Hi, you can add the interfaces to the bridge group this will enable the router to bridge the traffic across the interfaces in the bridge-group. You can use a route map to send traffic from client across the bridg-group also. Have a look at the document from the link below and thesample config, this should help you.
http://www.cisco.com/en/US/products/hw/switches/ps5304/products_configuration_guide_chapter09186a008007d624.html
interface FastEthernet0/0.9
encapsulation dot1Q 222
no snmp trap link-status
bridge-group 222
interface FastEthernet0/1.9
encapsulation dot1Q 222
no snmp trap link-status
bridge-group 222
interface BVI222
description Quarantine Data Vlan
ip address 2.222.xxx.xxx 255.255.255.0
bridge 222 protocol ieee
bridge 222 route ip
