I tried to add match protocol rtp audio to my class map, but it seems the box doesn't like that cmd
router(config)#class-map match-any REAL-TIME
router(config-cmap)#match protocol rtp audio
% Invalid input detected at '^' marker.
I am using an 871 cisco router with the IOS version : c870-advipservicesk9-mz.124-6.T5.bin
Could it be the IOS not accepting that cmd?
Thanks in advance