ROS软路由流控中PCQ动态限速设置教程.docx

PCQ即per connection queuing（每次连接排序）。踏实唯一一种能无等级排序的限流策略。PCQ会根据pcq-classifier参数产生子队列。每个子队列都有一个pcq-rate的数据率限制和pcq-limit大小的数据包。PCQ总大小不能大于PCQ-total-limit。为什么需要配置PCQ呢？比如在局域网中总带宽为20M的带宽，如果不做流控一个用户可能把带宽资源全部霸占掉，从而影响掉其他用户的带宽。如果做每个带宽限制在1M，那么内网只有几个用户上网时，从而会浪费带宽。所以我们做一个PCQ，限制下载为4M，上传为2M。这样当用户为2台时，他们的下载为4M，上传为2M。当用户为5台时下载为4M，上传为2M。当用户超过5个时，那门所以的用户就共享20M的带宽了。PCQ实例单线接入首先做好一个网络连通的基本配置步骤：外网连接：固定IP接入或者PPPOE-client拨号NAT配置DNS配置内网配置，一般设置DHCP其他设置就是路由器的时间设置能正常连通外网后，就可以设置其他的策略了。PCQ设置步骤：抓取内外网的数据对抓取到的数据做PCQ策略网络的基本配置就不多说了，这里直接配置PCQ1.抓取内外网数据：Mangle配置通过mangle的prerouting链表抓取tel口和lan口的数据标记电信接口，即网络的下载，in-interface=ether2-tel，passthrough=no（passthrough=no意思是标记的该条规则的数据不传递给下一条规则。也就可以这样说，把这条数据标记出来然后提取后就交给相应的规则处理，其他的规则就不能处理该条规则了）标记电信接口，即网络的上传，in-interface=ether1-lan，passthrough=no2. 对抓取到的数据做PCQ策略总带宽12Mbps，主机120台为每台主机下载分配总带宽的1/3，即down规则的pcq-rate=4M通过计算total-limit=limit*120=6000下载通过dst-address分类，上传通过src-addre分类本帖隐藏的内容本帖隐藏的内容配置queue tree在queue tree中添加规则，配置下行流量控制，取名为down配置下行数据时注意总带宽为12M，需要保留部分缓冲带宽大概在1-2M，这里保留1.5M,在ROS中不支持小数，需要用整数表示，即max-limit-10500k配置上行流量，取名为up配置上行流量数据一般小于实际带宽，通常情况下上行带宽较小，所以设置为8M，在max-limit=8MAdhered to comprehensively strengthen the partys ideological, organizational, style, system, and focus on fighting corruption and upholding integrity, continuously improve the scientific level of the construction, in order to promote sound and fast economic and social development to provide strong protection. 1. the exploration and innovation, strengthening the partys ideological building. Persist in the first place to ideological construction, strengthening and improving the theory work, persistently arm the vast numbers of party members and cadres with theories of socialism with Chinese characteristics, strengthen the ideal and belief education, establish a correct world Outlook, views on power and interest. Advancing the construction of study-oriented party organization and the learning cadre, establish a sound learning system, continuously enhance the overall quality. Further emancipating the mind, improve the ability of integrating theory with practice, problem solving and the combine to solve practical problems, to improve the theory, combining knowledge and improve the art of leadership, adhere to, which was to promote, in an effort to promote scientific development and social harmony made new achievements. 2. work hard, strengthen cadre. Stick through the construction of party system construction,