Symbol: net_getmtu
usr/src/uts/common/inet/ipf/ip_fil_solaris.c
1568
icmp->icmp_nextmtu = net_getmtu(ifs->ifs_ipf_ipv4, phy,0 );
usr/src/uts/common/sys/neti.h
283
extern int net_getmtu(net_handle_t, phy_if_t, lif_if_t);