mst-region] quit

# 在端口GigabitEthernet1/0/1和GigabitEthernet1/0/2上分别关闭STP功能，并将端口配置为Trunk端口且允许VLAN 1～20通过。

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] undo stp enable

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

[DeviceC-GigabitEthernet1/0/1] port trunk permit vlan 1 to 20

[DeviceC-GigabitEthernet1/0/1] quit

[DeviceC] interface gigabitethernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] undo stp enable

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

[DeviceC-GigabitEthernet1/0/2] port trunk permit vlan 1 to 20

[DeviceC-GigabitEthernet1/0/2] quit

# 创建Smart Link组1，并配置其保护VLAN为MSTP实例0所映射的VLAN。

[DeviceC] smart-link group 1

[DeviceC-smlk-group1] protected-vlan reference-instance 0

# 配置Smart Link组1的主端口为GigabitEthernet1/0/1，从端口为GigabitEthernet1/0/2。

[DeviceC-smlk-group1] port gigabitethernet 1/0/1 master

[DeviceC-smlk-group1] port gigabitethernet 1/0/2 slave

# 在Smart Link组1中配置抢占模式为角色抢占模式；使能发送Flush报文的功能，并指定发送Flush报文的控制VLAN为VLAN 10。

[DeviceC-smlk-group1] preemption mode role

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

[DeviceC-smlk-group1] quit

# 创建Smart Link组2，并配置其保护VLAN为MSTP实例1所映射的VLAN。

[DeviceC] smart-link group 2

[DeviceC-smlk-group2] protected-vlan reference-instance 1

# 配置Smart Link组2的主端口为GigabitEthernet1/0/2，从端口为GigabitEthernet1/0/1。

[DeviceC-smlk-group2] port gigabitethernet 1/0/2 master

[DeviceC-smlk-group2] port gigabitethernet 1/0/1 slave

# 在Smart Link组2中配置抢占模式为角色抢占模式；使能发送Flush报文的功能，并指定发送Flush报文的控制VLAN为VLAN 11。

[DeviceC-smlk-group2] preemption mode role

[DeviceC-smlk-group2] flush enable control-vlan 11

[DeviceC-smlk-group2] quit

(2)        配置Device B

# 创建VLAN 1～20。

<DeviceB> system-view

[DeviceB] vlan 1 to 20

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～20通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10和11。

[DeviceB] interface gigabitethernet 1/0/1

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

[DeviceB-GigabitEthernet1/0/1] port trunk permit vlan 1 to 20

[DeviceB-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10 11

[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 1 to 20

[DeviceB-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10 11

[DeviceB-GigabitEthernet1/0/2] quit

(3)        配置Device D

# 创建VLAN 1～20。

<DeviceD> system-view

[DeviceD] vlan 1 to 20

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～20通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10和11。

[DeviceD] interface gigabitethernet 1/0/1

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

[DeviceD-GigabitEthernet1/0/1] port trunk permit vlan 1 to 20

[DeviceD-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10 11

[DeviceD-GigabitEthernet1/0/1] quit

[DeviceD] interface gigabitethernet 1/0/2

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

[DeviceD-GigabitEthernet1/0/2] port trunk permit vlan 1 to 20

[DeviceD-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10 11

[DeviceD-GigabitEthernet1/0/2] quit

(4)        配置Device A

# 创建VLAN 1～20。

<DeviceA> system-view

[DeviceA] vlan 1 to 20

# 分别将端口GigabitEthernet1/0/1和GigabitEthernet1/0/2配置为Trunk端口且允许VLAN 1～20通过，在这些端口上使能接收Flush报文的功能，并指定接收Flush报文的控制VLAN为VLAN 10和11。

