XX涉及的QOS限速主要有两种：
第一种是针对一个端口下双向IP互访；
第二种是针对多个端口下双向IP互访；（聚合car）
聚合car：是指能够对多个业务使用同一个car进行流量监控，即如果多个端口应用同一个聚合CAR，则这多个端口的流量之和必须在此聚合CAR设定的流量监管范围之内。
总部与分部之间为20M专线。现要求：分支10.2.2.0/24和总部10.4.4.0/24为重要业务，要保障带宽10M；10.1.1.0/24和10.3.3.0/24互访限制5M
分支MSR:
流定义：
acl advanced 3000
rule 0 permit ip source 10.1.1.0 0.0.0.255 destination 10.3.3.0 0.0.0.255
acl advanced 3001
rule 0 permit ip source 10.2.2.0 0.0.0.255 destination 10.4.4.0 0.0.0.255
traffic classifier 10M operator and
if-match acl 3001
traffic classifier 5M operator and
if-match acl 3000
流行为：
traffic behavior 10M
queue ef bandwidth 1024
traffic behavior 5M
car cir 5000
流策略：
qos policy xiansu
classifier 10M behavior 10M
classifier 5M behavior 5M
应用：
interface GigabitEthernet0/1r
qos apply policy xiansu outbound
验证：
dis qos policy interface GigabitEthernet 0/1
Interface: GigabitEthernet0/1
Direction: Outbound
Policy: xiansu
Classifier: default-class
Matched : 0 (Packets) 0 (Bytes)
5-minute statistics:
Forwarded: 0/0 (pps/bps)
Dropped : 0/0 (pps/bps)
Operator: AND
Rule(s) :
If-match any
Behavior: be
Default Queue:
Flow based Weighted Fair Queue:
Max number of hashed queues: 256
Matched : 0 (Packets) 0 (Bytes)
Enqueued : 0 (Packets) 0 (Bytes)
Discarded: 0 (Packets) 0 (Bytes)
Discard Method: Tail
Classifier: 10M
Matched : 0 (Packets) 0 (Bytes)
5-minute statistics:
Forwarded: 0/0 (pps/bps)
Dropped : 0/0 (pps/bps)
Operator: AND
Rule(s) :
If-match acl 3001
Behavior: 10M
Expedited Forwarding:
Bandwidth 1024 (kbps) CBS 25600 (Bytes)
Matched : 0 (Packets) 0 (Bytes)
Enqueued : 0 (Packets) 0 (Bytes)
Discarded: 0 (Packets) 0 (Bytes)
Discard Method: Tail
Classifier: 5M
Matched : 0 (Packets) 0 (Bytes)
5-minute statistics:
Forwarded: 0/0 (pps/bps)
Dropped : 0/0 (pps/bps)
Operator: AND
Rule(s) :
If-match acl 3000
Behavior: 5M
Committed Access Rate:
CIR 5000 (kbps), CBS 312500 (Bytes), EBS 0 (Bytes)
Green action : pass
Yellow action : pass
Red action : discard
Green packets : 0 (Packets) 0 (Bytes)
Yellow packets: 0 (Packets) 0 (Bytes)
Red packets : 0 (Packets) 0 (Bytes)
总部MSR配置一样，把ACL的源目调反就可以了。
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聚合car：
这里模拟工作的环境，在一个节点做双向的限速：
创建聚合car：（应题目双向）
qos car xiansu-1 aggregative cir 10240 cbs 2560000 ebs 0 red discard
qos car xiansu-2 aggregative cir 10240 cbs 2560000 ebs 0 red discard
流定义：
acl advanced 3000
rule 0 permit ip source 10.2.2.0 0.0.0.255 destination 10.4.4.0 0.0.0.255
acl advanced 3001
rule 0 permit ip source 10.4.4.0 0.0.0.255 destination 10.2.2.0 0.0.0.255
traffic classifier 1 operator and
if-match acl 3000
traffic classifier 2 operator and
if-match acl 3001
流行为：
traffic behavior 1
car name xiansu-1
traffic behavior 2
car name xiansu-2
流策略：
qos policy xiansu-1
classifier 1 behavior 1
qos policy xiansu-2
classifier 2 behavior 2
应用：
interface GigabitEthernet1/0/1
qos apply policy xiansu-1 inbound
qos apply policy xiansu-2 outbound
验证：
dis qos policy interface GigabitEthernet 1/0/1
Interface: GigabitEthernet1/0/1
Direction: Inbound
Policy: xiansu-1
Classifier: 1
Operator: AND
Rule(s) :
If-match acl 3000
Behavior: 1
Committed Access Rate:
Car name: xiansu-1
Interface: GigabitEthernet1/0/1
Direction: Outbound
Policy: xiansu-2
Classifier: 2
Operator: AND
Rule(s) :
If-match acl 3001
Behavior: 2
Committed Access Rate:
Car name: xiansu-2