核心交换机虚拟化技术 核心交换机策略

 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

1. 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

1. 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

1. 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

1. 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

1. 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