thank you very much Laz,
After setting topology VIDEO under global-address-family, i went (just) a little further to explore the commands of the cisco doc example
This is what i got
Surprisingly i did not get the network command under ‘config-router-af-topology’
I used this version of IOS in a GNS3 lab
So, and sorry about that, that takes me to a new question: in my example, how to activate the interfaces of the topology VIDEO for EIGRP ?
Thanks