Use RTO.Initial of 1 sec as specified in RFC 4960bis
#if defined(__FreeBSD__) && !defined(__Userspace__)
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD: head/sys/netinet/sctp_constants.h 365071 2020-09-01 21:19:14Z mjg $");
+__FBSDID("$FreeBSD$");
#endif
#ifndef _NETINET_SCTP_CONSTANTS_H_
@@ -610,7 +610,7 @@ extern void getwintimeofday(struct timeval *tv);
#define SCTP_RTO_UPPER_BOUND (60000) /* 60 sec in ms */
#define SCTP_RTO_LOWER_BOUND (1000) /* 1 sec is ms */
-#define SCTP_RTO_INITIAL (3000) /* 3 sec in ms */
+#define SCTP_RTO_INITIAL (1000) /* 1 sec in ms */
#define SCTP_INP_KILL_TIMEOUT 20 /* number of ms to retry kill of inpcb */
#define SCTP_ASOC_KILL_TIMEOUT 10 /* number of ms to retry kill of inpcb */
