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:- 创建VLAN并配置各接口,实现公司和外部网络设备互连。
- 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。
- 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。
- 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。
- 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
- 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
- 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
- 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
- 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
- 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
- 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
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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