We have a ASA5520 with the 4 onboard ports.
DMZ LAN and Inside LAN take two of these ports. Currently we have 3 WAN connections (from 3 different sevice providers) and may get some more in the future.
Can we put all the WAN connections into the one interface using vlans ? And also is it possible to do failover with this type of set up ? That is if one WAN link goes down traffic can be routed out another vlan ?
What is the best way to do this set up ? Can you use floating static routes maybe ?
(Unfortunately, the expansion slot is reserved for an IPS card so we dont have the option to add in an SSM 4GE card to get more intercfaces )
Many thanks for you help.