Symbol: ECHO_REQ
sys/net/if_spppsubr.c
1804
case ECHO_REQ:
sys/net/if_spppsubr.c
5545
sppp_cp_send(sp, PPP_LCP, ECHO_REQ,
sys/net/if_spppsubr.c
6270
case ECHO_REQ: return "echo-req";