RPL_SERVERVERSION = 4, // 2812, not 1459
RPL_ISUPPORT = 5, // not RFC, extremely common though (defined as RPL_BOUNCE in 2812, widely ignored)
RPL_SERVERVERSION = 4, // 2812, not 1459
RPL_ISUPPORT = 5, // not RFC, extremely common though (defined as RPL_BOUNCE in 2812, widely ignored)