Index: busybox-1.31.1/init/init.c
===================================================================
--- busybox-1.31.1.orig/init/init.c	2021-03-31 20:03:39.284137278 +0800
+++ busybox-1.31.1/init/init.c	2021-03-31 19:41:32.417070800 +0800
@@ -944,6 +944,28 @@
 	_exit(EXIT_SUCCESS);
 }
 
+int checkBr2684ctlExist(void);
+int checkBr2684ctlExist(void)
+{
+	int Br2684ctlExist = 0;
+	char tmp[128] = {0}, buf[128] = {0};
+	FILE *fp = NULL;
+
+	system("ps | grep br2684ctl >/tmp/br2684.txt");
+	if((fp = fopen("/tmp/br2684.txt", "r")) != NULL){
+		while(fgets(buf, sizeof(buf) - 1, fp)){
+			if(!strstr(buf, "grep") && strstr(buf, "br2684ctl")){
+				Br2684ctlExist = 1;
+				break;
+			}
+		}
+		fclose(fp);
+	}
+	unlink(tmp);
+
+	return Br2684ctlExist;
+}
+
 static void run_shutdown_and_kill_processes(void)
 {
 	/* Run everything to be run at "shutdown".  This is done _prior_
@@ -953,6 +975,11 @@
 
 	message(L_CONSOLE | L_LOG, "The system is going down NOW!");
 
+	if(checkBr2684ctlExist() == 1){// kill pppd first, otherwise CPE does not send PADT
+		system("killall pppd");
+		usleep(500000);system("killall -9 pppd");
+	}
+
 	/* Send signals to every process _except_ pid 1 */
 	kill(-1, SIGTERM);
 	message(L_CONSOLE, "Sent SIG%s to all processes", "TERM");