Hello innova,
I tried both scenarios 1 and 3 in our lab. In both cases, the SM continues to attempt to initiate a PPPoE session, which eventually times out, and it is re-attempted after 45 secs. I used our current BETA software for this test, but I've seen the same behavior in previous sw loads.
If you enable all syslog levels from the Configuration->System page, you should see something similar to this in syslog:
Sep 1 01:24:18 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:24:33 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:24:33 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:25:03 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:25:18 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:25:18 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:25:48 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:26:03 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:26:03 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:26:33 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:26:48 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:26:48 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:27:18 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:27:33 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:27:33 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:28:03 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:28:18 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:28:18 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:28:49 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:29:04 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:29:04 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:29:34 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:29:49 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:29:49 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:30:19 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:30:34 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:30:34 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:30:44 Customer Name lldpd[4529]: unable to get system name Sep 1 01:31:04 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:31:19 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:31:19 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:31:49 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:32:04 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:32:04 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:32:34 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:32:49 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:32:49 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:32:52 Customer Name dnsmasq-dhcp[4281]: DHCPINFORM(eth0) 169.254.1.19 00:1c:c4:71:17:0e Sep 1 01:32:52 Customer Name dnsmasq-dhcp[4281]: DHCPACK(eth0) 169.254.1.19 00:1c:c4:71:17:0e PANDORA6 Sep 1 01:33:19 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:33:34 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:33:34 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:34:04 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:34:19 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:34:19 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:34:39 Customer Name dnsmasq-dhcp[4281]: DHCPINFORM(eth0) 169.254.1.19 00:1c:c4:71:17:0e Sep 1 01:34:39 Customer Name dnsmasq-dhcp[4281]: DHCPACK(eth0) 169.254.1.19 00:1c:c4:71:17:0e PANDORA6 Sep 1 01:34:49 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:35:04 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:35:04 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:35:34 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:35:49 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:35:49 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:36:19 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:36:34 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:36:34 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:37:04 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:37:19 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:37:19 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:37:49 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:38:04 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:38:04 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:38:20 Customer Name admin[169.254.1.19]: web_interface: User 'admin' is logged in... Sep 1 01:38:34 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:38:49 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:38:49 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:39:19 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:39:34 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:39:34 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:40:04 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:40:19 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:40:49 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:41:04 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:41:34 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:43:21 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:43:36 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:43:36 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:44:06 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:44:21 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:44:21 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:44:51 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:45:06 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:45:06 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:45:36 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:45:51 Customer Name pppd[1724]: Timeout waiting for PADO packets Sep 1 01:45:51 Customer Name pppd[1724]: Unable to complete PPPoE Discovery Sep 1 01:46:21 Customer Name pppd[1724]: Interface ath0 has MTU of 1492. Sep 1 01:46:21 Customer Name pppd[1724]: PPP session is 2 Sep 1 01:46:21 Customer Name pppd[1724]: Using interface pppoe-wan Sep 1 01:46:21 Customer Name pppd[1724]: Connect: pppoe-wan <--> ath0 Sep 1 01:46:21 Customer Name pppd[1724]: CHAP authentication succeeded: Welcome. Sep 1 01:46:21 Customer Name pppd[1724]: CHAP authentication succeeded Sep 1 01:46:21 Customer Name pppd[1724]: peer from calling number 00:0C:42:97:70:04 authorized Sep 1 01:46:21 Customer Name pppd[1724]: local IP address 10.10.10.18 Sep 1 01:46:21 Customer Name pppd[1724]: remote IP address 10.10.10.254 Sep 1 01:46:21 Customer Name pppd[1724]: primary DNS address 10.120.12.30 Sep 1 01:46:21 Customer Name pppd[1724]: secondary DNS address 8.8.8.8 Sep 1 01:46:22 Customer Name ifup: Enabling Router Solicitations on wan (pppoe-wan) Sep 1 01:46:23 Customer Name firewall: adding wan (pppoe-wan) to zone wan