Symbol: IPV6_RECVPATHMTU
usr/src/boot/include/netinet6/in6.h
449
#define IPV6_RECVPATHMTU 43 /* bool; notify an according MTU */
usr/src/uts/common/netinet/in.h
1268
#define IPV6_RECVPATHMTU 0x24 /* receive PMTU info */