thank you fir your answer.
With your help i have now a working app.
i have changed in props.conf of the TA-cisco_ios following line :
nothing in the transforms.conf
and in the ciscoios i have created a local/eventtypes.conf with theses lines :
search = (sourcetype=network:ciscoswitch OR sourcetype=network:ciscowlc OR sourcetype=network:ciscocoeurreseau)