Symbol: ECHO_REQ
sys/net/if_spppsubr.c
1321
case ECHO_REQ:
sys/net/if_spppsubr.c
4190
sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
sys/net/if_spppsubr.c
4780
case ECHO_REQ: return "echo-req";