红帽全球峰会17.14.10.3. STP（Spanning Tree 协议）
协议 ID：sp
这个类型的规则应该进入 root 或 stp 链。
| 属性名称 | datatype | 定义 |
|---|---|---|
| srcmacaddr | MAC_ADDR | 发件人的 MAC 地址 |
| srcmacmask | MAC_MASK | 应用到发送者的 MAC 地址的掩码 |
| type | UINT8 | 网桥协议数据单元(BPDU)类型 |
| flags | UINT8 | BPDU 标志dstmacmask |
| root-priority | UINT16 | 根优先级范围开始 |
| root-priority-hi | UINT16 (0x0-0xfff, 0 - 4095) | 根优先级范围末尾 |
| root-address | MAC _ADDRESS | 根 MAC 地址 |
| root-address-mask | MAC _MASK | 根 MAC 地址掩码 |
| roor-cost | UINT32 | 根路径成本（范围开始） |
| root-cost-hi | UINT32 | 根路径成本范围结束 |
| sender-priority-hi | UINT16 | 发件人优先级范围结束 |
| sender-address | MAC_ADDRESS | BPDU 发件人 MAC 地址 |
| sender-address-mask | MAC_MASK | BPDU 发件人 MAC 地址掩码 |
| 端口 | UINT16 | 端口标识符（范围启动） |
| port_hi | UINT16 | 端口标识符范围结束 |
| msg-age | UINT16 | Message age timer（范围开始） |
| msg-age-hi | UINT16 | 消息年龄计时器范围结束 |
| max-age-hi | UINT16 | 最长年龄时间范围结束 |
| hello-time | UINT16 | hello 时间计时器（范围开始） |
| hello-time-hi | UINT16 | hello 时间计时器范围结束 |
| forward-delay | UINT16 | 转发延迟（范围开始） |
| forward-delay-hi | UINT16 | 转发延迟范围结束 |
| 注释 | 字符串 | 最多 256 个字符的文本字符串 |
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