1、組網需求
圖1 策略路由組網示例圖
如上圖1所示，公司用戶通過Switch雙歸屬到外部網絡設備。其中，一條是低速鏈路，網關為10.1.20.1/24；另外一條是高速鏈路，網關為10.1.30.1/24。
公司希望上送外部網絡的報文中，IP優先級為4、5、6、7的報文通過高速鏈路傳輸，而IP優先級為0、1、2、3的報文則通過低速鏈路傳輸。
2、配置思路
1、創建VLAN并配置各接口，實現公司和外部網絡設備互連。
2、配置ACL規則，分別匹配IP優先級4、5、6、7，以及IP優先級0、1、2、3。
3、配置流分類，匹配規則為上述ACL規則，使設備可以對報文進行區分。
4、配置流行為，使滿足不同規則的報文分別被重定向到10.1.20.1/24和10.1.30.1/24。
5、配置流策略，綁定上述流分類和流行為，并應用到接口GE2/0/1的入方向上，實現策略路由。
3、操作步驟
3.1、創建VLAN并配置各接口
# 在Switch上創建VLAN100和VLAN200。
<HUAWEI> 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的接口類型為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與Switch對接的接口為Trunk類型接口，并加入VLAN100和VLAN200。
# 創建VLANIF100和VLANIF200，并配置各虛擬接口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
3.2、配置ACL規則
# 在Switch上創建編碼為3001、3002的高級ACL，規則分別為允許IP優先級0、1、2、3和允許IP優先級4、5、6、7的報文通過。
[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
3.3、配置流分類
在Switch上創建流分類c1、c2，匹配規則分別為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
3.4、配置流行為
# 在Switch上創建流行為b1、b2，并分別指定重定向到網段10.1.20.1/24和10.1.30.1/24的動作。
[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
3.5、配置流策略并應用到接口上
# 在Switch上創建流策略p1，將流分類和對應的流行為進行綁定。
[Switch] traffic policy p1
[Switch-trafficpolicy-p1] classifier c1 behavior b1
[Switch-trafficpolicy-p1] classifier c2 behavior b2
[Switch-trafficpolicy-p1] quit
# 將流策略p1應用到接口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
3.6、驗證配置結果
# 查看ACL規則的配置信息。
<Switch> 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)
<Switch> 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)
# 查看流分類的配置信息。
<Switch> 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。
<Switch> 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
4、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
