IPV6_MTU_DISCOVER(2const)                            IPV6_MTU_DISCOVER(2const)

NAME
       IPV6_MTU_DISCOVER - path maximum transfer unit size discovery

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <netinet/in.h>  /* Definition of IP* constants */
       #include <sys/socket.h>

       int setsockopt(int sockfd, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
                      const int *val, sizeof(int));
       int getsockopt(int sockfd, IPPROTO_IPV6, IPV6_MTU_DISCOVER,
                      int *val, sizeof(int));

DESCRIPTION
       Set or receive the Path MTU Discovery setting for a socket.

       See IP_MTU_DISCOVER(2const).

ERRORS
       See IPPROTO_IPV6(2const).  See setsockopt(2).  See ipv6(7).

SEE ALSO
       IPPROTO_IPV6(2const), setsockopt(2), ipv6(7)

Linux man-pages 6.17              2025-12-02         IPV6_MTU_DISCOVER(2const)