Clarification
1. The virtual IP are Layer 3 IP's (they are not CARP or ProxyARP form)
2. Virtual IP with PPoE is referred to as configured VIP on Pfsense and pfsense WAN interface is configured as PPoE type. ( Sorry if I was not clear)
3. The purpose of creating the scenario 2 is, when I use PPoE as WAN interface on PFsense the internet connection is very slow and when I start ntop on the WAN interface, the WAN interface is turned off and on… This downtime is longer than what I have imagined (4 to 5 min)
4. In scenario 1 PPoE connection parameters (username and password) are configured on the pfsense WAN interface. But in scenario 2 the PPoE is initiated by the Netgear Modem (username and password are configured on the modem). and I have the link form Netgear modem to Pfsense(WAN Interface). This link is configured on 200.100.3.10/30 network. That is modem Management IP 200.100.3.11 and Pfsense WAN IP (STATIC) 200.100.3.12.
5. This setup brings stability on my wan interface... and when I run ntop, the down time is reduced to 1 sec..or less. This is the reason I want to make the second setup work.