MQC配置案例

案例配置拓扑&＃xff1a;

2 案例配置需求
1、 在五台路由器之间运行OSPF协议&＃xff0c;发布直连网段和环回口;
2、 在R4上配置接口S1/4只能接收IP优先级5和6的数据包&＃xff1b;
3、 在R5上配置接口S1/5只能接收IP优先级6的数据包&＃xff1b;
4、 在R1上使用扩展ping&＃xff0c;TOS为64&＃xff0c;要求可以ping通R4&＃xff1b;
5、 在R2上使用扩展ping&＃xff0c;TOS为128&＃xff0c;要求可以ping通R5&＃xff1b;
案例配置思路
1.根据拓扑配置IP地址

R1:
interface Loopback0ip address 1.1.1.1 255.255.255.0ip ospf network point-to-pointinterface Serial1/1ip address 13.1.1.1 255.255.255.0serial restart-delay 0R2:
interface Loopback0ip address 2.2.2.2 255.255.255.0ip ospf network point-to-pointinterface Serial1/2ip address 23.1.1.1 255.255.255.0R3&＃xff1a;
interface Loopback0ip address 3.3.3.3 255.255.255.0interface Serial1/1ip address 13.1.1.2 255.255.255.0
interface Serial1/2ip address 23.1.1.2 255.255.255.0
interface Serial1/4ip address 34.1.1.2 255.255.255.0
interface Serial1/5ip address 35.1.1.2 255.255.255.0R4&＃xff1a;
interface Loopback0ip address 4.4.4.4 255.255.255.0ip ospf network point-to-pointinterface Serial1/4ip address 34.1.1.1 255.255.255.0R5&＃xff1a;
interface Loopback0ip address 5.5.5.5 255.255.255.0ip ospf network point-to-pointinterface Serial1/5ip address 35.1.1.1 255.255.255.0

2.配置OSPF协议

R1&＃xff1a;
router ospf 100router-id 91.1.1.1log-adjacency-changesnetwork 1.1.1.0 0.0.0.255 area 0network 13.1.1.0 0.0.0.255 area 0R2&＃xff1a;
router ospf 100router-id 92.2.2.2log-adjacency-changesnetwork 2.2.2.0 0.0.0.255 area 0network 23.1.1.0 0.0.0.255 area 0R3&＃xff1a;
router ospf 100router-id 93.3.3.3log-adjacency-changesnetwork 13.1.1.0 0.0.0.255 area 0network 23.1.1.0 0.0.0.255 area 0network 34.1.1.0 0.0.0.255 area 0network 35.1.1.0 0.0.0.255 area 0R4&＃xff1a;
router ospf 100router-id 94.4.4.4log-adjacency-changesnetwork 4.4.4.0 0.0.0.255 area 0network 34.1.1.0 0.0.0.255 area 0R5&＃xff1a;
router ospf 100router-id 95.5.5.5log-adjacency-changesnetwork 5.5.5.0 0.0.0.255 area 0network 35.1.1.0 0.0.0.255 area 0

3.在R4的接口上配置数据过滤&＃xff1a;

access-list 100 permit ip any any precedence critical /只接收IP优先级5的数据/
access-list 100 permit ip any any precedence internet /只接收IP优先级6的数据/
interface serial 1/4
ip access-group 100 in /接口下调用ACL/


4.在R5的接口上配置数据过滤&＃xff1a;

access-list 100 permit ip any any precedence internet
interface serial 1/5
ip access-group 100 in


5.在R3上配置MQC&＃xff0c;转换数据优先级&＃xff1a;

access-list 100 permit ip host 1.1.1.1 host 4.4.4.4 precedence immediate
/匹配从1.1.1.1发往4.4.4.4且优先级为2的数据/
access-list 101 permit ip host 2.2.2.2 host 5.5.5.5 precedence flash-override
/匹配从2.2.2.2发往5.5.5.5且优先级为4的数据/class-map match-all pre4 /创建类图pre4/match access-group 101 /调用ACL 101/
class-map match-all pre2match access-group 100
!
!
policy-map MQC /创建策略映射图MQC/class pre2 /调用类图pre2/set precedence 5 /设置IP优先级为5/class pre4set precedence 6


案例检验结果
1、 配置完成后,用1.1.1.1去ping 4.4.4.4&＃xff1a;
2、 配置完成后&＃xff0c;在R1上用1.1.1.1扩展ping的TOS 64去ping 4.4.4.4

案例总结及其它
1、 MQC是模块化QOS配置命令集&＃xff0c;由匹配流量、设置流量、调用策略三个部分组成&＃xff1b;
2、 使用ACL配合class-map来匹配流量&＃xff1b;
3、 使用policy-map调用class-map来设置流量&＃xff1b;
4、 MQC可以在接口下、子接口、控制模版下调用&＃xff1b;
5、 数据包的优先级可以用TOS、DSCP、IP优先级三种方式来定义&＃xff0c;他们之间可以互相转换&＃xff1b;
6、 TOS&＃61;DSCP8&＃61;IP64&＃xff1b;