Symbol: ECHO_REQ
sys/net/sppp/if_spppsubr.c
1737
case ECHO_REQ:
sys/net/sppp/if_spppsubr.c
4735
sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
sys/net/sppp/if_spppsubr.c
5166
case ECHO_REQ: return "echo-req";