华为数通---配置Smart Link主备备份示例

定义

Smart Link，又叫做备份链路。一个Smart Link由两个接口组成，其中一个接口作为另一个的备份。Smart Link常用于双上行组网，提供可靠高效的备份和快速的切换机制。??

目的?

下游设备连接到上游设备，当使用单上行方式时，若出现单点故障，会造成业务中断。若采用双上行方式，将一台下游设备同时连接到两台上游设备，可降低单点故障对网络的影响，提高了可靠性。?

组网需求?

如下图所示，为了保证网络的可靠性，用户侧网络采用双上行方式组网。用户希望能够破除网络环路，实现主备链路冗余备份和快速收敛。

?

配置思路?

采用如下的思路配置Smart Link功能：

• 创建VLAN，并配置接口允许相应VLAN通过。

• 在SwitchA上创建Smart Link备份组，并指定端口角色。

• 在SwitchA上使能回切功能，使得故障恢复后，流量切换到相对稳定的原主链路上。

• 在SwitchA上使能发送Flush报文功能。

• 在SwitchB、SwitchC和SwitchD三台设备对应端口上使能Flush报文接收功能。

• 在SwitchA上使能Smart Link组功能。

操作步骤?

• 配置VLAN信息

# 在SwitchA上创建VLAN，并配置接口允许相应VLAN通过。SwitchB、SwitchC和SwitchD的配置与SwitchA类似，详见配置文件。

<Huawei>system-view 
[Huawei]sysname SwitchA
[SwitchA]vlan batch 10 to 30
[SwitchA]interface GigabitEthernet 0/0/1
[SwitchA-GigabitEthernet0/0/1]port link-type trunk 
[SwitchA-GigabitEthernet0/0/1]port trunk allow-pass vlan 10 to 30
[SwitchA-GigabitEthernet0/0/1]quit
[SwitchA]interface GigabitEthernet 0/0/2
[SwitchA-GigabitEthernet0/0/2]port link-type trunk 
[SwitchA-GigabitEthernet0/0/2]port trunk allow-pass vlan 10 to 30
[SwitchA-GigabitEthernet0/0/2]quit

• 在SwitchA上创建Smart Link备份组，并指定端口角色

# 配置SwitchA

[SwitchA]interface GigabitEthernet 0/0/1
[SwitchA-GigabitEthernet0/0/1]stp disable 
[SwitchA-GigabitEthernet0/0/1]quit
[SwitchA]interface GigabitEthernet 0/0/2
[SwitchA-GigabitEthernet0/0/2]stp disable 
[SwitchA-GigabitEthernet0/0/2]quit
[SwitchA]smart-link group 1
[SwitchA-smlk-group1]port GigabitEthernet 0/0/1 master 	
[SwitchA-smlk-group1]port GigabitEthernet 0/0/2 slave 

• 使能回切功能并设置回切时间

# 配置SwitchA。

[SwitchA-smlk-group1]restore enable 
[SwitchA-smlk-group1]timer wtr 30

• 使能发送Flush报文功能

# 配置SwitchA，并指定发送Flush报文的密码为SHA加密方式。

[SwitchA-smlk-group1]flush send control-vlan 10 password simple huawei@123

• 使能接收Flush报文功能

# 配置SwitchB，并指定接收Flush报文的密码为SHA加密方式。

[SwitchB]interface GigabitEthernet 0/0/1
[SwitchB-GigabitEthernet0/0/1]smart-link flush receive control-vlan 10 password 
simple huawei@123	
[SwitchB-GigabitEthernet0/0/1]stp disable 
[SwitchB-GigabitEthernet0/0/1]quit
[SwitchB]interface GigabitEthernet 0/0/2
[SwitchB-GigabitEthernet0/0/2]smart-link flush receive control-vlan 10 password 
simple huawei@123
[SwitchB-GigabitEthernet0/0/2]stp disable
[SwitchB-GigabitEthernet0/0/2]quit

# 配置SwitchC，并指定接收Flush报文的密码为SHA加密方式。

[SwitchC]interface GigabitEthernet 0/0/1
[SwitchC-GigabitEthernet0/0/1]smart-link flush receive control-vlan 10 password 
simple huawei@123	
[SwitchC-GigabitEthernet0/0/1]stp disable 
[SwitchC-GigabitEthernet0/0/1]quit
[SwitchC]interface GigabitEthernet 0/0/2
[SwitchC-GigabitEthernet0/0/2]smart-link flush receive control-vlan 10 password 
simple huawei@123
[SwitchC-GigabitEthernet0/0/2]stp disable 
[SwitchC-GigabitEthernet0/0/2]quit