[DeviceA] interface gigabitethernet 1/0/1

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

[DeviceA-GigabitEthernet1/0/1] port trunk permit vlan 1 to 20

[DeviceA-GigabitEthernet1/0/1] smart-link flush enable control-vlan 10 11

[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 1 to 20

[DeviceA-GigabitEthernet1/0/2] smart-link flush enable control-vlan 10 11

[DeviceA-GigabitEthernet1/0/2] quit

2. 配置CFD

(1)        配置Device C

# 使能CFD功能。

<DeviceC> system-view

[DeviceC] cfd enable

# 配置服务实例1（关联VLAN 10）和服务实例2（关联VLAN 11）。

[DeviceC] cfd md MD level 5

[DeviceC] cfd ma MA_1 md MD vlan 10

[DeviceC] cfd service-instance 1 md MD ma MA_1

[DeviceC] cfd ma MA_2 md MD vlan 11

[DeviceC] cfd service-instance 2 md MD ma MA_2

# 配置维护端点。

[DeviceC] cfd meplist 1001 1002 service-instance 1

[DeviceC] cfd meplist 2001 2002 service-instance 2

[DeviceC] interface GigabitEthernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] cfd mep 1001 service-instance 1 outbound

[DeviceC-GigabitEthernet1/0/1] cfd mep service-instance 1 mep 1001 enable

[DeviceC-GigabitEthernet1/0/1] interface GigabitEthernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] cfd mep 2001 service-instance 2 outbound

[DeviceC-GigabitEthernet1/0/2] cfd mep service-instance 2 mep 2001 enable

# 启用维护端点的CC功能

[DeviceC-GigabitEthernet1/0/1] cfd cc service-instance 1 mep 1001 enable

[DeviceC-GigabitEthernet1/0/1] interface GigabitEthernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] cfd cc service-instance 2 mep 2001 enable

[DeviceC-GigabitEthernet1/0/2] quit

(2)        配置Device A

# 使能CFD功能。

<DeviceA> system-view

[DeviceA] cfd enable

# 配置服务实例1（关联VLAN 10）和服务实例2（关联VLAN 11）。

[DeviceA] cfd md MD level 5

[DeviceA] cfd ma MA_1 md MD vlan 10

[DeviceA] cfd service-instance 1 md MD ma MA_1

[DeviceA] cfd ma MA_2 md MD vlan 11

[DeviceA] cfd service-instance 2 md MD ma MA_2

# 配置维护端点。

[DeviceA] cfd meplist 1001 1002 service-instance 1

[DeviceA] cfd meplist 2001 2002 service-instance 2

[DeviceA] interface GigabitEthernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] cfd mep 1002 service-instance 1 outbound

[DeviceA-GigabitEthernet1/0/1] cfd mep service-instance 1 mep 1002 enable

[DeviceA-GigabitEthernet1/0/1] interface GigabitEthernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] cfd mep 2002 service-instance 2 outbound

[DeviceA-GigabitEthernet1/0/2] cfd mep service-instance 2 mep 2002 enable

# 启用维护端点的CC功能

[DeviceA] interface GigabitEthernet 1/0/1

[DeviceA-GigabitEthernet1/0/1] cfd cc service-instance 1 mep 1002 enable

[DeviceA-GigabitEthernet1/0/1] interface GigabitEthernet 1/0/2

[DeviceA-GigabitEthernet1/0/2] cfd cc service-instance 2 mep 2002 enable

[DeviceA-GigabitEthernet1/0/2] quit

3. 配置Smart Link与CFD CC进行联动

# 在Device C上配置Smart Link与CFD CC进行联动

[DeviceC] interface gigabitethernet 1/0/1

[DeviceC-GigabitEthernet1/0/1] port smart-link group 1 track cfd cc

[DeviceC-GigabitEthernet1/0/1] quit

[DeviceC] interface gigabitethernet 1/0/2

[DeviceC-GigabitEthernet1/0/2] port smart-link group 2 track cfd cc

4. 检验配置效果

对Device B上的端口GigabitEthernet1/0/1进行shutdown操作后，使用display smart-link group命令查看Device C上Smart Link组的信息：

[DeviceC] display smart-link group all

 Smart link group 1 information:

 Device ID: 0023-895f-954f

 Preemption mode: ROLE

 Preemption delay: 1(s)

