For example , if you re like many programmers who have become spoiled from using an obliging ide , you probably like to type code in quickly without much regard for style , stopping only every so often to straighten things out by using the format command 例如，如果您与许多偏爱使用ide功能的程序员一样，那么您可能喜欢快速输入代码，而不管其风格，只是偶尔使用ide的format命令美化代码。
Efm use ordinary ethernet frame to transport oam information but special destination address and type code field , considering epon protocols were standarded last year , most of the network device may not recognize the oam frame above data link layer , so we use linux access link layer method to construct / capture oam frame at l2 Ieee802 . 3ah协议规定使用标准的以太帧作为传送oam信息的载体,但使用特殊的组播目的地址域和类型/长度域,以区别普通的以太数据。由于协议是2004年刚颁布的,所以现有的网络设备很可能不能识别新的oam帧,这就需要在数据链路层对数据包进行捕获和构造。