# 配置SwitchD，并指定接收Flush报文的密码为SHA加密方式。

[Huawei]interface GigabitEthernet 0/0/1
[Huawei-GigabitEthernet0/0/1]smart-link flush receive control-vlan 10 password s
imple huawei@123
[Huawei-GigabitEthernet0/0/1]stp disable 
[Huawei-GigabitEthernet0/0/1]quit
[Huawei]interface GigabitEthernet 0/0/2
[Huawei-GigabitEthernet0/0/2]smart-link flush receive control-vlan 10 password s
imple huawei@123
[Huawei-GigabitEthernet0/0/2]stp disable 
[Huawei-GigabitEthernet0/0/2]quit

• 在SwitchA使能Smart Link组功能

[SwitchA-smlk-group1]smart-link enable 
[SwitchA-smlk-group1]quit

• 验证配置结果

# 使用display smart-link group命令查看SwitchA上的Smart Link组信息。如果显示如下信息，则表示配置成功。

1. Smart Link组功能已经使能
2. 回切时间为30秒
3. 控制VLAN编号为10
4. 接口GE0/0/1为主接口且处于Active状态，接口GE0/0/2为从接口且处于Inactive。

[SwitchA]display smart-link group 1
Smart Link group 1 information :
  Smart Link group was enabled
  Wtr-time is: 30 sec.
  There is no Load-Balance
  There is no protected-vlan reference-instance
  DeviceID: 4c1f-ccd4-08f7  Control-vlan ID: 10
  Member                  Role   State    Flush Count Last-Flush-Time
  ----------------------------------------------------------------------

  GigabitEthernet0/0/1    Master Active   1           2023/12/08 16:08:26 UTC-08
:00 
  GigabitEthernet0/0/2    Slave  Inactive 0           0000/00/00 00:00:00 UTC+00
:00 

# 使用shutdown命令关闭接口GE0/0/1，可以看到接口GE0/0/1已经处于Inactive状态，接口GE0/0/2为Active状态。

[SwitchA]interface GigabitEthernet 0/0/1
[SwitchA-GigabitEthernet0/0/1]shutdown
[SwitchA-GigabitEthernet0/0/1]display smart-link group 1
Smart Link group 1 information :
  Smart Link group was enabled
  Wtr-time is: 30 sec.
  There is no Load-Balance
  There is no protected-vlan reference-instance
  DeviceID: 4c1f-ccd4-08f7  Control-vlan ID: 10
  Member                  Role   State    Flush Count Last-Flush-Time
  ----------------------------------------------------------------------

  GigabitEthernet0/0/1    Master Inactive 1           2023/12/08 16:08:26 UTC-08
:00 
  GigabitEthernet0/0/2    Slave  Active   0           0000/00/00 00:00:00 UTC+00
:00 

# 使用undo shutdown命令开启接口GE0/0/1。

[SwitchA-GigabitEthernet0/0/1]undo shutdown

# 等待30秒后，可以看到接口GE0/0/1处于Active状态，接口GE0/0/2为Inactive状态。

[SwitchA]display smart-link group 1
Smart Link group 1 information :
  Smart Link group was enabled
  Wtr-time is: 30 sec.
  There is no Load-Balance
  There is no protected-vlan reference-instance
  DeviceID: 4c1f-ccd4-08f7  Control-vlan ID: 10
  Member                  Role   State    Flush Count Last-Flush-Time
  ----------------------------------------------------------------------

  GigabitEthernet0/0/1    Master Active   2           2023/12/08 16:12:21 UTC-08
:00 
  GigabitEthernet0/0/2    Slave  Inactive 1           2023/12/08 16:11:27 UTC-08
:00 

配置文件?

• SwitchA的配置文件

#
sysname SwitchA
#
vlan batch 10 to 30
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
#
smart-link group 1
 restore enable
 smart-link enable
 port GigabitEthernet0/0/1 master
 port GigabitEthernet0/0/2 slave
 timer wtr 30
 flush send control-vlan 10 password simple huawei@123
#
return

• SwitchB的配置文件

#
sysname SwitchB
#
vlan batch 10 to 30
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
 smart-link flush receive control-vlan 10 password simple huawei@123
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
 smart-link flush receive control-vlan 10 password simple huawei@123
#
return

• SwitchC的配置文件

#
sysname SwitchC
#
vlan batch 10 to 30
#
interface GigabitEthernet0/0/1
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
 smart-link flush receive control-vlan 10 password simple huawei@123
#
interface GigabitEthernet0/0/2
 port link-type trunk
 port trunk allow-pass vlan 10 to 30
 stp disable
 smart-link flush receive control-vlan 10 password simple huawei@123
#
return