ACE and RTSP over UDP

I have a VIP that is not able to stream RTSP over UDP. TCP streaming works fine, but when I configure UDP on the Real client no UDP packets are even processed by the ACE.
When I configure 'inspect rtsp' on the class, then TCP streaming also breaks. I am using A2.10.
Anyone got any hints on where I am going wrong ?
Greg
class-map match-all stream._rtsp554_vip
2 match virtual-address 10.216.35.75 tcp eq rtsp
class-map match-all stream._udp6970_vip
2 match virtual-address 10.216.35.75 udp eq 6970
policy-map type loadbalance first-match stream._rtsp554_vip-l7slb
class class-default
serverfarm stream._rtsp554_sfarm
policy-map type loadbalance first-match stream._udp6970_vip-l7slb
class class-default
serverfarm stream._UDP_sfarm
class stream._rtsp554_vip
loadbalance vip inservice
loadbalance policy stream._rtsp554_vip-l7slb
loadbalance vip icmp-reply active
nat dynamic 1598 vlan 1598
class stream._tcp8080_vip
loadbalance vip inservice
loadbalance policy stream._tcp8080_vip-l7slb
loadbalance vip icmp-reply active
nat dynamic 1598 vlan 1598
class stream._udp6970_vip
loadbalance vip inservice
loadbalance policy _udp6970_vip-l7slb
loadbalance vip icmp-reply active
nat dynamic 1598 vlan 1598

I have never got a chance to play with ACE + RTSP over UDP but
As per
http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/v3.00_A2/configuration/slb/guide/classlb.html#wp1165238
ACE supports RTSP over TCP Loadbalanacing only.
Similarly for RTSP Inspection its clearly stated at
http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/ace/v3.00_A2/configuration/security/guide/appinsp.html#wp1318637
For RTSP inspection
The ACE supports TCP only in conformity with RFC 2326.
HTH
Syed Iftekhar Ahmed

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