<html> <head> <style></style></head> <body class='hmmessage'><div dir='ltr'>Hello, In stun\usages\timer.h, there are some flags related to STUN retransmission timer. /** * The default intial timeout to use for the timer */ #define STUN_TIMER_DEFAULT_TIMEOUT 600 /** * The default maximum retransmissions allowed before a timer decides to timeout */ #define STUN_TIMER_DEFAULT_MAX_RETRANSMISSIONS 3 /** * stun_timer_start: * Starts a STUN transaction retransmission timer. * This should be called as soon as you send the message for the first time on * a UDP socket. * The timeout before the next retransmission is set to @initial_timeout, then * each time a packet is retransmited, that timeout will be doubled, until the * @max_retransmissions retransmissions limit is reached. * total_timeout = initial_timeout * (2^(max_retransmissions + 1) - 1); */ Reducing STUN_TIMER_DEFAULT_MAX_RETRANSMISSIONS can significantly reduce the time used in local candidate gathering. I am wondering why the equation in timer.h which is used to calculate the total time needed for local candidate gathering does not consider the number of local & remote network interfaces? total_timeout = initial_timeout * (2^(max_retransmissions + 1) - 1); Tom </div></body> </html>