RIP Metrics for directly connected networks
I notice that when a RIP speaking router advertises is directly connected networks it advetises them with a hop count of 1 and yet a "show ip route" on a directly connected neighbor doesn't increment that hop count to 2.
From the RFC:
Any host that uses RIP is assumed to have interfaces to one or more networks. These are referred to as its "directly-connected networks". The protocol relies on access to certain information about each of these networks. The most important is its metric or "cost". The metric of a network is an integer between 1 and 15 inclusive.
If I read that correctly zero is not a valid value, which explains why it advertises directly connected networks with a hop count of one. So my question, is there some type of logic in a Cisco router that says if I receive a RIP advertisment with a cost of one don't increment it. Do all RIP devices act in this same manner?