My ASA 5520 is used in transparent mode behind a router used as gateway (ex. 18.104.22.168) for all my hosts. Recently I have changed my topology from :
ASA -- ROUTER -- SW -- HOSTS
ROUTER -- ASA -- SW -- HOSTS
In the new topology I have some issue with the gateway on the outside interface. Cisco in this document (http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a008089f467.shtml) indicate to use the ip address of the ASA as default gateway and use another address (ex. 22.214.171.124) for the router. Some questions :
1. Is this the correct way ?
2. How to configure the ASA with multiple subnet on same/different VLAN ? Multi-context ?