Symbol: PPP_MINMRU
sys/net/if_ppp.c
574
if (mru >= PPP_MINMRU && mru <= PPP_MAXMRU)
sys/net/if_spppsubr.c
1380
if (ifr->ifr_mtu < PPP_MINMRU ||
sys/net/if_spppsubr.c
3122
if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu)