默认 Junos OS CoS 设置
如果不在路由器上配置任何 CoS 设置，软件将执行一些 CoS 功能，以确保在网络出现拥塞时，用户流量和协议数据包的转发延迟最小。某些默认映射会自动应用于您配置的每个 逻辑接口 。只有当您明确地将其与接口相关联时，其他默认映射（如显式默认分类器和 重写规则）才在运行中。
您可通过发出show class-of-service操作模式命令来显示默认 CoS 设置。本节包含显示默认 CoS 设置的样本输出。样本输出会被截断以实现简洁性。
显示服务等级
user@host> show class-of-service
注意：
某些平台需要在命令后进行 show class-of-service 论证。争论是选择以下输出的一部分来显示。
默认转发类
Forwarding class Queue best-effort 0 expedited-forwarding 1 assured-forwarding 2 network-control 3
默认代码点别名
Code point type: dscp Alias Bit pattern af11 001010 af12 001100 ... Code point type: dscp-ipv6 ... Code point type: exp ... Code point type: ieee-802.1 ... Code point type: inet-precedence ... Code point type: ieee-802.1ad ...
默认分类器
Classifier: dscp-default, Code point type: dscp, Index: 7 ... Classifier: dscp-ipv6-default, Code point type: dscp-ipv6, Index: 8 ... Classifier: exp-default, Code point type: exp, Index: 9 ... Classifier: ieee8021p-default, Code point type: ieee-802.1, Index: 10 ... Classifier: ipprec-default, Code point type: inet-precedence, Index: 11 ... Classifier: ipprec-compatibility, Code point type: inet-precedence, Index: 12 ... Classifier: ieee8021ad-default, Code point type: ieee-802.1ad, Index: 41 ...
默认帧中继丢失优先级映射
Loss-priority-map: frame-relay-de-default, Code point type: frame-relay-de, Index: 13 Code point Loss priority 0 low 1 high
默认重写规则
Rewrite rule: dscp-default, Code point type: dscp, Index: 24 Forwarding class Loss priority Code point best-effort low 000000 best-effort high 000000 ... Rewrite rule: dscp-ipv6-default, Code point type: dscp-ipv6, Index: 25 ... Rewrite rule: exp-default, Code point type: exp, Index: 26 ... Rewrite rule: ieee8021p-default, Code point type: ieee-802.1, Index: 27 ... Rewrite rule: ipprec-default, Code point type: inet-precedence, Index: 28 ... Rewrite rule: ieee8021ad-default, Code point type: ieee-802.1ad, Index: 42 ...
默认丢弃配置文件
Drop profile: <default-drop-profile>, Type: discrete, Index: 1
Fill level Drop probability
100 100
默认时间表
Scheduler map: <default>, Index: 2
Scheduler: <default-be>, Forwarding class: best-effort, Index: 17
Transmit rate: 95 percent, Rate Limit: none, Buffer size: 95 percent, Priority: low
Drop profiles:
Loss priority Protocol Index Name
Low Any 1 <default-drop-profile>
High Any 1 <default-drop-profile>
...