This is a question about eigrp network statements . Say you have networks 172.16.8.0/24 ,172.16.9.0/24 and 172.17.1.0 . What would you use as a network statement ? Can you just use network 184.108.40.206 or does it have to be network 172.16.8.0 , network 172.16.9.0 and network 172.17.1.0 . Under what circumstances do you use a mask or inverted mask with the network statement , trying to compare this to say ospf . Thanks for the clarification , its not real clear even under cisco's config docs.