The network inside has multiple VLANs. Need to configure the FWSM for all the VLAN's with just 2 context in Active/Active mode.
How to do this.
The points below are the ones you need to follow. I suggest you to refer to the Configuration guide under the chapter "Transparent Firewal minimum configuration steps"
Step 1 Assigning VLANs to the Firewall Services Module, page 2-2 On the switch, you need to assign VLANs to the
FWSM so that the FWSM can send and receive traffic
on the switch.
Step 2 (Might be required) Adding Switched Virtual Interfaces to
the MSFC, page 2-5
If you want the MSFC to route between VLANs that
are assigned to the FWSM, complete this procedure.
Step 3 Connecting to the Firewall Services Module, page 3-1 From the switch CLI, you can session into the FWSM
to access the FWSM CLI.
Step 4 (Might be required; multiple context mode only) Enabling or
Disabling Multiple Context Mode, page 4-10
If you want to use multiple context mode and your
FWSM is not already configured for it, or if you want
to change back to single mode, follow this procedure.
Step 5 (Multiple context mode only) Configuring a Security
Context, page 4-18
Add a security context.
Step 6 (Multiple context mode only) Changing Between Contexts
and the System Execution Space, page 4-22
Because you must configure some settings in the
system execution space and some settings within the
context, you need to know how to switch between
contexts and the system execution space.
Step 7 Setting Transparent or Routed Firewall Mode, page 5-17 Before you configure any settings, you must set the
firewall mode to transparent mode. Changing the
mode clears your configuration. In multiple context
mode, set the mode in each context.
Step 8 Configuring Transparent Firewall Interface Parameters,
For each VLAN interface, you must set a name (such
as inside or outside), a security level, and a bridge
Step 9 Assigning an IP Address to a Bridge Group, page 6-5 Assign an IP address to each bridge group.
Step 10 Configuring a Default Route, page 8-3 Create a default route to an upstream router for
returning management traffic.
Step 11 Adding an Extended ACE, page 10-7 Before any traffic can go through the FWSM, you
must create an access list that permits traffic.
Step 12 Applying an Access List to an Interface, page 11-4 Apply the access list to an interface.
I hope it helps .. please rate it if it does !!!