 Control VLAN: 10

 Protected VLAN: Reference Instance 0

 Member                     Role    State    Flush-count Last-flush-time

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

 GigabitEthernet1/0/1       MASTER  DOWN     5           14:32:20 2009/12/11

 GigabitEthernet1/0/2       SLAVE   ACTIVE   4           14:32:56 2009/12/11

 

 Smart link group 2 information:

 Device ID: 0023-895f-954f

 Preemption mode: ROLE

 Preemption delay: 1(s)

 Control VLAN: 11

 Protected VLAN: Reference Instance 1

 Member                     Role    State    Flush-count Last-flush-time

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

 GigabitEthernet1/0/2       MASTER  ACTIVE   5           14:32:20 2009/12/11

 GigabitEthernet1/0/1       SLAVE   STANDBY  4           14:31:40 2009/12/11

由显示结果可知，当对Device B上的端口GigabitEthernet1/0/1进行shutdown操作后，由于Smart Link与CFD CC进行了联动，所以能够感知上行链路发生故障，进而触发双上行链路间的切换。

1.3.5  完整配置

l              Device A上的配置

#

 cfd enable

 cfd md MD level 5

 cfd ma MA_1 md MD vlan 10

 cfd service-instance 1 md MD ma MA_1

 cfd meplist 1001 to 1002 service-instance 1

 cfd ma MA_2 md MD vlan 11

 cfd service-instance 2 md MD ma MA_2

 cfd meplist 2001 to 2002 service-instance 2

#

vlan 1

#

vlan 2 to 20

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

 cfd mep 1002 service-instance 1 outbound

 cfd mep service-instance 1 mep 1002 enable

 cfd cc service-instance 1 mep 1002 enable

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

 cfd mep 2002 service-instance 2 outbound

 cfd mep service-instance 2 mep 2002 enable

 cfd cc service-instance 2 mep 2002 enable

#

l              Device B上的配置

#

vlan 1

#

vlan 2 to 20

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

#

l              Device C上的配置

#

 cfd enable

 cfd md MD level 5

 cfd ma MA_1 md MD vlan 10

 cfd service-instance 1 md MD ma MA_1

 cfd meplist 1001 to 1002 service-instance 1

 cfd ma MA_2 md MD vlan 11

 cfd service-instance 2 md MD ma MA_2

 cfd meplist 2001 to 2002 service-instance 2

#

vlan 1

#

vlan 2 to 20

#

stp region-configuration

 instance 1 vlan 11 to 20

 active region-configuration

#

smart-link group 1

 preemption mode role

 protected-vlan reference-instance 0

 flush enable control-vlan 10

smart-link group 2

 preemption mode role

 protected-vlan reference-instance 1

 flush enable control-vlan 11

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 20

 stp disable

 port smart-link group 1 master

 port smart-link group 1 track cfd cc

 port smart-link group 2 slave

 cfd mep 1001 service-instance 1 outbound

 cfd mep service-instance 1 mep 1001 enable

 cfd cc service-instance 1 mep 1001 enable

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 20

 stp disable

 port smart-link group 1 slave

 port smart-link group 2 master

 port smart-link group 2 track cfd cc

 cfd mep 2001 service-instance 2 outbound

 cfd mep service-instance 2 mep 2001 enable

 cfd cc service-instance 2 mep 2001 enable

#

l              Device D上的配置

#

vlan 1

#

vlan 2 to 20

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan 1 to 20

 smart-link flush enable control-vlan 10 11

#

1.3.6  配置注意事项

l              在配置CFD过程中，必须按照创建维护域、创建维护集、创建服务实例的顺序依次进行。

l              在配置Smart Link组的成员端口与CFD CC机制联动时，该端口所在Smart Link组的控制VLAN必须与CFD中维护集所服务的VLAN相一致。

l              Smart Link与CFD CC联动功能不适用于Smart Link组的成员端口是聚合接口的组网环境。

l              有关CFD和Smart Link配置的具体注意事项，请参见“连通错误检测典型配置指导”和“Smart Link典型配置指导”。