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 --------保证带宽
traffic behavior 5M
car cir 5000 ---------限制带宽
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