ECHO_REPLY       1558 net/if_spppsubr.c 		sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
ECHO_REPLY       1560 net/if_spppsubr.c 	case ECHO_REPLY:
ECHO_REPLY       4250 net/if_spppsubr.c 	case ECHO_REPLY: return "echo-reply";