组网需求
如上图所示，公司用户通过Switch双归属到外部网络设备。其中，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。
公司希望上送外部网络的报文中，IP优先级为4、5、6、7的报文通过高速链路传输，而IP优先级为0、1、2、3的报文则通过低速链路传输。
配置思路
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IP优先级4、5、6、7，以及IP优先级0、1、2、3。
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GE2/0/1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。
system-view
[HUAWEI] sysname Switch
[Switch] vlan batch 100 200
# 配置Switch上接口GE1/0/1、GE1/0/2和GE2/0/1的接口类型为Trunk，并加入VLAN100和VLAN200。
[Switch] interface gigabitethernet 1/0/1
[Switch-GigabitEthernet1/0/1] port link-type trunk
[Switch-GigabitEthernet1/0/1] port trunk allow-pass vlan 100 200
[Switch-GigabitEthernet1/0/1] quit
[Switch] interface gigabitethernet 1/0/2
[Switch-GigabitEthernet1/0/2] port link-type trunk
[Switch-GigabitEthernet1/0/2] port trunk allow-pass vlan 100 200
[Switch-GigabitEthernet1/0/2] quit
[Switch] interface gigabitethernet 2/0/1
[Switch-GigabitEthernet2/0/1] port link-type trunk
[Switch-GigabitEthernet2/0/1] port trunk allow-pass vlan 100 200
[Switch-GigabitEthernet2/0/1] quit
配置LSW与Switch对接的接口为Trunk类型接口，并加入VLAN100和VLAN200。
# 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IP优先级0、1、2、3和允许IP优先级4、5、6、7的报文通过。
[Switch] acl 3001
[Switch-acl-adv-3001] rule permit ip precedence 0
[Switch-acl-adv-3001] rule permit ip precedence 1
[Switch-acl-adv-3001] rule permit ip precedence 2
[Switch-acl-adv-3001] rule permit ip precedence 3
[Switch-acl-adv-3001] quit
[Switch] acl 3002
[Switch-acl-adv-3002] rule permit ip precedence 4
[Switch-acl-adv-3002] rule permit ip precedence 5
[Switch-acl-adv-3002] rule permit ip precedence 6
[Switch-acl-adv-3002] rule permit ip precedence 7
[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 and
[Switch-classifier-c1] if-match acl 3001
[Switch-classifier-c1] quit
[Switch] traffic classifier c2 operator and
[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网段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GE2/0/1的入方向上。
[Switch] interface gigabitethernet 2/0/1
[Switch-GigabitEthernet2/0/1] traffic-policy p1 inbound
[Switch-GigabitEthernet2/0/1] return
6、验证配置结果
# 查看ACL规则的配置信息。
display acl 3001
Advanced ACL 3001, 4 rules
Acl’s step is 5
rule 5 permit ip precedence routine (match-counter 0)
rule 10 permit ip precedence priority (match-counter 0)
rule 15 permit ip precedence immediate (match-counter 0)
rule 20 permit ip precedence flash (match-counter 0)
display acl 3002
Advanced ACL 3002, 4 rules
Acl’s step is 5
rule 5 permit ip precedence flash-override (match-counter 0)
rule 10 permit ip precedence critical (match-counter 0)
rule 15 permit ip precedence internet (match-counter 0)
rule 20 permit ip precedence network (match-counter 0)
# 查看流分类的配置信息。
display traffic classifier user-defined
User Defined Classifier Information:
Classifier: c1
Precedence: 5
Operator: AND
Rule(s) : if-match acl 3001
Classifier: c2
Precedence: 10
Operator: AND
Rule(s) :if-match acl 3002
Total classifier number is 2
# 查看流策略的配置信息。
display traffic policy user-defined p1
User Defined Traffic Policy Information:
Policy: p1
Classifier: c1
Operator: AND
Behavior: b1
Redirect: no forced
Redirect ip-nexthop
10.1.20.1
Classifier: c2
Operator: AND
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 precedence routine
rule 10 permit ip precedence priority
rule 15 permit ip precedence immediate
rule 20 permit ip precedence flash
#
acl number 3002
rule 5 permit ip precedence flash-override
rule 10 permit ip precedence critical
rule 15 permit ip precedence internet
rule 20 permit ip precedence network
#
traffic classifier c1 operator and precedence 5
if-match acl 3001
traffic classifier c2 operator and precedence 10
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 GigabitEthernet1/0/1
port link-type trunk
port trunk allow-pass vlan 100 200
#
interface GigabitEthernet1/0/2
port link-type trunk
port trunk allow-pass vlan 100 200
#
interface GigabitEthernet2/0/1
port link-type trunk
port trunk allow-pass vlan 100 200
traffic-policy p1 inbound
#
return
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