Hi. I using the PPPoE connection on DSL Line. In the past few days, when I downloading or streaming on the net, suddenly my connection drops. everytime I login to the OpenWRT to see whats happen, and I see my WAN interface lose the connection and says failed to connect.
Fortunately I enable debug mode for wan interface by 'option pppd_options 'debug'.
Lets see what happens when the connection drops:
Sat Mar 21 21:31:54 2020 daemon.info pppd[2357]: No response to 5 echo-requests
Sat Mar 21 21:31:54 2020 daemon.notice pppd[2357]: Serial link appears to be disconnected.
Sat Mar 21 21:31:54 2020 daemon.info pppd[2357]: Connect time 27.1 minutes.
Sat Mar 21 21:31:54 2020 daemon.info pppd[2357]: Sent 7969278 bytes, received 199019725 bytes.
Sat Mar 21 21:31:54 2020 daemon.notice netifd: Network device 'pppoe-wan' link is down
Sat Mar 21 21:31:54 2020 daemon.debug pppd[2357]: Script /lib/netifd/ppp-down started (pid 2856)
Sat Mar 21 21:31:54 2020 daemon.debug pppd[2357]: sent [LCP TermReq id=0x2 "Peer not responding"]
Sat Mar 21 21:31:57 2020 daemon.debug pppd[2357]: sent [LCP TermReq id=0x3 "Peer not responding"]
Sat Mar 21 21:32:00 2020 daemon.notice pppd[2357]: Connection terminated.
Sat Mar 21 21:32:00 2020 daemon.debug pppd[2357]: Send PPPOE Discovery V1T1 PADT session 0x27e7 length 0
Sat Mar 21 21:32:00 2020 daemon.debug pppd[2357]: dst **:**:**:**:**:** src **:**:**:**:**:**
Sat Mar 21 21:32:00 2020 daemon.debug pppd[2357]:
Sat Mar 21 21:32:00 2020 daemon.info pppd[2357]: Sent PADT
Sat Mar 21 21:32:00 2020 daemon.notice pppd[2357]: Modem hangup
Sat Mar 21 21:32:00 2020 daemon.info pppd[2357]: Exit.
and after that, attempting to establishing new connection Fails, here is the message and it retrying until I reboot the Modem.
Sat Mar 21 21:32:00 2020 daemon.info pppd[3052]: Plugin rp-pppoe.so loaded.
Sat Mar 21 21:32:00 2020 daemon.info pppd[3052]: RP-PPPoE plugin version 3.8p compiled against pppd 2.4.7
Sat Mar 21 21:32:00 2020 daemon.notice pppd[3052]: pppd 2.4.7 started by root, uid 0
Sat Mar 21 21:32:00 2020 daemon.debug pppd[3052]: Send PPPOE Discovery V1T1 PADI session 0x0 length 4
Sat Mar 21 21:32:00 2020 daemon.debug pppd[3052]: dst ff:ff:ff:ff:ff:ff src **:**:**:**:**:**
Sat Mar 21 21:32:00 2020 daemon.debug pppd[3052]: [service-name]
Sat Mar 21 21:32:05 2020 daemon.debug pppd[3052]: Send PPPOE Discovery V1T1 PADI session 0x0 length 4
Sat Mar 21 21:32:05 2020 daemon.debug pppd[3052]: dst ff:ff:ff:ff:ff:ff src **:**:**:**:**:**
Sat Mar 21 21:32:05 2020 daemon.debug pppd[3052]: [service-name]
Sat Mar 21 21:32:10 2020 daemon.debug pppd[3052]: Send PPPOE Discovery V1T1 PADI session 0x0 length 4
Sat Mar 21 21:32:10 2020 daemon.debug pppd[3052]: dst ff:ff:ff:ff:ff:ff src **:**:**:**:**:**
Sat Mar 21 21:32:10 2020 daemon.debug pppd[3052]: [service-name]
Sat Mar 21 21:32:15 2020 daemon.warn pppd[3052]: Timeout waiting for PADO packets
Sat Mar 21 21:32:15 2020 daemon.err pppd[3052]: Unable to complete PPPoE Discovery
Sat Mar 21 21:32:15 2020 daemon.info pppd[3052]: Exit.
to get out of this situation, I have to reboot the device.
I set the manually this code for the wan connection: option keepalive '50 5', and then I see drop message changed:
Sat Mar 21 21:54:02 2020 daemon.info pppd[2365]: Terminating on signal 15
Sat Mar 21 21:54:02 2020 daemon.info pppd[2365]: Connect time 10.2 minutes.
Sat Mar 21 21:54:02 2020 daemon.info pppd[2365]: Sent 25251251 bytes, received 1132512706 bytes.
Sat Mar 21 21:54:02 2020 daemon.notice netifd: Network device 'pppoe-wan' link is down
Sat Mar 21 21:54:02 2020 daemon.debug pppd[2365]: Script /lib/netifd/ppp-down started (pid 7840)
Sat Mar 21 21:54:02 2020 daemon.debug pppd[2365]: sent [LCP TermReq id=0x2 "User request"]
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: rcvd [LCP TermAck id=0x2]
Sat Mar 21 21:54:03 2020 daemon.notice pppd[2365]: Connection terminated.
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: Send PPPOE Discovery V1T1 PADT session 0x8651 length 0
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: dst **:**:**:**:**:** src **:**:**:**:**:**
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]:
Sat Mar 21 21:54:03 2020 daemon.info pppd[2365]: Sent PADT
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: Waiting for 1 child processes...
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: script /lib/netifd/ppp-down, pid 7840
Sat Mar 21 21:54:03 2020 daemon.debug pppd[2365]: Script /lib/netifd/ppp-down finished (pid 7840), status = 0x1
Sat Mar 21 21:54:03 2020 daemon.info pppd[2365]: Exit.
So, I can't fix that by changing the keepalive parameter. what is the problem and what should I do?