Symbol: ICMP_UNREACH_NET_UNKNOWN
usr/src/uts/common/inet/ipf/netinet/ip_compat.h
1963
# define ICMP_UNREACH_NET_UNKNOWN 6
usr/src/uts/common/netinet/ip_icmp.h
137
#define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */