Multiple WAN connections are supported using Gateway Groups. Any number
of them may be PPPoE, DHCP, static, etc. Multi-Link PPP (MLPPP) is also
supported for bandwidth aggregation of multiple links on DSL providers
that support the technology.
Multi-WAN IPv6 is also possible, see Multi-WAN for IPv6
For guides on implementing Multi-WAN, see Multi-WAN and/or Multi-Link PPP (MP/MLPPP).