配置策略路由（基于IP地址）示例

组网需求

如图13-1所示，汇聚层Switch做三层转发设备，接入层设备LSW做用户网关，接入层LSW和汇聚层Switch之间路由可达。汇聚层Switch通过两条链路连接到两个核心路由器上，一条是低速链路，网关为10.1.20.1/24；另外一条是高速链路，网关为10.1.30.1/24。

公司希望汇聚层Switch上送到核心层设备的报文中，源IP地址为192.168.100.0/24的报文通过高速链路传输，而源IP地址为192.168.101.0/24的报文则通过低速链路传输。 

 

配置思路

采用重定向方式实现策略路由，进而提供差分服务，具体配置思路如下：

1. 创建VLAN并配置各接口，实现公司和外部网络设备互连。
2. 配置ACL规则，分别匹配源IP地址为192.168.100.0/24和192.168.101.0/24的报文。
3. 配置流分类，匹配规则为上述ACL规则，使设备可以对报文进行区分。
4. 配置流行为，使满足不同规则的报文分别被重定向到10.1.20.1/24和10.1.30.1/24。
5. 配置流策略，绑定上述流分类和流行为，并应用到接口GE0/0/3的入方向上，实现策略路由。

操作步骤

1. 创建VLAN并配置各接口

    

   # 在Switch上创建VLAN100和VLAN200。

   <HUAWEI> system-view
   [HUAWEI] sysname Switch
   [Switch] vlan batch 100 200

   # 配置Switch上接口GE0/0/1、GE0/0/2和GE0/0/3的接口类型为Trunk，并加入VLAN100和VLAN200。

   [Switch] interface gigabitethernet 0/0/1
   [Switch-GigabitEthernet0/0/1] port link-type trunk
   [Switch-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 200
   [Switch-GigabitEthernet0/0/1] quit
   [Switch] interface gigabitethernet 0/0/2
   [Switch-GigabitEthernet0/0/2] port link-type trunk
   [Switch-GigabitEthernet0/0/2] port trunk allow-pass vlan 100 200
   [Switch-GigabitEthernet0/0/2] quit
   [Switch] interface gigabitethernet 0/0/3
   [Switch-GigabitEthernet0/0/3] port link-type trunk
   [Switch-GigabitEthernet0/0/3] port trunk allow-pass vlan 100 200
   [Switch-GigabitEthernet0/0/3] quit

   # 创建VLANIF100和VLANIF200，并配置各虚拟接口IP地址。

   [Switch] interface vlanif 100
   [Switch-Vlanif100] ip address 10.1.20.2 24
   [Switch-Vlanif100] quit
   [Switch] interface vlanif 200
   [Switch-Vlanif200] ip address 10.1.30.2 24
   [Switch-Vlanif200] quit

    

2. 配置ACL规则

    

   # 在Switch上创建编码为3001、3002的高级ACL，规则分别为允许源IP地址为192.168.100.0/24和192.168.101.0/24的报文通过。

   [Switch] acl 3001
   [Switch-acl-adv-3001] rule permit ip source 192.168.100.0 0.0.0.255
   [Switch-acl-adv-3001] quit
   [Switch] acl 3002
   [Switch-acl-adv-3002] rule permit ip source 192.168.101.0 0.0.0.255
   [Switch-acl-adv-3002] quit

    

3. 配置流分类

    

   在Switch上创建流分类c1、c2，匹配规则分别为ACL 3001和ACL 3002。

   [Switch] traffic classifier c1 operator or
   [Switch-classifier-c1] if-match acl 3001
   [Switch-classifier-c1] quit
   [Switch] traffic classifier c2 operator or
   [Switch-classifier-c2] if-match acl 3002
   [Switch-classifier-c2] quit

    

4. 配置流行为

    

   # 在Switch上创建流行为b1、b2，并分别指定重定向到10.1.20.1/24和10.1.30.1/24的动作。

   [Switch] traffic behavior b1
   [Switch-behavior-b1] redirect ip-nexthop 10.1.20.1
   [Switch-behavior-b1] quit
   [Switch] traffic behavior b2
   [Switch-behavior-b2] redirect ip-nexthop 10.1.30.1
   [Switch-behavior-b2] quit

    

5. 配置流策略并应用到接口上

    

   # 在Switch上创建流策略p1，将流分类和对应的流行为进行绑定。

   [Switch] traffic policy p1
   [Switch-trafficpolicy-p1] classifier c1 behavior b1
   [Switch-trafficpolicy-p1] classifier c2 behavior b2
   [Switch-trafficpolicy-p1] quit

   # 将流策略p1应用到接口GE0/0/3的入方向上。

   [Switch] interface gigabitethernet 0/0/3
   [Switch-GigabitEthernet0/0/3] traffic-policy p1 inbound
   [Switch-GigabitEthernet0/0/3] return

    

6. 验证配置结果

    

   # 查看ACL规则的配置信息。

   <Switch> display acl 3001
   Advanced ACL 3001, 1 rule
   Acl's step is 5
    rule 5 permit ip source 192.168.100.0 0.0.0.255 (match-counter 0)

   <Switch> display acl 3002
   Advanced ACL 3002, 1 rule
   Acl's step is 5
    rule 5 permit ip source 192.168.101.0 0.0.0.255 (match-counter 0)

   # 查看流分类的配置信息。

   <Switch> display traffic classifier user-defined
     User Defined Classifier Information:
       Classifier: c2
        Operator: OR
        Rule(s) :if-match acl 3002
           
       Classifier: c1
         Operator: OR
         Rule(s) : if-match acl 3001
   
   Total classifier number is 2   
   

   # 查看流策略的配置信息。

   <Switch> display traffic policy user-defined p1
     User Defined Traffic Policy Information:
     Policy: p1
      Classifier: c1
       Operator: OR
        Behavior: b1
         Redirect: no forced
           Redirect ip-nexthop
           10.1.20.1
      Classifier: c2
       Operator: OR
        Behavior: b2
         Redirect: no forced
           Redirect ip-nexthop
           10.1.30.1

    

配置文件

• Switch的配置文件

  #
  sysname Switch
  #
  vlan batch 100 200 
  #
  acl number 3001
   rule 5 permit ip source 192.168.100.0 0.0.0.255
  acl number 3002
   rule 5 permit ip source 192.168.101.0 0.0.0.255
  #
  traffic classifier c1 operator or
   if-match acl 3001
  traffic classifier c2 operator or
   if-match acl 3002
  #
  traffic behavior b1
   redirect ip-nexthop 10.1.20.1
  traffic behavior b2
   redirect ip-nexthop 10.1.30.1
  #
  traffic policy p1 match-order config
   classifier c1 behavior b1
   classifier c2 behavior b2
  #
  interface Vlanif100
   ip address 10.1.20.2 255.255.255.0
  #
  interface Vlanif200
   ip address 10.1.30.2 255.255.255.0
  #
  interface GigabitEthernet0/0/1
   port link-type trunk
   port trunk allow-pass vlan 100 200
  #
  interface GigabitEthernet0/0/2
   port link-type trunk
   port trunk allow-pass vlan 100 200
  #
  interface GigabitEthernet0/0/3
   port link-type trunk
   port trunk allow-pass vlan 100 200
   traffic-policy p1 inbound
  #
  return
  

 摘自官方，博主汇总