Symbol: IPV6_USE_MIN_MTU
usr/src/boot/include/netinet6/in6.h
448
#define IPV6_USE_MIN_MTU 42 /* bool; send packets at the minimum MTU */
usr/src/uts/common/netinet/in.h
1264
#define IPV6_USE_MIN_MTU 0x20 /* send packets with minimum MTU */