inux 虚拟网桥默认会悄悄地删除LLDP消息(发送到LLDP_Multicast地址01-80-C2-00-00-0E)和01-80-C2-00-00-xx范围内的其他控制帧。原因可以在802.1AB标准中找到，该标准规定：
“the destination address shall be 01-80-C2-00-00-0E. This address is within the range reserved by IEEE Std 802.1D-2004 for protocols constrained to an individual LAN, and ensures that the LLDPDU will not be forward by MAC Bridges that conform to IEEE Std 802.1D-2004.”
目的地地址应为01-80-C2-00-00-0E。这个地址在IEEE Std 802.1D-2004为单个LAN的协议保留的范围内，并确保符合IEEE Std 802.1D-2004的MAC桥接器不会转发LLDPDU。
echo 16384 > /sys/class/net/<bridge_name>/bridge/group_fwd_mask
eve内核
https://www.cnblogs.com/hzhlog/p/12904046.html
https://www.cnblogs.com/hzhlog/p/12904033.html